AN INVESTIGATION OF THE HIGH GAS-PERMEABILITY OF POLY (1-TRIMETHYLSILYL-1-PROPYNE)
AN INVESTIGATION OF THE HIGH GAS-PERMEABILITY OF POLY (1-TRIMETHYLSILYL-1-PROPYNE)
复制标题
DOI：
10.1016/s0376-7388(00)80017-4
复制
发表时间：
1987-11-01
影响因子：
9.5
通讯作者：
NAKAGAWA, T
中科院分区：
文献类型：
--
作者：
ICHIRAKU, Y;STERN, SA;NAKAGAWA, T
在环境温度下，聚（1-三甲基硅基-1-丙炔）（PMSP）对轻气体的渗透性高于任何其他无孔合成聚合物。 PMSP 在这些温度下处于玻璃状聚合物状态。测定了 PMSP 中 N2、O2、CH4 和 CO2 的渗透性、扩散性和溶解度系数，并与聚（二甲基硅氧烷）中这些气体的报告值进行比较。 PMSP 较高的透气性主要是由于其较高的气体溶解度，而这又似乎是由于这种玻璃状聚合物的非松弛（朗缪尔）域中存在较大的“过量”自由体积。 PMSP 的结构由相对刚性的主链组成，主链由庞大的三甲基甲硅烷基侧基隔开，这可能是造成这种大自由体积的原因。
The permeability of poly (1–trimethylsilyl–1−propyne), PMSP, to light gases is higher than that of any other nonporous synthetic polymer at ambient temperatures. PMSP is in the glassy polymer state at these temperatures. Permeability, diffusion, and solubility coefficients were determined for N2, O2, CH4, and CO2in PMSP, and are compared with values reported for these gases in poly (dimethyl siloxane). The higher gas permeability of PMSP results primarily from a substantial gas solubility, which appears to be due, in turn, to a large “excess” free volume in the unrelaxed (Langmuir) domains of this glassy polymer. The structure of PMSP, which consists of relatively rigid backbone chains separated by bulky trimethylsilyl side groups, probably is responsible for this large free volume.