Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties

It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabil...
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Autor*in:	Wenwu Lei [verfasserIn] Dengyu Wang [verfasserIn] Qi Liu [verfasserIn] Kui Li [verfasserIn] Ying Li [verfasserIn] Fei Zhong [verfasserIn] Qiancheng Liu [verfasserIn] Pan Wang [verfasserIn] Wei Feng [verfasserIn] Xulin Yang [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	foaming temperature phthalonitrile foam large-scale production benzoxazine-phthalonitrile foam

Übergeordnetes Werk:	In: Polymers - MDPI AG, 2011, 14(2022), 24, p 5410
Übergeordnetes Werk:	volume:14 ; year:2022 ; number:24, p 5410

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/polym14245410

Katalog-ID:	DOAJ082995710

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allfields	10.3390/polym14245410 doi (DE-627)DOAJ082995710 (DE-599)DOAJ048f896b663c4881b252aa8db90cc04a DE-627 ger DE-627 rakwb eng QD241-441 Wenwu Lei verfasserin aut Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. Mechanically robust, flame-retardant, and uniform large-size BZPN foam are promising light durable materials with high service temperatures, i.e., as filling materials even in a very narrow pipette. foaming temperature phthalonitrile foam large-scale production benzoxazine-phthalonitrile foam Organic chemistry Dengyu Wang verfasserin aut Qi Liu verfasserin aut Kui Li verfasserin aut Ying Li verfasserin aut Fei Zhong verfasserin aut Qiancheng Liu verfasserin aut Pan Wang verfasserin aut Wei Feng verfasserin aut Xulin Yang verfasserin aut In Polymers MDPI AG, 2011 14(2022), 24, p 5410 (DE-627)61409612X (DE-600)2527146-5 20734360 nnns volume:14 year:2022 number:24, p 5410 https://doi.org/10.3390/polym14245410 kostenfrei https://doaj.org/article/048f896b663c4881b252aa8db90cc04a kostenfrei https://www.mdpi.com/2073-4360/14/24/5410 kostenfrei https://doaj.org/toc/2073-4360 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2022 24, p 5410
spelling	10.3390/polym14245410 doi (DE-627)DOAJ082995710 (DE-599)DOAJ048f896b663c4881b252aa8db90cc04a DE-627 ger DE-627 rakwb eng QD241-441 Wenwu Lei verfasserin aut Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. Mechanically robust, flame-retardant, and uniform large-size BZPN foam are promising light durable materials with high service temperatures, i.e., as filling materials even in a very narrow pipette. foaming temperature phthalonitrile foam large-scale production benzoxazine-phthalonitrile foam Organic chemistry Dengyu Wang verfasserin aut Qi Liu verfasserin aut Kui Li verfasserin aut Ying Li verfasserin aut Fei Zhong verfasserin aut Qiancheng Liu verfasserin aut Pan Wang verfasserin aut Wei Feng verfasserin aut Xulin Yang verfasserin aut In Polymers MDPI AG, 2011 14(2022), 24, p 5410 (DE-627)61409612X (DE-600)2527146-5 20734360 nnns volume:14 year:2022 number:24, p 5410 https://doi.org/10.3390/polym14245410 kostenfrei https://doaj.org/article/048f896b663c4881b252aa8db90cc04a kostenfrei https://www.mdpi.com/2073-4360/14/24/5410 kostenfrei https://doaj.org/toc/2073-4360 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2022 24, p 5410
allfields_unstemmed	10.3390/polym14245410 doi (DE-627)DOAJ082995710 (DE-599)DOAJ048f896b663c4881b252aa8db90cc04a DE-627 ger DE-627 rakwb eng QD241-441 Wenwu Lei verfasserin aut Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. Mechanically robust, flame-retardant, and uniform large-size BZPN foam are promising light durable materials with high service temperatures, i.e., as filling materials even in a very narrow pipette. foaming temperature phthalonitrile foam large-scale production benzoxazine-phthalonitrile foam Organic chemistry Dengyu Wang verfasserin aut Qi Liu verfasserin aut Kui Li verfasserin aut Ying Li verfasserin aut Fei Zhong verfasserin aut Qiancheng Liu verfasserin aut Pan Wang verfasserin aut Wei Feng verfasserin aut Xulin Yang verfasserin aut In Polymers MDPI AG, 2011 14(2022), 24, p 5410 (DE-627)61409612X (DE-600)2527146-5 20734360 nnns volume:14 year:2022 number:24, p 5410 https://doi.org/10.3390/polym14245410 kostenfrei https://doaj.org/article/048f896b663c4881b252aa8db90cc04a kostenfrei https://www.mdpi.com/2073-4360/14/24/5410 kostenfrei https://doaj.org/toc/2073-4360 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2022 24, p 5410
allfieldsGer	10.3390/polym14245410 doi (DE-627)DOAJ082995710 (DE-599)DOAJ048f896b663c4881b252aa8db90cc04a DE-627 ger DE-627 rakwb eng QD241-441 Wenwu Lei verfasserin aut Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. Mechanically robust, flame-retardant, and uniform large-size BZPN foam are promising light durable materials with high service temperatures, i.e., as filling materials even in a very narrow pipette. foaming temperature phthalonitrile foam large-scale production benzoxazine-phthalonitrile foam Organic chemistry Dengyu Wang verfasserin aut Qi Liu verfasserin aut Kui Li verfasserin aut Ying Li verfasserin aut Fei Zhong verfasserin aut Qiancheng Liu verfasserin aut Pan Wang verfasserin aut Wei Feng verfasserin aut Xulin Yang verfasserin aut In Polymers MDPI AG, 2011 14(2022), 24, p 5410 (DE-627)61409612X (DE-600)2527146-5 20734360 nnns volume:14 year:2022 number:24, p 5410 https://doi.org/10.3390/polym14245410 kostenfrei https://doaj.org/article/048f896b663c4881b252aa8db90cc04a kostenfrei https://www.mdpi.com/2073-4360/14/24/5410 kostenfrei https://doaj.org/toc/2073-4360 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2022 24, p 5410
allfieldsSound	10.3390/polym14245410 doi (DE-627)DOAJ082995710 (DE-599)DOAJ048f896b663c4881b252aa8db90cc04a DE-627 ger DE-627 rakwb eng QD241-441 Wenwu Lei verfasserin aut Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. Mechanically robust, flame-retardant, and uniform large-size BZPN foam are promising light durable materials with high service temperatures, i.e., as filling materials even in a very narrow pipette. foaming temperature phthalonitrile foam large-scale production benzoxazine-phthalonitrile foam Organic chemistry Dengyu Wang verfasserin aut Qi Liu verfasserin aut Kui Li verfasserin aut Ying Li verfasserin aut Fei Zhong verfasserin aut Qiancheng Liu verfasserin aut Pan Wang verfasserin aut Wei Feng verfasserin aut Xulin Yang verfasserin aut In Polymers MDPI AG, 2011 14(2022), 24, p 5410 (DE-627)61409612X (DE-600)2527146-5 20734360 nnns volume:14 year:2022 number:24, p 5410 https://doi.org/10.3390/polym14245410 kostenfrei https://doaj.org/article/048f896b663c4881b252aa8db90cc04a kostenfrei https://www.mdpi.com/2073-4360/14/24/5410 kostenfrei https://doaj.org/toc/2073-4360 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2022 24, p 5410
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source	In Polymers 14(2022), 24, p 5410 volume:14 year:2022 number:24, p 5410
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callnumber-first	Q - Science
author	Wenwu Lei
spellingShingle	Wenwu Lei misc QD241-441 misc foaming temperature misc phthalonitrile foam misc large-scale production misc benzoxazine-phthalonitrile foam misc Organic chemistry Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties
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topic_title	QD241-441 Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties foaming temperature phthalonitrile foam large-scale production benzoxazine-phthalonitrile foam
topic	misc QD241-441 misc foaming temperature misc phthalonitrile foam misc large-scale production misc benzoxazine-phthalonitrile foam misc Organic chemistry
topic_unstemmed	misc QD241-441 misc foaming temperature misc phthalonitrile foam misc large-scale production misc benzoxazine-phthalonitrile foam misc Organic chemistry
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title	Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties
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title_full	Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties
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author_browse	Wenwu Lei Dengyu Wang Qi Liu Kui Li Ying Li Fei Zhong Qiancheng Liu Pan Wang Wei Feng Xulin Yang
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title_sort	large-scale preparation of uniform millet bread-like durable benzoxazine-phthalonitrile foam with outstanding mechanical and thermal properties
callnumber	QD241-441
title_auth	Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties
abstract	It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. Mechanically robust, flame-retardant, and uniform large-size BZPN foam are promising light durable materials with high service temperatures, i.e., as filling materials even in a very narrow pipette.
abstractGer	It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. Mechanically robust, flame-retardant, and uniform large-size BZPN foam are promising light durable materials with high service temperatures, i.e., as filling materials even in a very narrow pipette.
abstract_unstemmed	It is essentially important to develop durable polymer foams for services in high-temperature conditions. The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. Mechanically robust, flame-retardant, and uniform large-size BZPN foam are promising light durable materials with high service temperatures, i.e., as filling materials even in a very narrow pipette.
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title_short	Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties
url	https://doi.org/10.3390/polym14245410 https://doaj.org/article/048f896b663c4881b252aa8db90cc04a https://www.mdpi.com/2073-4360/14/24/5410 https://doaj.org/toc/2073-4360
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up_date	2024-07-03T14:57:36.782Z
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The current study reported the preparations and properties of a high-performance benzoxazine-phthalonitrile (BZPN) foam by utilizing azodicarbonamide and tween-80 as the blowing agent and stabilizer, respectively. Rheological and curing studies indicated that the appropriate foaming temperature for BZPN foam is below 180 °C, and its foaming viscosity window is below 20 Pa·s. Guided by these results, uniform millet bread-like BZPN foams with decimeter leveling size were successfully realized, suggesting the high prospect of large-scale production. The structural, mechanical, and thermal properties of BZPN foams were then investigated in detail. BZPN foam involves a hierarchical fracture mechanism during the compressive test, and it shows a high compression strength of over 6 MPa. During a burning test over 380 °C, no visible smoke, softening, or droplet phenomena appeared and the macroscopic structure of BZPN foam was well maintained. 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Large-Scale Preparation of Uniform Millet Bread-like Durable Benzoxazine-Phthalonitrile Foam with Outstanding Mechanical and Thermal Properties

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