抗氧剂对聚乙醇酸热稳定性能的影响  

Influence of antioxidant on thermal stability of PGA

作　　者：崔爱军[1] 朱晨浩 祝龙生 薛士瀚 辛健[1] 韦梅俊 何明阳[1] 陈群[1] Cui Aijun;Zhu Chenhao;Zhu Longsheng;Xue Shihan;Xin Jian;Wei Meijun;He Mingyang;Chen Qun(Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,Key Laboratory of Green Catalytic Materials and Technology,Changzhou University,Changzhou 213164)

机构地区：[1]江苏省先进催化与绿色制造协同创新中心常州大学绿色催化材料与技术重点实验室

出　　处：《化工新型材料》2019年第8期197-200,共4页New Chemical Materials

基　　金：国家自然科学基金(21676030)

摘　　要：采用添加抗氧剂的方法提高聚乙醇酸(PGA)在二次加工中的热稳定性,通过热重分析、相对分子质量测定、黄度指数测试、力学性能测试等手段,最终确定主抗氧剂2246添加量为2mg/g、辅助抗氧剂THP-24添加量为8mg/g且主辅抗氧剂联合使用时,效果最佳。与未添加抗氧剂的PGA相比,添加复合抗氧剂的PGA样品,其起始降解温度从275℃提高到318℃,相对分子质量保留率由64.02%提高到83.15%,黄度指数从17.23降到10.92,拉伸强度由61.30MPa提高到91.80MPa。Antioxidants were used to improve the thermal stability of the PGA in the process of processing.Though TG,molecular weight determination,yellow degree determination,the main antioxidant of antioxidant 2246 adding amount was 2mg/g(PGA),antioxidants THP-24 as auxiliary antioxidant 2mg/g(mass fraction)were ultimately determined,to achieve the best results.T5%raised temperature from 275℃to 318℃,the molecular weight retention also increased from 64.02%to 83.15%,the yellow index also dropped from 17.23 to 10.92.The tensile strength increased from 61.30MPa to 91.80MPa.

关 键 词：聚乙醇酸 热稳定性 抗氧剂 

分 类 号：TQ3[化学工程]