Novel copolyesters based on poly(alkylene dicarboxylate)s: 2. Thermal behavior and biodegradation of fully aliphatic random copolymers containing 1,4-cyclohexylene rings
Novel copolyesters based on poly(alkylene dicarboxylate)s: 2. Thermal behavior and biodegradation of fully aliphatic random copolymers containing 1,4-cyclohexylene rings
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DOI：
10.1016/j.eurpolymj.2009.04.034
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发表时间：
2009-08
影响因子：
6
通讯作者：
C. Berti;A. Celli;Paola Marchese;G. Barbiroli;Francesco Di Credico;V. Verney;S. Commereuc
中科院分区：
文献类型：
--
作者：
C. Berti;A. Celli;Paola Marchese;G. Barbiroli;Francesco Di Credico;V. Verney;S. Commereuc
脂肪族聚（1，12-十二烷二酸丁二醇酯）是一种有趣的可生物降解聚酯，具有高的热稳定性和高的结晶度，但熔融温度低。为了提高该聚合物的性能，以1，4-丁二醇为原料，加入不同摩尔比的1，12-十二烷二酸和1，4-环己烷二甲酸，合成了新型全脂肪族无规共聚酯。该共聚物具有显著的耐热降解性、随组成而变化的热性能，并保持聚（亚烷基二羧酸酯）的机械特性。特别地，含有70mol%的1，4-环己烷二羧酸酯单元的共聚物改善了聚（1，12-十二烷二酸丁二醇酯）的热性能，并且呈现出非常高的生物降解速率，高于两种母体均聚物的生物降解速率。这种行为与样品的低结晶度和非晶相的组成有关。因此，这些新颖的全脂肪族共聚物代表了一类有趣的新型共聚酯，其可以平衡良好的物理性能和高生物降解性。
Aliphatic poly(butylene 1,12-dodecanedioate) is an interesting biodegradable polyester characterized by high thermal stability and high crystallinity, but low melting temperature. In order to improve the performances of this polymer some novel fully aliphatic random copolyesters have been prepared starting from 1,4-butanediol and different molar ratio of 1,12-dodecanedioc acid and 1,4-cyclohexanedicarboxylic acid. The copolymers have a notable resistance to thermal degradation, thermal properties which vary as a function of the composition, and maintain the mechanical characteristics of the poly(alkylene dicarboxylate). In particular, the copolymer containing the 70mol% of 1,4-cyclohexanedicarboxylate units improves the thermal properties of the poly(butylene 1,12-dodecanedioate) and presents a very high biodegradation rate, higher than those of the two parent homopolymers. This behavior has been correlated to the low level of crystallinity of the sample and to the composition of the amorphous phase. Therefore, these novel fully aliphatic copolymers represent an interesting new class of copolyesters which can balance good physical properties and high biodegradability.