期刊
POLYMERS
卷 8, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/polym8030080
关键词
stearic acid; crystallization; sugars; enzymatic synthesis; biodegradable polyesters; nanoparticles; graft copolymers
资金
- Agrochemisches Aninstitut e.V. Piesteritz
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 H-1 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.
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