Enhanced Thermal Properties and Flame Retardancy of a Novel Transparent Poly(methyl methacrylate)-Based Hybrid Prepared by the Sol–Gel Method

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• 作者：Saihua Jiang ; Yuan Hu ; Zhou Gui ; Yangyang Dong ; Xin Wang ; Keqing Zhou ; Siuming Lo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：July 18, 2012
• 年：2012
• 卷：51
• 期：28
• 页码：9447-9455
• 全文大小：465K
• 年卷期：v.51,no.28(July 18, 2012)
• ISSN：1520-5045

文摘

A novel monomer, poly(ethylene glycol) monoacrylate aminopropyltriethoxysilane phenyl phosphate (SNP), containing phosphorus, nitrogen, and silicon was synthesized and then incorporated into a poly(methyl methacrylate) (PMMA) matrix through copolymerization and the sol鈥揼el method to produce organic鈥搃norganic hybrids. The chemical structure of SNP was characterized by FTIR, ¹H NMR, ²⁹Si NMR, and ³¹P NMR spectroscopies. The ²⁹Si MAS NMR results for the hybrid materials suggested the formation of cross-linked networks in the hybrids. A morphological study showed that the inorganic particles were well distributed in the PMMA matrix. The hybrids retained a high transparency and exhibited a significant improvement in glass transition temperature, thermal stability, hardness, and flame retardancy upon the incorporation of SNP into the PMMA matrix. The network structure, homogeneous distribution, and char formation during degradation were proposed as three key reasons for the improved properties.