四元共聚热塑性聚酰亚胺的合成与表征  

Synthesis and Characterization of Quaternary Copolymerized Thermoplastic Polyimide

作　　者：曹贤武[1] 韦创 何光建[1] 文江维 CAO Xianwu;WEI Chuang;HE Guangjian;WEN Jiangwei(Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing∥National Engineering Research Center of Novel Equipment for Polymer Processing∥The Key Laboratory of Polymer Processing Engineering of Ministry of Education,South China University of Technology,Guangzhou 510640,Guangdong,China)

机构地区：[1]华南理工大学广东省高分子先进制造技术及装备重点实验室∥聚合物新型成型装备国家工程研究中心∥聚合物加工工程教育部重点实验室,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2020年第4期73-79,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家重点研发计划项目(2016YFB0302000)。

摘　　要：为了提高聚酰亚胺的热塑性,制备兼具优异热塑性与耐热性的聚酰亚胺材料,以均苯四甲酸二酐(PMDA)与3,3′,4,4′-联苯四羧酸二酐(s-BPDA)为二酐、4,4′-二氨基二苯醚(ODA)与2,2′-二[4-(4-氨基苯氧基)苯基]丙烷(BAPP)为二胺,通过两步法成功制备了一系列四元共聚热塑性聚酰亚胺,并研究了刚性联苯基团与柔性单体、侧甲基的协同作用对聚酰亚胺材料性能的影响。利用FTIR、XRD、DMA和TGA等测试手段对材料的分子结构、热塑性和耐热性等进行了表征。结果表明:该系列四元共聚聚酰亚胺具有良好的热塑性与耐热性,其中当二酐与二胺的摩尔分数比(PMDA∶s-BPDA∶ODA∶BAPP)为70∶30∶70∶30时,该材料表现出优异的热塑性和耐热性,同时在非质子极性溶剂中表现出较好的溶解性,极大地提高了聚酰亚胺在溶剂或熔融状态下的加工性能。In order to improve the thermoplasticity of polyimide, a series of novel quaternary copolymerized poly-imide materials were successfully synthesized by two-step method with 1,2,4,5-benzenetetracarboxylic anhydride(PMDA) and 3,3′,4,4′-biphenyltetracarboxylic dianhydride(s-BPDA) as dianhydride, 4,4′-oxydianiline(ODA) and 2,2-bis[4-(4-aminophenoxy)phenyl] propane(BAPP) as diamine. The synergistic effect of rigid biphenyl groups with flexible monomers and pendant methyl groups on the properties of polyimide was studied.The molecular structure, thermoplasticity and heat resistance of the polyimides were characterized by FTIR, XRD, DMA, TGA and other testing methods. The results show that the series of quaternary copolymerized polyimides have good thermoplasticity and heat resistance. Particularly, when the molar fraction ratio of PMDA ∶s-BPDA ∶ODA ∶BAPP is 70 ∶30 ∶70 ∶30, the polyimide exhibits excellent thermoplasticity and heat resistance. What’s more, its good solubility in aprotic polar solvent can greatly improve the processing properties of the polyimide in a solvent or molten state.

关 键 词：热塑性聚酰亚胺 四元共聚 BAPP 热稳定性 

分 类 号：TQ322.3[化学工程—合成树脂塑料工业]