A Polycarbonate/Magnesium Oxide Nanocomposite with High Flame Retardancy.
A Polycarbonate/Magnesium Oxide Nanocomposite with High Flame Retardancy.
复制标题
DOI：
10.1002/app.34574
复制
发表时间：
2012-01-15
影响因子：
3
通讯作者：
Yang, Mingshu
中科院分区：
文献类型：
--
作者：
Dong, Quanxiao;Gao, Chong;Ding, Yanfen;Wang, Feng;Wen, Bin;Zhang, Shimin;Wang, Tongxin;Yang, Mingshu
通过熔融共混法开发出一种具有高阻燃性的新型阻燃聚碳酸酯/氧化镁（PC/MgO）纳米复合材料。研究了 MgO 对阻燃性、热性能和热降解动力学的影响。有限氧指数 (LOI) 测试表明，少量的 MgO (2 wt%) 可以显着增强阻燃性 (LOI = 36.8)。热重分析结果表明，在空气和氮气气氛中，降解起始温度和最大降解速率温度均降低。表观活化能通过 Flynn-Wall-Ozawa 方法估算。将 MgO 掺入基体后，观察到热降解动力学的三个步骤，并且添加剂在除初始阶段之外的整个范围内提高了复合材料的活化能。认为MgO通过以下两个方面影响PC的阻燃性：一方面，MgO催化热氧化降解，加速燃烧表面的热防护/质量损失屏障；另一方面，填料降低了初始阶段的活化能并提高了最终阶段的热稳定性。
A new flame retardant polycarbonate/magnesium oxide (PC/MgO) nanocomposite, with high flame retardancy was developed by melt compounding. The effect of MgO to the flame retardancy, thermal property, and thermal degradation kinetics were investigated. Limited oxygen index (LOI) test revealed that a little amount of MgO (2 wt %) led to significant enhancement (LOI = 36.8) in flame retardancy. Thermogravimetric analysis results demonstrated that the onset temperature of degradation and temperature of maximum degradation rate decreased in both air and N2 atmosphere. Apparent activation energy was estimated via Flynn–Wall–Ozawa method. Three steps in the thermal degradation kinetics were observed after incorporation of MgO into the matrix and the additive raised activation energies of the composite in the full range except the initial stage. It was interpreted that the flame retardancy of PC was influenced by MgO through the following two aspects: on the one hand, MgO catalyzed the thermal-oxidative degradation and accelerated a thermal protection/mass loss barrier at burning surface; on the other hand, the filler decreased activation energies in the initial step and improved thermal stability in the final period.
登录
查看更多内容
影响因子：
1.9
作者：
Li, Linke;Wei, Ping;Su, Kenny
通讯作者：
Su, Kenny
影响因子：
6
作者：
Montaudo, G;Carroccio, S;Puglisi, C
通讯作者：
Puglisi, C
影响因子：
3
作者：
Nodera, A;Kanai, T
通讯作者：
Kanai, T
影响因子：
3
作者：
Dong, Quan-Xiao;Chen, Qian-Jin;Yang, Ming-Bo
通讯作者：
Yang, Ming-Bo
影响因子：
7.4
作者：
Li, Xiaojiang;Hayashi, Jun-ichiro;Li, Chun-Zhu
通讯作者：
Li, Chun-Zhu