Synthesis and effects of MDT silicone resin on PMPS-based ablative composites

ABSTRACT 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 mixtur...

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Bibliographic Details
Published in:Journal of applied polymer science 2015-03, Vol.132 (9), p.np-n/a
Main Authors: Mu, Qiuhong, Peng, Dan, Ju, Wei, Zhang, Fangzhi, Wang, Chengguo
Format: Article
Language:English
Subjects:
Ablation
Combustion
Materials science
Mechanical properties
Polymer matrix composites
Polymers
Resins
rubber
Silicone resins
synthesis and processing
Thermogravimetric analysis
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Summary:ABSTRACT 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. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41571.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.41571