Nucleophilic Cleavage of Crosslinked Polysiloxanes to Cyclic Siloxane Monomers: Mild Catalysis by a Designed Polar Solvent System

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/44188

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题名:	Nucleophilic Cleavage of Crosslinked Polysiloxanes to Cyclic Siloxane Monomers: Mild Catalysis by a Designed Polar Solvent System
作者:	張正良;Chang, Cheng-liang;Lee, Howard Shih-jen;Chen, Cheng-kwo
贡献者:	淡江大學化學工程與材料工程學系
关键词:	alcoholysis;aminolysis;base catalyst;polydimethylsiloxane networks
日期:	2005-12-01
上传时间:	2010-03-09 10:01:29 (UTC+8)
出版者:	Springer
摘要:	The solvent effect on the cyclic compound formation in the base-catalyzed aminolysis reaction of room temperature vulcanized polydimethylsiloxane networks under ambient temperature was investigated. The complete dissolution time of the silicone rubber in the less polar solvent system was longer which is attributed to the internal diffusion resistance for the penetration of the activated nucleophiles in the inherent hydrophobic polysiloxane networks. The main products were cyclic oligomers in the polar solvent systems. The reaction rate of aminolysis was proved to be faster than that of alcoholysis with the aid of a model compound under the reaction conditions designed.
關聯:	Journal of Polymer Research 12(6), pp.433-438
DOI:	10.1007/s10965-004-1871-1
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

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