STUDIES ON THE BLOCK COPOLYMERIZATION OF BUTADIENE AND OCTOMETHYLCYCLOTETRASILOXANE Ⅱ. CHARACTERIZATION AND GAS-SELECTIVE PERMEABILITIES OF THE BLOCK COPOLYMERS

PANG Yong-xin; LIN Shang-an

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STUDIES ON THE BLOCK COPOLYMERIZATION OF BUTADIENE AND OCTOMETHYLCYCLOTETRASILOXANE Ⅱ. CHARACTERIZATION AND GAS-SELECTIVE PERMEABILITIES OF THE BLOCK COPOLYMERS

Research Article | 更新时间：2021-03-19

- STUDIES ON THE BLOCK COPOLYMERIZATION OF BUTADIENE AND OCTOMETHYLCYCLOTETRASILOXANE Ⅱ. CHARACTERIZATION AND GAS-SELECTIVE PERMEABILITIES OF THE BLOCK COPOLYMERS
- Acta Polymerica Sinica Issue 2, Pages: 154-160(1995)
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- Published：20 April 1995，
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PANG Yong-xin, LIN Shang-an. STUDIES ON THE BLOCK COPOLYMERIZATION OF BUTADIENE AND OCTOMETHYLCYCLOTETRASILOXANE Ⅱ. CHARACTERIZATION AND GAS-SELECTIVE PERMEABILITIES OF THE BLOCK COPOLYMERS. [J]. Acta Polymerica Sinica (2):154-160(1995)
DOI：

PANG Yong-xin, LIN Shang-an. STUDIES ON THE BLOCK COPOLYMERIZATION OF BUTADIENE AND OCTOMETHYLCYCLOTETRASILOXANE Ⅱ. CHARACTERIZATION AND GAS-SELECTIVE PERMEABILITIES OF THE BLOCK COPOLYMERS. [J]. Acta Polymerica Sinica (2):154-160(1995) DOI：

摘要

用红外光谱、核磁共振氢谱、示差扫描量热法、凝胶色谱法、电子显微镜、Ｘ－射线衍射等现代分析测试手段对聚丁二烯一聚二甲硅氧烷嵌段共聚物，Ｐｏｌｙ（Ｄｄ－ｂ－ＤＭＳ），进行了表征，结果表明Ｐｏｌｙ（Ｂｄ－ｂ－ＤＭＳ）具有嵌段结构和微观相分离形态；研究了Ｐｏｌｙ（Ｂｄ－ｂ－ＤＭＳ）的成膜性及选择透气性，证明其具有较好的富氧性能；考察了铸膜条件、硫化条件对选择透气性的影响；初步讨论了微观结构与选择透气性的相关性．

Abstract

he block coplymers of polybutadiene and Polydimethylsiloxane

poly(Bd-b-DMS)

were critically characterized using FTIR

1H-NMR

DSC

TGA

WAXD.GPC

TEM etc. modern analytical and determing methods. Results verify that Poly(Bd-b-DMS) is block copolymers with the morpholgy of microphase separation. Studies on the membrane-forming property and gas-selective permeabilities show Poly(Bd-b-DMS) membranes properly vulcanized have good properties for oxygen enrichment. A sample containing 17.8wt % of PDMS has an oxygen permeation coeffi-cient (Po2) of 4.7×10-9cm3.cm/cm2·s·KPa and a separation coefficient (Po2/PN2)of 4.3. The dependence of permeabilities upon vulcanization time and solvents for cas-ting the membranes were investigated and the interrelation of the morphology of Poly(Bd-b-DMS) to permeabilities was also preliminarily discussed.

关键词

丁二烯八甲基环四硅氧烷嵌段共聚物聚合物表征选择透气性

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Guangzhou Institute of Chemistry, Chinese Academy of Sciences

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