Chen Zhi, Du Jianxin, Li Xiangmei, Xie Zhili, Wang Yan, Wang Huiping, Zheng Jiechang, Yang Rongjie
School of Materials Science and Engineering, Beijing Institute of Technology, National Engineering Research Centre of Flame Retardant Material Beijing 100081 China
SAMR Defective Product Administrative Centre Beijing 100088 China.
RSC Adv. 2019 Aug 12;9(43):24935-24941. doi: 10.1039/c9ra04027g. eCollection 2019 Aug 8.
The failure behavior of red phosphorus flame retardant electrical connectors was investigated by their thermal degradation, changes of surface morphology and elements under an accelerating environmental experiment. The results showed that the nylon electrical connector degraded and cracks were generated on the surface. The temperature of maximum weight loss rate was advanced in the thermogravimetric analysis and the third weight loss peaks appeared after 28 days. The relative atomic content of O and P increased from 0 day to 28 days. The chemical environment of C changed. Partially, C-C bonds broke and became C-O bonds. The release of phosphine increased and this further oxidized to an acid with P[double bond, length as m-dash]O and P-O groups in a warm and humid environment.
通过加速环境试验下红磷阻燃电连接器的热降解、表面形貌和元素变化，研究了其失效行为。结果表明，尼龙电连接器发生降解，表面产生裂纹。热重分析中最大失重速率温度提前，28天后出现第三个失重峰。从第0天到第28天，O和P的相对原子含量增加。C的化学环境发生变化。部分C-C键断裂，形成C-O键。磷化氢的释放增加，在温暖潮湿的环境中进一步氧化为含有P=O和P-O基团的酸。
