Structural changes in urea-formaldehyde resins during storage
13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Christjanson, P. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2002 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag Berlin Heidelberg 2002 |
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| Übergeordnetes Werk: |
Enthalten in: Holz als Roh- und Werkstoff - Springer-Verlag, 1937, 60(2002), 6 vom: Dez., Seite 379-384 |
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| Übergeordnetes Werk: |
volume:60 ; year:2002 ; number:6 ; month:12 ; pages:379-384 |
| Links: |
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| DOI / URN: |
10.1007/s00107-002-0326-9 |
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| Katalog-ID: |
OLC2096420563 |
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| 520 | |a 13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. | ||
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10.1007/s00107-002-0326-9 doi (DE-627)OLC2096420563 (DE-He213)s00107-002-0326-9-p DE-627 ger DE-627 rakwb eng 670 VZ 670 VZ 23 ssgn Christjanson, P. verfasserin aut Structural changes in urea-formaldehyde resins during storage 2002 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2002 13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. Acid Condensation Resin Part Monomeric Part Siimer, K. aut Pehk, T. aut Lasn, I. aut Enthalten in Holz als Roh- und Werkstoff Springer-Verlag, 1937 60(2002), 6 vom: Dez., Seite 379-384 (DE-627)129594962 (DE-600)240590-8 (DE-576)015087867 0018-3768 nnns volume:60 year:2002 number:6 month:12 pages:379-384 https://doi.org/10.1007/s00107-002-0326-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_20 GBV_ILN_23 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2112 GBV_ILN_2152 GBV_ILN_2542 GBV_ILN_4277 GBV_ILN_4313 GBV_ILN_4321 GBV_ILN_4330 GBV_ILN_4700 AR 60 2002 6 12 379-384 |
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10.1007/s00107-002-0326-9 doi (DE-627)OLC2096420563 (DE-He213)s00107-002-0326-9-p DE-627 ger DE-627 rakwb eng 670 VZ 670 VZ 23 ssgn Christjanson, P. verfasserin aut Structural changes in urea-formaldehyde resins during storage 2002 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2002 13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. Acid Condensation Resin Part Monomeric Part Siimer, K. aut Pehk, T. aut Lasn, I. aut Enthalten in Holz als Roh- und Werkstoff Springer-Verlag, 1937 60(2002), 6 vom: Dez., Seite 379-384 (DE-627)129594962 (DE-600)240590-8 (DE-576)015087867 0018-3768 nnns volume:60 year:2002 number:6 month:12 pages:379-384 https://doi.org/10.1007/s00107-002-0326-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_20 GBV_ILN_23 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2112 GBV_ILN_2152 GBV_ILN_2542 GBV_ILN_4277 GBV_ILN_4313 GBV_ILN_4321 GBV_ILN_4330 GBV_ILN_4700 AR 60 2002 6 12 379-384 |
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10.1007/s00107-002-0326-9 doi (DE-627)OLC2096420563 (DE-He213)s00107-002-0326-9-p DE-627 ger DE-627 rakwb eng 670 VZ 670 VZ 23 ssgn Christjanson, P. verfasserin aut Structural changes in urea-formaldehyde resins during storage 2002 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2002 13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. Acid Condensation Resin Part Monomeric Part Siimer, K. aut Pehk, T. aut Lasn, I. aut Enthalten in Holz als Roh- und Werkstoff Springer-Verlag, 1937 60(2002), 6 vom: Dez., Seite 379-384 (DE-627)129594962 (DE-600)240590-8 (DE-576)015087867 0018-3768 nnns volume:60 year:2002 number:6 month:12 pages:379-384 https://doi.org/10.1007/s00107-002-0326-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_20 GBV_ILN_23 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2112 GBV_ILN_2152 GBV_ILN_2542 GBV_ILN_4277 GBV_ILN_4313 GBV_ILN_4321 GBV_ILN_4330 GBV_ILN_4700 AR 60 2002 6 12 379-384 |
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10.1007/s00107-002-0326-9 doi (DE-627)OLC2096420563 (DE-He213)s00107-002-0326-9-p DE-627 ger DE-627 rakwb eng 670 VZ 670 VZ 23 ssgn Christjanson, P. verfasserin aut Structural changes in urea-formaldehyde resins during storage 2002 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2002 13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. Acid Condensation Resin Part Monomeric Part Siimer, K. aut Pehk, T. aut Lasn, I. aut Enthalten in Holz als Roh- und Werkstoff Springer-Verlag, 1937 60(2002), 6 vom: Dez., Seite 379-384 (DE-627)129594962 (DE-600)240590-8 (DE-576)015087867 0018-3768 nnns volume:60 year:2002 number:6 month:12 pages:379-384 https://doi.org/10.1007/s00107-002-0326-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_20 GBV_ILN_23 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2112 GBV_ILN_2152 GBV_ILN_2542 GBV_ILN_4277 GBV_ILN_4313 GBV_ILN_4321 GBV_ILN_4330 GBV_ILN_4700 AR 60 2002 6 12 379-384 |
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10.1007/s00107-002-0326-9 doi (DE-627)OLC2096420563 (DE-He213)s00107-002-0326-9-p DE-627 ger DE-627 rakwb eng 670 VZ 670 VZ 23 ssgn Christjanson, P. verfasserin aut Structural changes in urea-formaldehyde resins during storage 2002 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2002 13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. Acid Condensation Resin Part Monomeric Part Siimer, K. aut Pehk, T. aut Lasn, I. aut Enthalten in Holz als Roh- und Werkstoff Springer-Verlag, 1937 60(2002), 6 vom: Dez., Seite 379-384 (DE-627)129594962 (DE-600)240590-8 (DE-576)015087867 0018-3768 nnns volume:60 year:2002 number:6 month:12 pages:379-384 https://doi.org/10.1007/s00107-002-0326-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_20 GBV_ILN_23 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2112 GBV_ILN_2152 GBV_ILN_2542 GBV_ILN_4277 GBV_ILN_4313 GBV_ILN_4321 GBV_ILN_4330 GBV_ILN_4700 AR 60 2002 6 12 379-384 |
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Christjanson, P. |
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670 VZ 23 ssgn Structural changes in urea-formaldehyde resins during storage Acid Condensation Resin Part Monomeric Part |
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ddc 670 ssgn 23 misc Acid Condensation misc Resin Part misc Monomeric Part |
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Structural changes in urea-formaldehyde resins during storage |
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Structural changes in urea-formaldehyde resins during storage |
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Christjanson, P. Siimer, K. Pehk, T. Lasn, I. |
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structural changes in urea-formaldehyde resins during storage |
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Structural changes in urea-formaldehyde resins during storage |
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13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. © Springer-Verlag Berlin Heidelberg 2002 |
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13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. © Springer-Verlag Berlin Heidelberg 2002 |
| abstract_unstemmed |
13 C NMR spectroscopy. The three-step synthesis produces the resin consisting of two parts: the polymeric part from condensation of formaldehyde with first amount of urea, and monomeric part formed after addition of second part of urea. Some differences in structure depending on details of synthesis are of temporary character and level mainly in transhydroxymethylation from polymeric to monomeric part of resin. The reactions occuring after addition of second urea and following during storage are considered as one continuous process. Methylenes adjacent to secondary and tertiary amino groups form only during acid condensation. The main reaction during storage is the formation of methylenes adjacent to secondary amino groups. This reaction occurs between free terminal hydroxymethyl and amino groups of both resin parts. The physical and mechanical properties of particleboards confirm the close performance characteristics of studied resins. Particleboards satisfy requirements for general purpose boards P2 and emission standard E1. © Springer-Verlag Berlin Heidelberg 2002 |
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Structural changes in urea-formaldehyde resins during storage |
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