阻燃剂的层状受限分布实现聚碳酸酯/聚对苯二甲酸丁二醇酯共混物性能同步增强  

Restricted Distribution of Flame Retardants in Polycarbonate/Polybutylene Terephthalate Alternating Layered Blends to Improve Simultaneously the Mechanical and Flame-Retardant Properties

作　　者：向阳[1] 程慧强 吴宏[1] 郭少云[1] Yang Xiang;Huiqiang Cheng;Hong Wu;Shaoyun Guo(State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology,Chengdu 610065,China)

机构地区：[1]高分子材料工程国家重点实验室(四川大学)四川大学高分子研究所四川省橡塑材料复合成型技术工程实验室,四川成都610065

出　　处：《高分子材料科学与工程》2024年第9期92-99,共8页Polymer Materials Science & Engineering

基　　金：企业合作项目(22H1159)。

摘　　要：聚碳酸酯/聚对苯二甲酸丁二醇酯(PC/PBT)共混物具有高表面硬度、高耐热性和耐化学性,在汽车、建筑、电子电器等领域应用广泛。但PC和PBT在阻燃体系上的差异导致共混物阻燃改性效率较低,阻燃性能较差,难以实现阻燃和力学性能的同步增强。文中采用层叠复合挤出加工制备了PC/PBT交替层状共混物,调控不同阻燃剂在交替层状共混物基体中的层状受限分布,实现了共混物阻燃性能大幅提高的同时力学性能同步增强,成功解决了PC/PBT传统共混物在高阻燃和高强度、高韧性间的矛盾。研究表明,交替层状共混物的拉伸强度和缺口冲击强度分别达到了48.1 MPa和15.8 kJ/m2,相较传统共混物分别提高了139.7%和89.7%,而且其阻燃等级达到了UL-94 V-0(1.5 mm),峰值放热率降低了11.2%。To deal with the potential fire risk,it is inevitable for flame retardancy of PC/PBT.However,the flame retardant efficiency in PC/PBT blends is unsatisfactory due to the discrepancy in selection of flame retardant for PC and PBT.In this work,PC/PBT alternating layered blends with the restricted distribution of flame retardants were successfully prepared via co-extrusion technology to improve the mechanical and flame-retardant properties simultaneously.The restricted distribution of flame retardants addresses the contradiction between high flame-retardant performance and high strength as well as high toughness in traditional PC/PBT blends.The PC/PBT alternating layered blends exhibit excellent tensile strength(48.1 MPa)and impact strength(15.8 kJ/m2),achieving improvements of 139.7%and 89.7%,respectively,compared to traditional blends.The flame-retardant grade of the alternating layered blends can easily achieve UL94 V0@1.5 mm,with a decrease of 11.2%in peak heat release rate(PHRR).This work provides a novel strategy for the design and fabrication of flame-retardant PC/PBT blends with high-performance.

关 键 词：聚碳酸酯 聚对苯二甲酸丁二醇酯 共混物 阻燃 受限分布 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]