含咪唑酮结构聚芳醚砜共聚物的制备与表征

doi:10.11944/j.issn.1000-0518.2017.06.160381

摘要/Abstract

摘要：

通过共聚的方法在酚酞聚芳醚砜(PES-C)的主链上引入苯并咪唑酮和5,6-二甲基苯并咪唑酮结构,制备了一系列苯并咪唑酮和5,6-二甲基苯并咪唑酮结构含量不同的高玻璃化转变温度(T_g)聚芳醚砜共聚物。利用核磁共振谱(NMR)、傅里叶变换红外光谱仪(FTIR)、热重分析仪(TGA)等技术手段表征了三元共聚物的结构和性能。结果表明,聚芳醚砜共聚物为无定型结构。聚合物具有优异的热性能,并且均呈现出单一的T_g(T_g>271 ℃);随着苯并咪唑酮和5,6-二甲基苯并咪唑酮的摩尔分数的增加,聚合物T_g呈现规律性升高,分别从270 ℃升高到340和344 ℃。两种共聚物均能够溶于极性非质子N,N-二甲基甲酰胺(DMF)、N,N-二甲基乙酰胺(DMAc)、二甲基亚砜(DMSO)、N-甲基吡咯烷酮(NMP)及氯仿(CHCl₃)等溶剂中。具有很好的溶解加工性和成膜性,可以进行溶液加工制备韧性的薄膜。

关键词: 聚芳醚砜, 苯并咪唑酮, 酚酞, 共聚物, 无定型

Abstract:

A series of different content of benzimidazolone and 5,6-dimethyl-2-benzimidazolone poly(aryl ether sulfone) copolymers with side groups were synthesized by copolymerization on the basis of poly(aryl ether sulfone) with cardo group(PES-C). The structures and properties of the copolymers were characterized by nuclear magnetic resonance spectroscopy(NMR), Fourier transform infrared spectrometer(FTIR), thermal gravimetric analyzer(TGA) and so on. The resulsts show that poly(aryl ether sulfone) copolymers are amorphous. The copolymers exhibit good heat resistance, and present a single glass transition temperature(T_g>271 ℃), when the mole fraction of benzimidazolone and 5,6-dimethyl-2-benzimidazolone increases, the copolymer glass transition temperature rises, ranging from 270 ℃ to 318 ℃ and 314 ℃, respectively. At the same time, the copolymers have good thermal stability. These copolymers have good solubility in N,N-dimethyl formamide(DMF), N,N-dimethylacetamide(DMAc), dimethyl sulfoxide(DMSO), N-methyl pyrrolidone(NMP) which are the commonly polar aprotic solvents, and trichloromethane(CHCl₃). Based on good solution processability and film-forming properties, the toughness thin film can be prepared by solution preparation.

Key words: poly(aryl ether sulfone), benzimidazolone, phenolphthalein, copolymer, amorphous form

杨玉, 王志鹏, 王红华, 周光远, 朱晓飞. 含咪唑酮结构聚芳醚砜共聚物的制备与表征[J]. 应用化学, 2017, 34(6): 623-630.

YANG Yu, WANG Zhipeng, WANG Honghua, ZHOU Guangyuan, ZHU Xiaofei. Preparation and Characterization of Poly(aryl ether sulfone) Copolymers Containing Imidazolyl Group[J]. Chinese Journal of Applied Chemistry, 2017, 34(6): 623-630.

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