Enhanced Thermal Properties and Flame Retardancy of a Novel Transparent Poly(methyl methacrylate)-Based Hybrid Prepared by the Sol–Gel Method
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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DOI：
10.1021/ie300803c
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发表时间：
2012-07
影响因子：
4.2
通讯作者：
Saihua Jiang;Yuan Hu;Z. Gui;Yangyang Dong;Xin Wang;K. Zhou;S. Lo
中科院分区：
文献类型：
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作者：
Saihua Jiang;Yuan Hu;Z. Gui;Yangyang Dong;Xin Wang;K. Zhou;S. Lo
合成了一种含磷、氮、硅的新型单体聚乙二醇单丙烯酸氨基丙基三乙氧基硅烷苯基磷酸（SNP），并通过共聚和溶胶-凝胶法制备了聚甲基丙烯酸甲酯（PMMA）基体，制备了有机-无机杂化物。通过FTIR、1H NMR、29Si NMR和31P NMR表征了SNP的化学结构。杂化材料的29Si MAS NMR结果表明，杂化材料中形成了交联网络。形态学研究表明，无机颗粒在PMMA基体中分布良好。在PMMA基体中掺入SNP后，杂种材料保持了高透明度，并在玻璃化转变温度、热稳定性、硬度和阻燃性方面有了显著改善。网状结构、均匀分布和降解过程中炭的形成是性能改善的三个关键原因。
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–gel method to produce organic–inorganic 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.