期刊
POLYMERS
卷 6, 期 1, 页码 105-113出版社
MDPI
DOI: 10.3390/polym6010105
关键词
ablation; glass fiber-reinforced composite; phenolic resin (PR); silica sol; silsesquioxanes; MPMS; GPMS; TEOS; DGEBA
资金
- Aerospace Supporting Fund [GN: 2012-HT-HGD-11]
- Invitation of Foreign Experts Program of the Chinese Foreign Experts Bureau [GN: GDW20122300078]
- Natural Science Foundation of HLJ Province [GN: ZD20080201]
- Excellent Youth Foundation of HLJ Province [GN: JC200902]
- 9th One-Thousand Expert Plan of The Organization Ministry of the Central Government, China [WQ20122300100]
Functionalized silica sols were obtained by the hydrolytic condensation of (gamma-methacryloxypropyl) trimethoxysilane (MPMS), (gamma-glycidyloxypropyl) trimethoxysilane (GPMS) and tetraethoxysilane (TEOS). Three different sols were obtained: MPS (derived from MPMS and TEOS), GPS-MPS (derived from GPMS, MPMS and TEOS), and GPSD (derived from GPMS, TEOS and diglycidyl ether of bisphenol A, DGEBA). These silica sols were mixed with a phenolic resin (PR). Ethylenediamine was used as a hardener for epoxy-functionalized sols and benzoyl peroxide was used as an initiator of the free-radical polymerization of methacrylate-functionalized silica sols. Glass fiber-reinforced composites were obtained from the neat PR and MPS-PR, GPS-MPS-PR and GPSD-PR. The resulting composites were evaluated as ablation resistant materials in an acetylene-oxygen flame. A large increase in the ablation resistance was observed when the PR was modified by the functionalized silica sols. The ablation resistance of the composites decreased as follows: GPSD-PR > MPS-PR > GPS-MPS-PR > PR.
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