Novel poly(diphenylacetylene)s with both alkyl and silyl groups as gas permeable membranes: Synthesis, desilylation, and gas permeability
作者:Aiko Takeda、Toshikazu Sakaguchi、Tamotsu Hashimoto
DOI:10.1016/j.polymer.2010.01.022
日期:2010.3
Diphenylacetylenes having a dimethyloctylsilyl group and an alkyl group at para positions [Me2n-C8H17SiC6H4CCC6H4R; R = H (1a), i-Pr (1b), t-Bu (1c), n-Bu (1d)] and having only an alkyl group [PhCCC6H4R; R = i-Pr (1B), t-Bu (1C)] were synthesized and then polymerized with TaCl5/n-Bu4Sn catalyst to provide the corresponding poly(diphenylacetylene)s (2a, 2b, 2c, 2d, 2B, and 2C). The formed polymers afforded
在对位[Me 2 n -C 8 H 17 SiC 6 H 4 C CC 6 H 4 R; R = H(1a),i- Pr(1b),t- Bu(1c),n- Bu(1d)],仅具有烷基[PhC CC 6 H 4 R;R = i -Pr(1B),t -Bu(1C)]合成,然后与TaCl 5 / n- Bu 4 Sn催化剂聚合,得到相应的聚二苯乙炔(2a,2b,2c,2d,2B和2C)。所形成的聚合物通过从甲苯溶液浇铸而提供坚韧的自支撑膜。用三氟乙酸进行含硅膜(2a - d)的脱甲硅基反应,得到脱硅膜(3a - d)。这些膜对O 2,N 2和CO 2的渗透性被确定。所有的含硅膜都表现出几乎相同的透气性。2a – c含硅膜的去甲硅烷基化导致气体渗透率的大幅提高。在2d的脱甲硅烷基化反应中没有观察到明显的透气性增加。为了阐明去甲硅烷基化的影响,研究了聚合物膜的CO 2扩散率(D(CO 2)),CO