通过自由基共聚合反应,合成了一系列不同分子量、不同乙烯基吡啶基的聚(甲基丙烯酸丁酯+(4-乙烯基)吡啶)共聚物,并以低真空度法测试了其氧氮渗透性能。结果表明,随着共聚物膜中乙烯基吡啶含量的增加,共聚物膜的密度、玻璃化转变温度及氧氮选择性都随之增加,但氧氮渗透率和扩散系数、溶解度系数却相应下降。
A series of poly(butyl methacrylate-co-(4-vinyl)pyridine)s with varied molecular weight and 4-vinyl pyridine content were synthesized using free radical copolymerization, and the gas permeation behaviors in copolymer membranes were measured using a low-vacuum permeation apparatus . It shows that the density, Tg and oxygen／nitrogen selectivity of the copolymer membranes are increased, but the oxygen and nitrogen permeability, diffusion coefficients and solubility coefficients in the copolymer membranes are reduced with the increase of the 4-vinyl pyridine content in copolymers.
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