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．
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 coefficient (P.:) of 4.7 ×10-9cm3.cm/cm2.s.KPa and a separation coefficient (PO2/PN2) of4.3. The dependence of permeabilities upon vulcanization time and solvents for casting the membranes were investigated and the interrelation of the morphology ofPoly(Bd-b-DMS) to permeabilities was also preliminarily discussed.
出处
《高分子学报》
CSCD
北大核心
1995年第2期154-160,共7页
Acta Polymerica Sinica
基金
国家教委博士点基金
关键词
丁二烯
甲基环四硅氧烷
嵌段共聚物
选择透气性
Butadiene
Octomethylcyclotetrasiloxane
Block copolymer
Polymer characterization
Gas-selective permeability
