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首页> 外文期刊>Polymer: The International Journal for the Science and Technology of Polymers >Synthesis and gas permeability of membranes of Poly(vinyl ether)s bearing oxyethylene segments
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Synthesis and gas permeability of membranes of Poly(vinyl ether)s bearing oxyethylene segments

机译：含氧乙烯链段的聚乙烯醚膜的合成与透气性

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Cationic copolymerizations of vinyl ether monomers [2-methoxyethyl vinyl ether: MOVE, 2-(2-methoxyethoxy)ethyl vinyl ether: MEEVE, 2-adamantyl vinyl ether: AdVE, 2-(2-vinyloxyethoxy)ethyl methacrylate: VEEM] were performed to obtain three types of vinyl ether copolymers [poly(MOVE-AdVE)s, poly(MEEVE-AdVE)s, and poly(MEEVE-VEEM)s] with different composition rates. Poly(MOVE-AdVE) and poly(MEEVE-AdVE) obtained at monomer feed ratio of 1:1 exhibited the glass transition temperatures (T _g) of 55 and 28 °C, respectively, but the T _g's of copolymers were near or lower than room temperature when the feed ratio of AdVE decreased. Poly(MOVE-AdVE)s and poly(MEEVE-AdVE) with T _g's above room temperature afforded free-standing membranes by casting them from toluene solutions. They exhibited relatively high CO _2 permeability and high CO _2/N _2 separation factors (P(CO _2) = 22-36 barrers, P(CO _2)/P(N _2) = 19-40). The T _g's of poly(MEEVE-VEEM)s were very low and around -70 °C irrespective of the difference of monomer feed ratio. Methacrylate groups in poly(MEEVE-VEEM)s partially reacted under heating to give crosslinked polymer membranes. The crosslinked membranes showed high CO _2/N _2 selectivity, especially the poly(MEEVE-VEEM) membrane possessing the highest ratio of MEEVE exhibited high CO _2 permeability and high selectivity (P(CO _2) = 120 barrers, P(CO _2)/P(N 2) = 55).
机译：进行乙烯基醚单体[2-甲氧基乙基乙烯基醚：MOVE，2-（2-甲氧基乙氧基）乙基乙烯基醚：MEEVE，2-金刚烷基乙烯基醚：AdVE，甲基丙烯酸2-（2-乙烯基氧基乙氧基）乙基酯：VEEM]的阳离子共聚。获得具有不同组成比例的三种类型的乙烯基醚共聚物[聚（MOVE-AdVE），聚（MEEVE-AdVE）和聚（MEEVE-VEEM）]。以单体进料比1：1获得的Poly（MOVE-AdVE）和poly（MEEVE-AdVE）的玻璃化转变温度（T _g）分别为55和28°C，但共聚物的T _g接近或更低。当AdVE的进料比降低时，温度高于室温。 T_g高于室温的聚（MOVE-AdVE）和聚（MEEVE-AdVE）通过从甲苯溶液中浇铸而制得独立膜。它们表现出相对较高的CO _2渗透率和较高的CO _2 / N _2分离因子（P（CO _2）= 22-36 barrers，P（CO _2）/ P（N _2）= 19-40）。聚（MEEVE-VEEM）的T _g非常低，约为-70°C，而与单体进料比的差异无关。聚（MEEVE-VEEM）中的甲基丙烯酸酯基团在加热下部分反应，生成交联的聚合物膜。交联的膜表现出高的CO _2 / N _2选择性，特别是具有最高MEEVE比率的聚（MEEVE-VEEM）膜表现出高的CO _2渗透性和高的选择性（P（CO _2）= 120 barrers，P（CO _2） / P（N 2）= 55）。

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