Biodegradable Copolyesters of Poly(hexamethylene terephthalate) Containing Bicyclic 2,4:3,5‐Di‐O‐methylene‐d‐Glucarate Units
Biodegradable Copolyesters of Poly(hexamethylene terephthalate) Containing Bicyclic 2,4:3,5‐Di‐O‐methylene‐d‐Glucarate Units
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含有双环 2,4:3,5-二-O-亚甲基-d-葡萄糖二酸酯单元的可生物降解的聚对苯二甲酸己二酯共聚酯
DOI：
10.1002/macp.201400299
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发表时间：
2014
影响因子：
2.5
通讯作者：
S. Muñoz
中科院分区：
文献类型：
--
作者：
Cristina Japu;A. M. D. Ilarduya;A. Alla;M. García;J. Galbis;S. Muñoz
通过1，6-己二醇（HD）与对苯二甲酸二甲酯（DMT）和2，4：3，5-二-O-亚甲基-d-葡萄糖二酸二甲酯（Glux）的混合物的熔融缩聚，制备了一组共聚酯（PHTxGluxy），除了母体均聚酯聚对苯二甲酸乙二醇酯（PHT）和PHGlux之外，其组成范围在90/10和50/50之间。共聚酯在35 000-45 000 g mol-1范围内具有内联图像，它们的微观结构是随机的，并且它们在远高于300 °C的温度下开始分解。PHT的结晶性被共聚抑制，使得含有超过20%的糖基单元的共聚酯基本上是无定形的。相反，PHTxGluxy显示出Tg随着组成从PHT中的16 °C单调增加到PHGlux中的73 °C。与PHT相比，共聚酯显示出对水解的突出敏感性，并且在生理条件下孵育时对脂肪酶的作用敏感。PHTxGluxy的降解性随着Glux单元含量的增加而增加。
A set of copolyesters (PHTxGluxy) with compositions ranging between 90/10 and 50/50 in addition to the parent homopolyesters poly(hexamethylene terephthalate) (PHT) and PHGlux, are prepared by the melt polycondensation of 1,6-hexanediol (HD) with mixtures of dimethyl terephthalate (DMT) and dimethyl 2,4:3,5-di-O-methylene-d-glucarate (Glux). The copolyesters have inline image in the 35 000–45 000 g mol-1 range, their microstructure is random, and they start to decompose at a temperature well above 300 °C. Crystallinity of PHT is repressed by copolymerization so that copolyesters containing more than 20% of sugar-based units are essentially amorphous. On the contrary, PHTxGluxy displays a Tg that increases monotonically with composition from 16 °C in PHT up to 73 °C in PHGlux. Compared with PHT, the copolyesters show an accentuated susceptibility to hydrolysis and are sensitive to the action of lipases upon incubation under physiological conditions. The degradability of PHTxGluxy increases with the content in Glux units.