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Synthesis of allyl‐ended hyperbranched organic silicone resin by halloysite‐supported platinum catalyst
Author(s) -
Zhang Daohong,
Huo Wenjun,
Wang Jing,
Li Tingcheng,
Cheng Xinjian,
Li Jinlin,
Zhang Aiqing
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.36658
Subject(s) - halloysite , hydrosilylation , catalysis , materials science , platinum , fourier transform infrared spectroscopy , silicone resin , disiloxane , polymer chemistry , silicone , chemical engineering , chemistry , composite material , organic chemistry , coating , engineering
Abstract A novel allyl‐ended hyperbranched organic silicone resin (AHSR) was prepared successfully by hydrosilylation between phenyltriallylsilane and 1,1,3,3‐tetramethyl disiloxane with halloysite‐supported platinum (Pt–halloysite) as the catalyst. The chemical structure of the AHSR was characterized by 1 H‐NMR and Fourier transform infrared spectroscopy, and its molecular weight was determined by matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry. The Pt–halloysite catalyst was prepared from chloroplatinic acid and halloysite by the simple wet impregnation method. The transmission electron micrographs of the catalyst showed that the platinum dispersed homogeneously into the halloysite nanotubes. Compared with the traditional homogeneous Speier and Karstedt catalysts, our heterogeneous Pt–halloysite catalyst demonstrated a higher catalytic activity, which was confirmed by IR monitoring of the attenuation of the SiH stretching band. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012