有机硅类共聚物的合成、成膜及其透气性能  

Synthesis of Copolymers of Ester Contained Organic Silicon and Gas Permeabilities of their Memnranes

作　　者：苏炳禄[1] 王少莘[1] 后晓淮 陈观文[1] 

机构地区：[1]中国科学院化学研究所,北京中关村100080

出　　处：《功能高分子学报》1991年第1期49-54,共6页Journal of Functional Polymers

摘　　要：本文对聚二甲基硅氧烷(PDMS)进行了改性研究。研究了α,ω-双端羟基聚二甲基硅氧烷(Ⅱ)和乙二醇(Ⅲ)与二甲胺苄基丙二酸二乙酯(Ⅰ)共缩聚物的合成方法,成膜方法,并从电子给体-受体的观点讨论了此类膜对氧,氮气体的透过性能。结果表明,改变原料的摩尔比,用共缩聚反应可得到不同含量的(Ⅱ)和(Ⅰ)的共聚物,它们具有良好的成膜性。其氧气透过系数P_(O_2)值通常在10^(-8)[cc(STP)·cm/cm^2·s·cmHg]数量级,氧、氮气体透过系数比P_(O_2)/P_(N_2)可达2.54,并且随着电子给体化合物(Ⅰ)在共聚物中含量的增加,P_(O_2)/P_(N_2)值也随着增高。A study was made on the synthesis of copolymers by copolycondensation reaction of α,ω-dihydroxy-polydimethlsiloxane (Ⅱ) and glycol (Ⅲ) witrh diethyl-2-(N,N-dimethylaminobenzyl) malonate (Ⅰ), on their membrane preparation and from form the viewpoint of the interaction between electron accepter and donor, a discussion was made on the gas permeabilities for O_2 and N-2 through the membranes.It was shown that the copolymers can be obtained by copolycondensation; the copolymers can be prepared into dense membranes by casting the copolymer with alittle vulcanizing agent onto a glass plate. The elastomeric membranes have better mechanical strength than PDMS. The permeabilities for O_2(Po_2) are of the same order of magnitude as PDMS, the values of permeability ratio of O_2 to N_2(Po_2/P_(N_2)) through the membranes are higher (up to 2.54).

关 键 词：有机硅 共聚物 聚硅氧烷 PDMS 

分 类 号：O634.41[理学—高分子化学]