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Synthesis of Aliphatic Carbonate Macrodiols and Their Application as Sustainable Feedstock for Polyurethane

[Image: see text] High-molecular-weight poly(propylene carbonate) (PPC) [number-average molecular mass (M(n)): 80 000–100 000] is readily alcoholized into PPC macrodiols in the presence of 1,2-propanediol (PDO), 1,4-butanediol (BDO), or 1,6-hexanediol (HDO). The high-molecular-weight PPC and small a...

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Autores principales: Luo, Weikeng, Qin, Jiaxiang, Xiao, Min, Han, Dongmei, Wang, Shuanjin, Meng, Yuezhong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2017
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641315/
https://www.ncbi.nlm.nih.gov/pubmed/31457647
http://dx.doi.org/10.1021/acsomega.7b00183
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author Luo, Weikeng
Qin, Jiaxiang
Xiao, Min
Han, Dongmei
Wang, Shuanjin
Meng, Yuezhong
author_facet Luo, Weikeng
Qin, Jiaxiang
Xiao, Min
Han, Dongmei
Wang, Shuanjin
Meng, Yuezhong
author_sort Luo, Weikeng
collection PubMed
description [Image: see text] High-molecular-weight poly(propylene carbonate) (PPC) [number-average molecular mass (M(n)): 80 000–100 000] is readily alcoholized into PPC macrodiols in the presence of 1,2-propanediol (PDO), 1,4-butanediol (BDO), or 1,6-hexanediol (HDO). The high-molecular-weight PPC and small amount of diols, such as PDO, BDO, or HDO, were stirred at elevated temperatures to convert the extremely viscous high-molecular-weight polymer to low-molecular-weight macrodiols with gel permeation chromatography-measured M(n) of about 3000 Da. The chopping reaction of the high-molecular-weight PPC was studied in detail, such as the influences of the catalyst residue, the kinds of alcoholysis agents, reaction temperature, and time. The reaction mechanism of alcoholysis is proposed according to the experimental results. The results indicate that the presence of a trace residue of zinc catalyst (Zn-G-III) in PPC, excess diol feeding, and higher temperature can accelerate the alcoholysis. Moreover, different diols can produce different PPC macrodiols with varying end-capping. Finally, polycarbonate ether urethane can be successfully synthesized using as-synthesized PPC macrodiols and poly(propylene glycol) (M(n) ≈ 3000) as the soft segment and 4,4′-diphenylmethane diisocyanate or BDO as the hard segment. The full evaluation for the synthesized PPC macrodiols demonstrates their potential applications in the polyurethane industry.
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spelling pubmed-66413152019-08-27 Synthesis of Aliphatic Carbonate Macrodiols and Their Application as Sustainable Feedstock for Polyurethane Luo, Weikeng Qin, Jiaxiang Xiao, Min Han, Dongmei Wang, Shuanjin Meng, Yuezhong ACS Omega [Image: see text] High-molecular-weight poly(propylene carbonate) (PPC) [number-average molecular mass (M(n)): 80 000–100 000] is readily alcoholized into PPC macrodiols in the presence of 1,2-propanediol (PDO), 1,4-butanediol (BDO), or 1,6-hexanediol (HDO). The high-molecular-weight PPC and small amount of diols, such as PDO, BDO, or HDO, were stirred at elevated temperatures to convert the extremely viscous high-molecular-weight polymer to low-molecular-weight macrodiols with gel permeation chromatography-measured M(n) of about 3000 Da. The chopping reaction of the high-molecular-weight PPC was studied in detail, such as the influences of the catalyst residue, the kinds of alcoholysis agents, reaction temperature, and time. The reaction mechanism of alcoholysis is proposed according to the experimental results. The results indicate that the presence of a trace residue of zinc catalyst (Zn-G-III) in PPC, excess diol feeding, and higher temperature can accelerate the alcoholysis. Moreover, different diols can produce different PPC macrodiols with varying end-capping. Finally, polycarbonate ether urethane can be successfully synthesized using as-synthesized PPC macrodiols and poly(propylene glycol) (M(n) ≈ 3000) as the soft segment and 4,4′-diphenylmethane diisocyanate or BDO as the hard segment. The full evaluation for the synthesized PPC macrodiols demonstrates their potential applications in the polyurethane industry. American Chemical Society 2017-07-07 /pmc/articles/PMC6641315/ /pubmed/31457647 http://dx.doi.org/10.1021/acsomega.7b00183 Text en Copyright © 2017 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Luo, Weikeng
Qin, Jiaxiang
Xiao, Min
Han, Dongmei
Wang, Shuanjin
Meng, Yuezhong
Synthesis of Aliphatic Carbonate Macrodiols and Their Application as Sustainable Feedstock for Polyurethane
title Synthesis of Aliphatic Carbonate Macrodiols and Their Application as Sustainable Feedstock for Polyurethane
title_full Synthesis of Aliphatic Carbonate Macrodiols and Their Application as Sustainable Feedstock for Polyurethane
title_fullStr Synthesis of Aliphatic Carbonate Macrodiols and Their Application as Sustainable Feedstock for Polyurethane
title_full_unstemmed Synthesis of Aliphatic Carbonate Macrodiols and Their Application as Sustainable Feedstock for Polyurethane
title_short Synthesis of Aliphatic Carbonate Macrodiols and Their Application as Sustainable Feedstock for Polyurethane
title_sort synthesis of aliphatic carbonate macrodiols and their application as sustainable feedstock for polyurethane
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641315/
https://www.ncbi.nlm.nih.gov/pubmed/31457647
http://dx.doi.org/10.1021/acsomega.7b00183
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