Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach

Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic aci...
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Autor*in:	Liu, Shunjie [verfasserIn] Qin, Yusheng [verfasserIn] Guo, Hongchen [verfasserIn] Wang, Xianhong [verfasserIn] Wang, Fosong [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2016

Schlagwörter:	CO -polyols renewable starter acid value controllable copolymerization preactivation approach

Übergeordnetes Werk:	Enthalten in: Science in China - Asheville, NC : Science in China Press, 1995, 59(2016), 11 vom: 20. Juli, Seite 1369-1375
Übergeordnetes Werk:	volume:59 ; year:2016 ; number:11 ; day:20 ; month:07 ; pages:1369-1375

Links:	Volltext

DOI / URN:	10.1007/s11426-016-0090-3

Katalog-ID:	SPR019173407

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520			\|a Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable.
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allfields	10.1007/s11426-016-0090-3 doi (DE-627)SPR019173407 (SPR)s11426-016-0090-3-e DE-627 ger DE-627 rakwb eng 540 550 570 ASE 35.00 bkl Liu, Shunjie verfasserin aut Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable. CO (dpeaa)DE-He213 -polyols (dpeaa)DE-He213 renewable starter (dpeaa)DE-He213 acid value (dpeaa)DE-He213 controllable copolymerization (dpeaa)DE-He213 preactivation approach (dpeaa)DE-He213 Qin, Yusheng verfasserin aut Guo, Hongchen verfasserin aut Wang, Xianhong verfasserin aut Wang, Fosong verfasserin aut Enthalten in Science in China Asheville, NC : Science in China Press, 1995 59(2016), 11 vom: 20. Juli, Seite 1369-1375 (DE-627)327310405 (DE-600)2043454-6 1862-2771 nnns volume:59 year:2016 number:11 day:20 month:07 pages:1369-1375 https://dx.doi.org/10.1007/s11426-016-0090-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 35.00 ASE AR 59 2016 11 20 07 1369-1375
spelling	10.1007/s11426-016-0090-3 doi (DE-627)SPR019173407 (SPR)s11426-016-0090-3-e DE-627 ger DE-627 rakwb eng 540 550 570 ASE 35.00 bkl Liu, Shunjie verfasserin aut Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable. CO (dpeaa)DE-He213 -polyols (dpeaa)DE-He213 renewable starter (dpeaa)DE-He213 acid value (dpeaa)DE-He213 controllable copolymerization (dpeaa)DE-He213 preactivation approach (dpeaa)DE-He213 Qin, Yusheng verfasserin aut Guo, Hongchen verfasserin aut Wang, Xianhong verfasserin aut Wang, Fosong verfasserin aut Enthalten in Science in China Asheville, NC : Science in China Press, 1995 59(2016), 11 vom: 20. Juli, Seite 1369-1375 (DE-627)327310405 (DE-600)2043454-6 1862-2771 nnns volume:59 year:2016 number:11 day:20 month:07 pages:1369-1375 https://dx.doi.org/10.1007/s11426-016-0090-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 35.00 ASE AR 59 2016 11 20 07 1369-1375
allfields_unstemmed	10.1007/s11426-016-0090-3 doi (DE-627)SPR019173407 (SPR)s11426-016-0090-3-e DE-627 ger DE-627 rakwb eng 540 550 570 ASE 35.00 bkl Liu, Shunjie verfasserin aut Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable. CO (dpeaa)DE-He213 -polyols (dpeaa)DE-He213 renewable starter (dpeaa)DE-He213 acid value (dpeaa)DE-He213 controllable copolymerization (dpeaa)DE-He213 preactivation approach (dpeaa)DE-He213 Qin, Yusheng verfasserin aut Guo, Hongchen verfasserin aut Wang, Xianhong verfasserin aut Wang, Fosong verfasserin aut Enthalten in Science in China Asheville, NC : Science in China Press, 1995 59(2016), 11 vom: 20. Juli, Seite 1369-1375 (DE-627)327310405 (DE-600)2043454-6 1862-2771 nnns volume:59 year:2016 number:11 day:20 month:07 pages:1369-1375 https://dx.doi.org/10.1007/s11426-016-0090-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 35.00 ASE AR 59 2016 11 20 07 1369-1375
allfieldsGer	10.1007/s11426-016-0090-3 doi (DE-627)SPR019173407 (SPR)s11426-016-0090-3-e DE-627 ger DE-627 rakwb eng 540 550 570 ASE 35.00 bkl Liu, Shunjie verfasserin aut Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable. CO (dpeaa)DE-He213 -polyols (dpeaa)DE-He213 renewable starter (dpeaa)DE-He213 acid value (dpeaa)DE-He213 controllable copolymerization (dpeaa)DE-He213 preactivation approach (dpeaa)DE-He213 Qin, Yusheng verfasserin aut Guo, Hongchen verfasserin aut Wang, Xianhong verfasserin aut Wang, Fosong verfasserin aut Enthalten in Science in China Asheville, NC : Science in China Press, 1995 59(2016), 11 vom: 20. Juli, Seite 1369-1375 (DE-627)327310405 (DE-600)2043454-6 1862-2771 nnns volume:59 year:2016 number:11 day:20 month:07 pages:1369-1375 https://dx.doi.org/10.1007/s11426-016-0090-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 35.00 ASE AR 59 2016 11 20 07 1369-1375
allfieldsSound	10.1007/s11426-016-0090-3 doi (DE-627)SPR019173407 (SPR)s11426-016-0090-3-e DE-627 ger DE-627 rakwb eng 540 550 570 ASE 35.00 bkl Liu, Shunjie verfasserin aut Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable. CO (dpeaa)DE-He213 -polyols (dpeaa)DE-He213 renewable starter (dpeaa)DE-He213 acid value (dpeaa)DE-He213 controllable copolymerization (dpeaa)DE-He213 preactivation approach (dpeaa)DE-He213 Qin, Yusheng verfasserin aut Guo, Hongchen verfasserin aut Wang, Xianhong verfasserin aut Wang, Fosong verfasserin aut Enthalten in Science in China Asheville, NC : Science in China Press, 1995 59(2016), 11 vom: 20. Juli, Seite 1369-1375 (DE-627)327310405 (DE-600)2043454-6 1862-2771 nnns volume:59 year:2016 number:11 day:20 month:07 pages:1369-1375 https://dx.doi.org/10.1007/s11426-016-0090-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 35.00 ASE AR 59 2016 11 20 07 1369-1375
language	English
source	Enthalten in Science in China 59(2016), 11 vom: 20. Juli, Seite 1369-1375 volume:59 year:2016 number:11 day:20 month:07 pages:1369-1375
sourceStr	Enthalten in Science in China 59(2016), 11 vom: 20. Juli, Seite 1369-1375 volume:59 year:2016 number:11 day:20 month:07 pages:1369-1375
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	CO -polyols renewable starter acid value controllable copolymerization preactivation approach
dewey-raw	540
isfreeaccess_bool	false
container_title	Science in China
authorswithroles_txt_mv	Liu, Shunjie @@aut@@ Qin, Yusheng @@aut@@ Guo, Hongchen @@aut@@ Wang, Xianhong @@aut@@ Wang, Fosong @@aut@@
publishDateDaySort_date	2016-07-20T00:00:00Z
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However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. 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author	Liu, Shunjie
spellingShingle	Liu, Shunjie ddc 540 bkl 35.00 misc CO misc -polyols misc renewable starter misc acid value misc controllable copolymerization misc preactivation approach Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach
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topic_title	540 550 570 ASE 35.00 bkl Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach CO (dpeaa)DE-He213 -polyols (dpeaa)DE-He213 renewable starter (dpeaa)DE-He213 acid value (dpeaa)DE-He213 controllable copolymerization (dpeaa)DE-He213 preactivation approach (dpeaa)DE-He213
topic	ddc 540 bkl 35.00 misc CO misc -polyols misc renewable starter misc acid value misc controllable copolymerization misc preactivation approach
topic_unstemmed	ddc 540 bkl 35.00 misc CO misc -polyols misc renewable starter misc acid value misc controllable copolymerization misc preactivation approach
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title	Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach
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title_full	Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach
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title_sort	controlled synthesis of $ co_{2} $-diol from renewable starter by reducing acid value through preactivation approach
title_auth	Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach
abstract	Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable.
abstractGer	Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable.
abstract_unstemmed	Abstract Synthesis of polyols from carbon dioxide ($ CO_{2} $) is attractive from the viewpoint of sustainable development of polyurethane industry; it is also interesting to adjust the structure of the $ CO_{2} $-polyols for versatile requirement of polyurethane. However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. Moreover, by means of preactivation approach, the molecular weight as well as the carbonate unit content in the $ CO_{2} $-diol was also controllable.
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title_short	Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach
url	https://dx.doi.org/10.1007/s11426-016-0090-3
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author2	Qin, Yusheng Guo, Hongchen Wang, Xianhong Wang, Fosong
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up_date	2024-07-04T00:28:30.104Z
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However, when renewable malonic acid was used as a starter, the copolymerization reaction of $ CO_{2} $ and propylene oxide (PO) was uncontrollable, since it proceeded slowly (13 h) and produced 40.4 wt% of byproduct propylene carbonate (PC) with a low productivity of 0.34 kg/g. A careful analysis disclosed that the acid value of the copolymerization medium was the key factor for controlling the copolymerization reaction. Therefore, a preactivation approach was developed to dramatically reduce the acid value to ~0.6 mg(KOH)/g by homopolymerization of PO into oligo-ether-diol under the initiation of malonic acid, which ensured the controllable copolymerization, where the copolymerization time could be shortened by 77% from 13 to 3 h, the PC content was reduced by 76% from 40.4 wt% to 9.4 wt%, and the productivity increased by 61% from 0.34 to 0.55 kg/g. 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Controlled synthesis of $ CO_{2} $-diol from renewable starter by reducing acid value through preactivation approach

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