Physical properties of a high molecular weight hydroxyl-terminated polydimethylsiloxane modified castor oil based polyurethane/epoxy interpenetrating polymer network composites |
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Authors: | Shoubing Chen Qihua Wang Tingmei Wang |
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Institution: | (1) State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China;(2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China |
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Abstract: | A series of polyurethane (PU)/epoxy resin (EP) graft interpenetrating polymer network (IPN) composites modified by a high
molecular weight hydroxyl-terminated polydimethylsiloxane (HTPDMS) were prepared. The effects of HTPDMS content on the phase
structure, damping properties and the glass transition temperature (Tg) of the HTPDMS-modified PU/EP IPN composites were studied by scanning electron microscopy (SEM) and dynamic mechanical analysis
(DMA). Thermogravimetric analysis (TGA) showed that the thermal decomposition temperature of the composites increased with
the increase of HTPDMS content. The tensile strength and impact strength of the IPN composites were also significantly improved,
especially when the HTPDMS content was 10%. The modified IPN composites were expected to be used as structural damping materials
in the future. |
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Keywords: | |
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