基于废弃PET的环氧超支化聚酯扩链剂应用性能  

Application properties of epoxy hyperbranched polyester chain extender based on waste PET

作　　者：黄炫淇 李小林 戴永斌 陈珍明[3] 李鹏 HUANG Xuanqi;LI Xiaolin;DAI Yongbin;CHEN Zhenming;LI Peng(School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Hualong Resin Co.,Ltd.,Hezhou 542899,China;Guangxi Key Laboratory of Comprehensive Utilization of Calcium Carbonate Resources,School of Materials and Chemical Engineering,Hezhou University,Hezhou 542899,China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]华砻树脂股份有限公司,广西贺州542899 [3]广西碳酸钙资源综合利用重点实验室,贺州学院材料与化学工程学院,广西贺州542899

出　　处：《工程塑料应用》2024年第10期143-150,共8页Engineering Plastics Application

基　　金：国家自然科学基金地区科学基金项目(52263005);广西科技计划项目(桂科AD23023008)。

摘　　要：以废弃聚对苯二甲酸乙二酯(PET)的降解产物为核心,制备了环氧超支化聚酯扩链剂(EHBP),探究了该扩链剂对聚对苯二甲酸-己二酸丁二酯/聚乳酸/碳酸钙(PBAT/PLA/CaCO_(3))三元复合材料微观结构、热性能、力学性能的影响。结果表明,以PET降解产物制备的EHBP对复合材料有明显的增容作用。扩链剂中的高活性环氧基团能够与PBAT和PLA上的端羧基、端羟基发生开环加成反应,形成扩链大分子以增强PBAT和PLA之间的界面相互作用。当EHBP添加量达到0.6份时,可以明显观察到两相间变得模糊、孔洞减少。缺口冲击强度由6.48 kJ/m^(2)增加到43.02 kJ/m^(2),拉伸强度由10.15 MPa增加到24.59 MPa,断裂伸长率由11.8%增加到56.72%。An epoxy hyperbranched polyester chain extender(EHBP)was prepared using the degradation products of waste polyethylene terephthalate(PET)as the core,and the effects of this chain extender on the microstructure,thermal properties,and mechanical properties of poly(butylene adipate terephthalate)/polylactic acid/calcium carbonate(PBAT/PLA/CaCO_(3))composites were investigated.The experimental results indicate that EHBP prepared from PET degradation products has a significant compatibilizing effect on the composites.The highly reactive epoxy groups in the chain extender can undergo ring-opening addition reactions with the terminal carboxyl and hydroxyl groups on PBAT and PLA,forming extended macromolecules to enhance the interfacial interaction between PBAT and PLA.When the addition of EHBP reaches 0.6 phr,it can be clearly observed that the phase boundaries become blurred,and the number of voids decreases.The notched impact strength enhances from 6.48 kJ/m^(2)to 43.02 kJ/m^(2),the tensile strength increases from 10.15 MPa to 24.59 MPa,and the elongation at break increases from 11.8%to 56.72%.

关 键 词：聚对苯二甲酸乙二酯 聚对苯二甲酸-己二酸丁二酯 聚乳酸 扩链剂 相容性 复合材料 

分 类 号：TQ322[化学工程—合成树脂塑料工业]