EMA对PBAT的扩链改性及其微孔发泡行为  

Chain Extension of Poly (butylene adipate-co-terephthalate) by Ethylene-Glycidyl Methacrylate Copolymer and Its Microcellular Foaming Behaviors

作　　者：王杰[1] 吴卫东[2] 周洪福[3,4] Wang Jie;Wu Weidong;Zhou Hongfu(Applied Chemistry Department,Yuncheng University,Yuncheng 044000,China;Key Laboratory of Beijing City on the Preparation and Processing of Novel Polymer Materials,Beijing University of Chemical Technology,Beijing 100029,China;School of Materials and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China;Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics,Beijing 100048,China)

机构地区：[1]运城学院应用化学系,山西运城044000 [2]北京化工大学新型高分子材料制备与加工重点实验室,北京100029 [3]北京工商大学材料与机械工程学院,北京100048 [4]塑料卫生与安全质量评价技术北京市重点实验室,北京100048

出　　处：《工程塑料应用》2020年第3期28-33,共6页Engineering Plastics Application

基　　金：山西省重点研发计划项目(201903D121105);塑料卫生与安全质量评价技术北京市重点实验室开放课题(BS201709)

摘　　要：为解决聚己二酸/对苯二甲酸丁二酯(PBAT)可发性差的问题,以乙烯-甲基丙烯酸甲酯共聚物(EMA)作为扩链剂对PBAT进行扩链改性。结果表明,随着EMA含量的增加,PBAT样品的特性黏度和支化度逐渐提高,说明扩链反应成功;PBAT样品的结晶温度和结晶度略有增加,结晶性能得到改善;PBAT样品的流变性能得到改善,说明样品的可发性逐步改善。然后,以氮气为物理发泡剂,通过固相发泡法制备PBAT微孔泡沫。结果表明,随着EMA含量的增加,PBAT泡沫的泡孔尺寸、泡孔密度和发泡倍率逐渐增加。随着发泡温度的升高,PBAT泡沫的泡孔尺寸和发泡倍率逐渐增大,泡孔密度稍有减小。In order to solve the problem of poor foamability of poly(butylene adipate-co-terephthalate)(PBAT),PBAT was chain extended by ethylene-glycidyl methacrylate copolymer(EMA).Results showed that as the content of EMA increased,the intrinsic viscosity and branching degree enhanced,indicating the successful chain extension;the crystallization temperature and crystallinity of PBAT rose slightly;the rheological properties of PBAT were improved,implying the good foamability.PBAT microcellular foams were prepared by solid phase foaming method using nitrogen as physical foaming agent.Results showed that the cell size,cell density and volume expansion ratio of various PBAT foams increased gradually.With the increase of foaming temperature,the cell size and volume expansion ratio of various PBAT foams increased and their cell density decreased respectively.

关 键 词：聚己二酸/对苯二甲酸丁二酯 固相发泡 扩链改性 微孔泡沫 超临界氮气 

分 类 号：TB332[一般工业技术—材料科学与工程]