Abstract
Functionalized silica sols were obtained by the hydrolytic condensation of (γ-methacryloxypropyl)trimethoxysilane (MPMS), (γ-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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 105-113 |
| Number of pages | 9 |
| Journal | Polymers |
| Volume | 6 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2014 |
Keywords
- Ablation
- DGEBA
- GPMS
- Glass fiber-reinforced composite
- MPMS
- Phenolic resin (PR)
- Silica sol
- Silsesquioxanes
- TEOS
ASJC Scopus subject areas
- General Chemistry
- Polymers and Plastics