苯乙炔苯酐型热固性聚酰亚胺的合成与表征  

Synthesis and Characaterization of Polyimide Terminated with Phenylethynylphthalic Anhydride

作　　者：付美玲[1] 肖继君[2] 张晓蕾 周海军 李彦涛 孙慧媛[1] 

机构地区：[1]河北工业大学,天津300130 [2]河北科技大学,河北石家庄050018 [3]河北省能源研究所,河北石家庄050081

出　　处：《塑料工业》2008年第1期7-9,共3页China Plastics Industry

摘　　要：以4-溴代苯酐为原料,二(三苯基膦)二氯化钯为催化剂,三苯基膦为配体,三乙胺为反应副产物吸收剂,在非质子性溶剂N,N-二甲基乙酰胺中与苯乙炔进行交叉偶联反应,制得4-苯乙炔苯酐,然后以其为封端剂制备了聚酰亚胺;对苯乙炔苯酐及其封端的聚酰亚胺进行了结构及性能的表征。结果表明,用苯乙炔苯酐封端的聚酰亚胺,交联后薄膜的最高拉伸强度和最大断裂伸长率分别为112.9MPa和20.7%,聚酰亚胺薄膜的玻璃化转变温度和5%的热分解温度分别为313.1℃和550.0℃。4-phenylethynylphthalic anhydride （4-PEPA） was synthesized via the palladium catalyzed crosscoupling reaction of 4-bromophthalic anhydride and phenylacetylene in the presence of his （triphenylphosphine） palladium dichloride as catalyst, triphenylphosphine as ligand, triethylamine as absorbent and dimethylacetamide as the solvents. The prepared 4-phenylethynylphthalic anhydride was then used end capping agent to prepare polyimide. The structure and properties of 4-PEPA and the PI end-capped with 4-PEPA were characterized by means of FT-IR, elemental analysis, DSC and thermogravimetric analysis. The results indicated the maximum tensile strength and elongation at break of the cured film of the PI end-capped with 4-PEPA were 112.9MPa and 20.7% respectively after curing. The glass transition temperature and the temperature of 5 wt% thermal weight loss were 313.1 ℃ and 550.0 ℃ respectively.

关 键 词：4-溴代苯酐 苯乙炔苯酐 封端剂 聚酰亚胺 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]