标题：Synthesis and Effects of MDT Silicone Resin on PMPS-Based Ablative Composites
作者：Mu, Qiuhong;Peng, Dan;Ju, Wei;Zhang, Fangzhi;Wang, Chengguo
作者机构：Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Shandong, Peoples R China;Shandong Acad Sci, New Mat Res Inst, Jinan 250014
来源：Journal of Applied Polymer Science
关键词：mechanical properties;resins;rubber;synthesis and processing;thermogravimetric analysis
摘要：A novel methylphenyl silicone resin, with M, D, and T units, was synthesized by cohydrolysis and cocondensation method from dimethyldimethoxysilane (Me2Si(OMe)(2)), phenyltrimethoxysilane (PhSi(OMe)(3)), hexamethyldisiloxane, and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane in toluene/water mixture catalyzed by hydrochloric acid and trifluoromethanesulfonic acid. The vinyl end-capped MDT silicone resins were chosen for reinforcement filler to enhance the mechanical properties of silicone-based ablative composites. The effects of resins with various R/Si ratios, vinyl content, and loadings on mechanical properties of PMPS rubbers were investigated. It was revealed that on the premise of good fluidity and processing performance, MDT resin showed excellent reinforcing effect and thermal stability compared with silica. MDT reinforced ablative composite showed satisfactory mechanical and antiablative properties. The linear ablation rate was 0.01 mm/s, which maybe associated with high yield of charred residue in thermogravimetric analysis results. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41571.