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Siloxane/silane-crosslinked systems from supercritical carbon dioxide: I. Fluorinated poly(ether/siloxane)s

机译:超临界二氧化碳的硅氧烷/硅烷交联体系:I.氟化聚醚/硅氧烷

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摘要

A series of new, fluorinated, silicone-containing polymers with crosslinkable units has been synthesized by hydrosilation in toluene and supercritical carbon dioxide (70 degrees C, 3000psi) using platinum-divinyltetramethyldisiloxane (Pt-DVTMS) as a catalyst. The polymers were characterized by FTIR, NMR, GPC, TGA, and DSC. The molecular weights of these polymers ranged from 9,900 to 41,000. Comparison of the properties between reactions in toluene versus supercritical carbon dioxide indicated that the green solvent is a suitable alternative for hydrosilation. The hydrolysis and thermal curing of the crosslinkable precursor polymers produced higher molecular weight polymers with thermal stabilities ranging from 347 to 417 degrees C. Copyright (C) 2007 John Wiley & Sons, Ltd.
机译:使用铂-二乙烯基四甲基二硅氧烷(Pt-DVTMS)作为催化剂,通过在甲苯和超临界二氧化碳(70摄氏度,3000psi)中进行硅氢化反应,合成了一系列具有可交联单元的新型含氟有机硅聚合物。通过FTIR,NMR,GPC,TGA和DSC对聚合物进行表征。这些聚合物的分子量为9,900至41,000。在甲苯与超临界二氧化碳中反应之间的性质比较表明,绿色溶剂是硅氢化反应的合适替代品。可交联前体聚合物的水解和热固化产生的高分子量聚合物具有347至417摄氏度的热稳定性。版权所有(C)2007 John Wiley&Sons,Ltd.

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