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Synthesis of novel biodegradable poly(butylene succinate) copolyesters composing of isosorbide and poly(ethylene glycol)

机译:异山梨醇和聚乙二醇组成的新型可生物降解的聚(琥珀酸丁二酯)共聚酯的合成

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摘要

A series of biodegradable isosorbide-based copolyesters poly(butylene succinate-co-isosorbide succinate-co-polyethyleneoxide succinate) (PB _xI_yE_zS) were synthesized via bulk polycondensation in the presence of dimethyl succinate (DMS), 1,4-butanediol (BDO), poly(ethylene glycol) (PEG) and isosorbide (ISO). The crystallization behaviors, crystal structure and spherulite morphology of the copolyesters were analyzed by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) and polarizing optical microscopy (POM), respectively. The results indicate that the crystallization behavior of the copolyesters was influenced by the content of isosorbide succinate (IS) and polyethyleneoxide succinate (PEOS) units, which further tuned the mechanical and biodegradable properties of the copolyesters. The PB_xI_yE_zS copolyesters, compared to pure poly(butylene succinate), showed lower crystallization temperature, melting temperature, degree of crystallinity and degradation rate while a significant increase in glass transition temperature with increasing isosorbide content.
机译:在丁二酸二甲酯(DMS),1,4-丁二醇(BDO)存在下,通过本体缩聚反应合成了一系列可生物降解的异山梨醇基共聚酯,聚乙二醇(PEG)和异山梨醇(ISO)。分别通过差示扫描量热法(DSC),广角X射线衍射(WAXD)和偏光光学显微镜(POM)分析了共聚酯的结晶行为,晶体结构和球晶形态。结果表明,共聚聚酯的结晶行为受到异山梨醇琥珀酸酯(IS)和聚环氧乙烷琥珀酸酯(PEOS)单元含量的影响,这进一步调节了共聚酯的机械和生物降解性能。与纯聚丁二酸丁二酸酯相比,PB_xI_yE_zS共聚酯显示出较低的结晶温度,熔融温度,结晶度和降解速率,同时随着异山梨醇含量的增加,玻璃化转变温度显着提高。

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