侧链
吸附
渗透
增塑剂
聚合物
嬉戏
化学工程
高分子化学
膜
材料科学
气体扩散
化学
有机化学
聚合
吸附
燃料电池
复分解
工程类
生物化学
作者
Sharon Lin,Kayla R. Storme,You-Chi Mason Wu,Francesco M. Benedetti,Timothy M. Swager,Zachary P. Smith
标识
DOI:10.1016/j.memsci.2022.121194
摘要
Polymers of intrinsic microporosity (PIMs) are traditionally formed from ladder backbones, but recent synthetic advances have allowed for the formation of non-traditional PIMs using a poly(ladder) motif, whereby rigid PIM-like sidechains are appended onto more flexible backbones. The effect of side-chain length on free volume and gas transport properties was recently evaluated for a methoxy-functionalized poly(ladder) (OMe-ROMP). In this study, we elaborate on the role of side-chain length and its influence on mixed-gas performance and plasticization stability for OMe-ROMP. Pure-gas sorption results are also reported, including hysteresis effects from CO 2 conditioning. Taken together, this study reveals the role of side-chain length on gas sorption, diffusion, and plasticization for CO 2 /CH 4 separations. We conclude that the length of a rigid side chain in the poly(ladder) motif is a valuable structural parameter to control sorption, diffusion, and stability towards plasticization for gas separation membrane materials. • Plasticization resistance on OMe-functionalized ROMP polymers was studied. • Increasing side-chain length on polymers led to increased gas sorption. • Mixed-gas CO 2 /CH 4 permeation tests showed increasing plasticization resistance with side-chain length.
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