生物可降解导电热塑性弹性体的制备与表征  

Preparation and characterization of biodegradable conductive thermoplastic elastomers

作　　者：朱彤彤 赵博 何亦钊 郭媛媛 邓竹钧 杨正宇 金玉顺[1] ZHU Tongtong;ZHAO Bo;HE Yizhao;GUO Yuanyuan;DENG Zhujun;YANG Zhengyu;JIN Yushun(Beijing Key Laboratory of Special Elastomer Composites,School of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院新材料与化工学院特种弹性体复合材料北京市重点实验室,北京102617

出　　处：《弹性体》2022年第6期1-5,共5页China Elastomerics

基　　金：国家自然基金项目(52073033);北京市大学生科研训练项目(2020J00069,2018J00093)。

摘　　要：以端羟基封端聚丁二烯(PB-OH)为大分子引发剂,引发丙交酯的开环聚合制备了聚乳酸-聚丁二烯嵌段共聚物热塑新弹性体TPE(PLA-b-PB-b-PLA),然后采用原位乳液聚合法制备了PLA-b-PB-b-PLA/聚苯胺(PANI)导电热塑性弹性体,并采用红外光谱、核磁共振氢谱、凝胶渗透色谱、差示扫描量热仪、热重分析仪、透射电子显微镜、四探针测试仪进行了测定。结果表明,聚丁二烯(PB)与聚乳酸(PLA)的质量比近似为1∶2时,PLA-b-PB-b-PLA共聚物的相对分子质量较高,玻璃化转变温度(T_(g))低于10℃,在室温下具有较好的弹性;而PLA-b-PB-b-PLA/PANI复合物呈现不规则孔结构的棒状分布,电阻率为1.40Ω·m,具有较好的导电性能。In this paper,poly(lactic acid)-poly(butadiene)block copolymer thermoplastic new elastomer(PLA-b-PB-b-PLA)was prepared by initiating the ring-opening polymerization of lactide using hydroxyl-ended poly(butadiene)(PB-OH)as a macromolecular initiator,followed by in situ emulsion polymerisation to prepare PLA-b-PB-b-PLA/PANI conductive thermoplastic elastomer,which was measured by FT-IR,^(1)H-NMR,GPC,DSC,TG,TEM and four-probe tester.The results show that the PLA-b-PB-b-PLA copolymer has a high molecular weight with T_(g) below 10℃and good elasticity at room temperature when the mass ratio of polybutadiene(PB)to poly(lactic acid)(PLA)is approximately 1∶2,while the PLA-b-PB-b-PLA/PANI complex shows a rod-like distribution with irregular pore structure and a resistivity of 1.40Ω·m,which has good electrical conductivity.

关 键 词：生物降解 热塑性弹性体 导电高分子 复合物 

分 类 号：TQ322[化学工程—合成树脂塑料工业]