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首页> 外文期刊>Journal of Applied Polymer Science >Star-Shaped POSS–Methacrylate Copolymers with Phenyl–Triazole as Terminal Groups, Synthesis, and the Pyrolysis Analysis
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Star-Shaped POSS–Methacrylate Copolymers with Phenyl–Triazole as Terminal Groups, Synthesis, and the Pyrolysis Analysis

机译：以苯基-三唑为末端基团的星形POSS-甲基丙烯酸酯共聚物，合成和热解分析

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摘要

Star-shaped polyhedral oligomeric silsesquioxane (POSS)–methacrylate hybrid copolymers with phenyl–triazole as terminal groups had been designed and synthesized via sequential atom transfer radical polymerization (ATRP), azidation, and phenylacetylene-terminated procedures, and the hybrid copolymers here could be denoted as POSS–(PXMA-Pytl)_8, where X can be M, B, L, and S, represented four different methacrylate monomers, such as methacrylate (MMA), butyl methacrylate (BMA), lauryl methacrylate (LMA), and stearyl methacrylate (SMA), respectively. Thermal gravimetric analysis (TGA) and in situ Fourier transform infrared spectroscopy (FTIR) were applied for studying the thermal stability and degradation mechanism, and it was found that all of the POSS–(PXMA-Cl)_8 and POSS–(PXMA-Pytl)_8 copolymers exhibited excellent thermal stabilities, which had great potential in heat-resistant material application. Different tendencies of decomposition temperatures at 5% and 10% weight loss (T_5 and T_(10)) dependent on the side-chain length and terminal group species were investigated respectively. The longer alkyl side chains of the monomers, the lower thermal stabilities, and enhanced T_5 and T_(10) were also shown with the introduction of phenyl–triazole groups instead of chlorine groups.
机译：通过顺序原子转移自由基聚合（ATRP），叠氮化和苯乙炔封端的方法设计和合成了以苯基-三唑为末端基团的星形多面体低聚倍半硅氧烷（POSS）-甲基丙烯酸酯杂化共聚物，此处的杂化共聚物可以是表示为POSS–（PXMA-Pytl）_8，其中X可以是M，B，L和S，代表四种不同的甲基丙烯酸酯单体，例如甲基丙烯酸酯（MMA），甲基丙烯酸丁酯（BMA），甲基丙烯酸月桂酯（LMA）和分别为甲基丙烯酸十八烷基酯（SMA）。用热重分析（TGA）和原位傅里叶变换红外光谱（FTIR）研究了热稳定性和降解机理，发现所有的POSS–（PXMA-Cl）_8和POSS–（PXMA-Pytl ）_8共聚物表现出优异的热稳定性，在耐热材料的应用中具有很大的潜力。分别研究了5％和10％失重时分解温度的不同趋势（T_5和T_（10）），取决于侧链长度和端基种类。通过引入苯基三唑基团而不是氯基团，还显示出单体的烷基侧链越长，热稳定性越低，T_5和T_（10）越强。

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