主链含酰亚胺结构的聚醚醚酮的合成及其性能

以1,4-二苯氧基苯为单体分别与N,N′-(4,4′-二苯甲烷)-双-(3,4-二甲酰亚胺基苯甲酰氯)和N,N′-(4,4′-二苯砜)-双-(3,4-二甲酰亚胺基苯甲酰氯),采用低温溶液缩聚合成了2种主链含酰亚胺结构的聚醚醚酮树脂,聚合物的比浓对数粘度分别为0.98和0.61 dL/g。 用FT-IR、¹H NMR和WAXD进行了结构表征,用DSC和TGA测试了热性能。 结果表明，聚合物有较高的玻璃化转变温度(T_g分别为236和263 ℃),N₂气气氛中热分解温度(5%T_d)分别为529和512 ℃,能溶于N,N-二甲基乙酰胺、N-甲基-2-吡咯烷酮、氯仿和间甲酚等常见的有机溶剂中。

Synthesis and Properties of Poly(ether ether ketone) Containing Imide Moiety

Two novel poly ( ether ether ketone ) s ( PEEK ) containing imide moiety with inherent viscosities of 0. 98 dL/g and 0. 61 dL/g were respectively prepared by low temperature solution polycondensation from 1,4-diphenylbenzene( DPB) with N,N'-(4,4'-diphenylmethane) bistrimelletimide diacid chloride( DCDI-M) or N,N'-(4,4'-diphenylsulfone) bistrimelletimide diacid chloride( DCDI-S). The polymers were characterized by FT-IR, ~1H NMR, DSC, TGA and WAXD. The results show that the polymers are amorphous. The glass transition temperatures( T_g) are 236 ℃ and 263 ℃ , respectively. The onset temperatures taken at a 5% mass loss of each of the polymers in nitrogen atmosphere are all over 512 ℃. The polymers are soluble in common organic solvents such as N, N-dimethylacetamide ( DMAc) , TV-methylpyrrolidone (NMP), cresol and chloroform at room temperature.