Polycyclic silicone membranes. Synthesis, characterization and permeability evaluation

被引：47
|
作者：
Redondo, SUA
Radovanovic, E
Torriani, IL
Yoshida, IVP
机构：
[1] Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazil
[2] Univ Estadual Campinas, Inst Fis, BR-13083970 Campinas, SP, Brazil
来源：
POLYMER | 2001年 / 42卷 / 04期
基金：
巴西圣保罗研究基金会;
关键词：
cyclosiloxanes; hydrosilylation; membranes;
D O I：
10.1016/S0032-3861(00)00520-6
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In this work, membranes based on polycyclic silicone networks were synthesized from different cyclic siloxanes, through hydrosilylation reactions. These membranes showed good thermal stability, glass transition higher than conventional silicone networks and the absence of pores and phase segregation, with roughness surface. The nanomorphology of the materials was studied by small angle X-ray scattering. Some samples produced practically no scattering and some produced patterns that are typical of non-particulate systems. The gas permeability behavior of the membranes was investigated, showing permeability coefficients higher than those observed for some organic polymers, and selectivity coefficients higher than those found for PDMS based membranes. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1319 / 1327
页数：9
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