扩链条件对聚丁二酸丁二酯-共-对苯二甲酸丁二酯/滑石粉共混物性能的影响  

Effects of chain⁃extension condition on properties of poly(butylene succinate-co-terephthalate)/talc blends

作　　者：骆佳伟 周炳 王洪学 贾钦 LUO Jiawei;ZHOU Bing;WANG James H;JIA Qin(Sinopec Shanghai Research Institute of Petrochemical Technology Co,Ltd,Shanghai 201208,China)

机构地区：[1]中石化(上海)石油化工研究院有限公司,上海201208

出　　处：《中国塑料》2024年第6期1-11,共11页China Plastics

摘　　要：将一种多环氧官能团聚合物作为聚丁二酸丁二酯-共-对苯二甲酸丁二酯(PBST)的扩链剂,研究熔体反应挤出过程中的扩链条件对PBST/滑石粉共混物性能的影响。将扩链剂用量、反应温度和螺杆转速作为本研究的主要研究因素,通过方差分析寻找主要影响因素及各因素间交互作用。结果表明,扩链剂用量的影响最为显著,其次是温度,螺杆转速的影响不显著;随着扩链剂用量的增加,熔融温度和结晶温度降低,分子量、熔体黏度和热稳定性增加;同时,随着扩链剂用量的增加,改性PBST强度提高但韧性降低;响应面分析表明扩链剂用量、反应温度和螺杆转速分别为0.66%、200℃和300 r/min时扩链条件最优。A multifunctional epoxy polymer was used as a chain extender for poly(butylene succinate⁃co⁃terephthalate)(PBST),and the effects of chain extension condition on the properties of PBST/Talc(talcum powder)blends were in⁃vestigated during the melt⁃phase reactive extrusion process.The chain extender dosage,reaction temperature,and screw rotational speed were studied as main factors.The primary influence factors and their interactions were identified through an analysis of variance.The results indicated that the influence of chain extender dosage is most significant,followed with a reaction temperature,whereas the influence of screw speed is less.The melting and crystallization temperatures of PBST decreased with an increase in the chain extender dosage,and meanwhile its molecular weight,melt viscosity,and thermal stability increased.The modified PBST compounds presented an increase in the breaking stress but a decrease in the breaking strain with an increase in the chain extender dosage.Response surface analysis indicated that the optimal chain extension condition was a chain extender dosage of 0.66%,a reaction temperature of 200℃,and a screw speed of 300 r/min.

关 键 词：可生物降解聚酯 扩链剂 扩链条件 聚丁二酸丁二酯-共-对苯二甲酸丁二酯 滑石粉 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]