一种脂肪-芳香族共聚酯的降解性能  

Biodegradability of aliphatic-aromatic copolyesters

作　　者：陈锡荣[1] 祝桂香[1] 张伟[1] 闫一凡[1] 

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京市100013

出　　处：《合成树脂及塑料》2013年第1期43-47,共5页China Synthetic Resin and Plastics

摘　　要：以1,4-丁二醇、己二酸和对苯二甲酸二甲酯为原料,采用稀土催化剂,合成了不同组成的聚己二酸丁二酯和对苯二甲酸丁二酯的共聚酯。采用堆肥法,以堆肥过程中试样的失重率、单位面积失重和相对分子质量变化作为指标,考察了芳香组分摩尔分数为40%～60%共聚酯的生物降解性,利用核磁共振氢谱测试了降解前后共聚酯组成和序列结构的变化,简述了生物降解行为的作用方式。结果表明:通过在脂肪族聚酯中引入摩尔分数为40%～60%的芳香组分,所制共聚酯既具有优异的力学性能,又具有生物降解性;且随着所含芳香组分的增多,共聚酯的生物降解性变差,降解后试样的对苯二甲酸丁二酯组分增加且芳香链段的长度增加。A series of aliphatic-aromatic copolyesters poly（butylene adipate-co-butylene terephthalate） with different composition were synthesized via condensation reaction of 1,4-butanediol,adipic acid and dimethyl terephthalate in the catalysis of rare earth catalyst.The biodegradation behavior of the copolyesters with aromatic molar contents varying from 40% to 60% were investigated via compost by using changes in mass loss rate,mass loss per area and relative molecular mass as indicators.The variations in the composition and sequence structure of the copolyesters before and after degradation were tested by means of hydrogen nuclear magnetic resonance（1H-NMR）.The mode of action of the biodegradation behavior was described.The results show that the copolyesters have excellent biodegradability and mechanical properties by introducing the aromatic polyesters chains in a range of 40%-60% into aliphatic polyesters.The degradability of the copolyesters gets worse with the increase in the content of the aromatic component,and the molar fraction of butylene terephthalate rises and the length of the aromatic segment becomes longer after degradation of the samples.

关 键 词：聚酯 脂肪族 芳香族 生物降解 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]