Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid
Biodegradable and hydrophilic functional polyesters were synthesized enzymatically using xylitol or d-sorbitol together with divinyl adipate and lipase B from Candida antartica (CAL-B). The resulting polyesters had pendant OH-groups from their sugar units which were esterified to different degrees w...
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ftpubmed:oai:pubmedcentral.nih.gov:6432536 2023-05-15T14:15:24+02:00 Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid Bilal, Muhammad Humayun Prehm, Marko Njau, Andrew Efraim Samiullah, Muhammad Haris Meister, Annette Kressler, Jörg 2016-03-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432536/ https://doi.org/10.3390/polym8030080 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432536/ http://dx.doi.org/10.3390/polym8030080 © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Article Text 2016 ftpubmed https://doi.org/10.3390/polym8030080 2019-04-07T00:40:00Z Biodegradable and hydrophilic functional polyesters were synthesized enzymatically using xylitol or d-sorbitol together with divinyl adipate and lipase B from Candida antartica (CAL-B). The resulting polyesters had pendant OH-groups from their sugar units which were esterified to different degrees with stearic acid chloride. The structure and the degrees of polymerization of the resulting graft copolymers based on poly(xylitol adipate) and poly(d-sorbitol adipate) were characterized by (1)H NMR spectroscopy and SEC. DSC, WAXS and SAXS measurements indicated that a phase separation between polymer backbone and stearoyl side chains occurred in the graft copolymers, and, additionally, the side chains were able to crystallize which resulted in the formation of a lamellar morphology. Additionally, nanoparticles of the graft copolymers in an aqueous environment were studied by DLS and negative stain TEM. Text antartic* PubMed Central (PMC) Polymers 8 3 80 |
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Article Bilal, Muhammad Humayun Prehm, Marko Njau, Andrew Efraim Samiullah, Muhammad Haris Meister, Annette Kressler, Jörg Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid |
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Article |
description |
Biodegradable and hydrophilic functional polyesters were synthesized enzymatically using xylitol or d-sorbitol together with divinyl adipate and lipase B from Candida antartica (CAL-B). The resulting polyesters had pendant OH-groups from their sugar units which were esterified to different degrees with stearic acid chloride. The structure and the degrees of polymerization of the resulting graft copolymers based on poly(xylitol adipate) and poly(d-sorbitol adipate) were characterized by (1)H NMR spectroscopy and SEC. DSC, WAXS and SAXS measurements indicated that a phase separation between polymer backbone and stearoyl side chains occurred in the graft copolymers, and, additionally, the side chains were able to crystallize which resulted in the formation of a lamellar morphology. Additionally, nanoparticles of the graft copolymers in an aqueous environment were studied by DLS and negative stain TEM. |
format |
Text |
author |
Bilal, Muhammad Humayun Prehm, Marko Njau, Andrew Efraim Samiullah, Muhammad Haris Meister, Annette Kressler, Jörg |
author_facet |
Bilal, Muhammad Humayun Prehm, Marko Njau, Andrew Efraim Samiullah, Muhammad Haris Meister, Annette Kressler, Jörg |
author_sort |
Bilal, Muhammad Humayun |
title |
Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid |
title_short |
Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid |
title_full |
Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid |
title_fullStr |
Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid |
title_full_unstemmed |
Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid |
title_sort |
enzymatic synthesis and characterization of hydrophilic sugar based polyesters and their modification with stearic acid |
publisher |
MDPI |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432536/ https://doi.org/10.3390/polym8030080 |
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antartic* |
genre_facet |
antartic* |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432536/ http://dx.doi.org/10.3390/polym8030080 |
op_rights |
© 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
op_doi |
https://doi.org/10.3390/polym8030080 |
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Polymers |
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