尿素共聚改性聚己二酸丁二醇酯及其性能  

Properties of PBA Modified by Copolymerization with Urea

作　　者：刘跃军[1] 谢伟[1] 刘亦武[1] 范淑红[1] 刘磅[1] 

机构地区：[1]湖南工业大学包装新材料与技术重点实验室,湖南株洲412007

出　　处：《高分子材料科学与工程》2013年第2期173-177,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(10972076);湖南省科技计划项目(2010FJ4127);湖南省高校创新平台开放基金(10K019)

摘　　要：以己二酸和1,4-丁二醇为原料,通过酯化反应合成了聚己二酸丁二醇酯(PBA),再用尿素与其通过高温熔融缩聚反应合成了己二酸-丁二醇-尿素共聚物。考察了尿素含量对共聚物热稳定性、结晶性能、吸水率和降解性能的影响。利用红外光谱(IR)、核磁共振谱(NMR)、凝胶渗透色谱(GPC)、热重分析(TG)和差示扫描量热分析(DSC)对聚合物进行了表征。结果表明,当丁二醇和尿素总量与己二酸的物质的量比n(丁二醇+尿素)∶n(己二酸)为1.16∶1,丁二醇和尿素的物质的量比n(1,4-丁二醇)∶n(尿素)为5∶1时,共聚物的重均分子量(-Mw)约为1×104,对比PBA,共聚物的热稳定性、吸水率和降解性能等有明显的提高。An adipic acid-1,4-butanediol copolymer （PBA） was synthesized by esterification reaction using adipic acid and 1, 4-butanediol as the raw materials. Then, using PBA and urea as reactive materials, a biodegradable polyester, adipic acid 1, 4-butanediol urea copolymer, was synthesized by high-temperature melt polycondensation. The influences of urea on the copolymer thermostability, crystallization, water absorption and degradation properties were investigated. The structure and properties of the copolymer were characterized by Fourier transform infrared （FT-IR）, ~H-NMR spectrum, gel permeation chromatography （GPC）, thermogravimetric analysis （TG） and differential scanning calorimetry （DSC）. The results show that with the proper molar ratio （ n （1,4-butanediol and urea）/n （adipic acid） = 1.16 ： 1, and n （1,4-butanediol）/n （urea） = 5 ： 1 ）, the weight average molecular weight （Mw） of adipic acid 1,4- butanediol urea copolymer was approximately 1 × 10^4. Compared with PBA, the thermal stability, water absorption and degradation performance of this copolymer are improved significantly.

关 键 词：尿素 己二酸丁二醇酯 共聚改性 降解 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]