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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Multidisciplinary Digital Publishing Institute
2016
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ftmdpi:oai:mdpi.com:/2073-4360/8/3/80/ 2023-08-20T04:02:38+02:00 Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid Muhammad Bilal Marko Prehm Andrew Njau Muhammad Samiullah Annette Meister Jörg Kressler 2016-03-16 application/pdf https://doi.org/10.3390/polym8030080 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/polym8030080 https://creativecommons.org/licenses/by/4.0/ Polymers; Volume 8; Issue 3; Pages: 80 enzymatic synthesis biodegradable polyesters sugars graft copolymers stearic acid crystallization nanoparticles Text 2016 ftmdpi https://doi.org/10.3390/polym8030080 2023-07-31T20:51:19Z 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 1H 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* MDPI Open Access Publishing Polymers 8 3 80 |
institution |
Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
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English |
topic |
enzymatic synthesis biodegradable polyesters sugars graft copolymers stearic acid crystallization nanoparticles |
spellingShingle |
enzymatic synthesis biodegradable polyesters sugars graft copolymers stearic acid crystallization nanoparticles Muhammad Bilal Marko Prehm Andrew Njau Muhammad Samiullah Annette Meister Jörg Kressler Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid |
topic_facet |
enzymatic synthesis biodegradable polyesters sugars graft copolymers stearic acid crystallization nanoparticles |
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 1H 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 |
Muhammad Bilal Marko Prehm Andrew Njau Muhammad Samiullah Annette Meister Jörg Kressler |
author_facet |
Muhammad Bilal Marko Prehm Andrew Njau Muhammad Samiullah Annette Meister Jörg Kressler |
author_sort |
Muhammad Bilal |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2016 |
url |
https://doi.org/10.3390/polym8030080 |
genre |
antartic* |
genre_facet |
antartic* |
op_source |
Polymers; Volume 8; Issue 3; Pages: 80 |
op_relation |
https://dx.doi.org/10.3390/polym8030080 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/polym8030080 |
container_title |
Polymers |
container_volume |
8 |
container_issue |
3 |
container_start_page |
80 |
_version_ |
1774713199747137536 |