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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/44188


    Title: Nucleophilic Cleavage of Crosslinked Polysiloxanes to Cyclic Siloxane Monomers: Mild Catalysis by a Designed Polar Solvent System
    Authors: 張正良;Chang, Cheng-liang;Lee, Howard Shih-jen;Chen, Cheng-kwo
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: alcoholysis;aminolysis;base catalyst;polydimethylsiloxane networks
    Date: 2005-12-01
    Issue Date: 2010-03-09 10:01:29 (UTC+8)
    Publisher: Springer
    Abstract: 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.
    Relation: Journal of Polymer Research 12(6), pp.433-438
    DOI: 10.1007/s10965-004-1871-1
    Appears in Collections:[化學工程與材料工程學系暨研究所] 期刊論文

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