摘要
研究自制助烧剂与阻燃剂云母粉和玻璃粉并用对硅橡胶物理性能和阻燃性能以及烧蚀后外观形貌和残质量率的影响。结果表明:助烧剂促进云母粉的烧结,云母粉/玻璃粉/助烧剂并用体系(并用比4/1/1)的烧结效果优于云母粉/玻璃粉并用体系(并用比2/1)和云母粉/助烧剂并用体系(并用比2/1);云母粉/玻璃粉/助烧剂并用体系的加入降低了硅橡胶的拉伸性能,但促进了硅橡胶在高温下能快速形成相结构均一、致密、连续、表面细腻和光滑的陶瓷化硬壳,其可阻隔热和氧进入硅橡胶内部,使硅橡胶的热分解速率降低,氧指数、垂直燃烧等级和三点弯曲强度提高,烧蚀后残质量率增大。
The effects of blending a self-made sintering aid with flame retardant mica powder and glass powder on the physical properties and flame retardant properties of the silicone rubber,as well as the appearance morphology and residual mass rate after the ablation process,were studied.The results showed that,the sintering aid promoted the sintering of mica powder,and the mica powder/glass powder/sintering aid blend(4/1/1 of blend ratio)had a better sintering effect than that of the mica powder/glass powder blend(2/1 of blend ratio)and mica powder/sintering aid blend(2/1 of blend ratio).The addition of mica powder/glass powder/sintering aid blend reduced the tensile properties of the silicone rubber,but promoted the rapid formation of a homogeneous,dense,continuous,smooth and fine ceramicized hard shell of the silicone rubber at high temperature,which could block the heat and oxygen from entering the interior of the silicone rubber,so that the thermal decomposition rate of the silicone rubber was reduced,the oxygen index,vertical combustion grade and three-point bending strength were improved,and the residual mass rate after ablation was increased.
作者
贺春江
HE Chunjiang(Metals and Chemistry Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《橡胶工业》
CAS
2022年第1期34-38,共5页
China Rubber Industry
基金
中国铁道科学研究院集团有限公司院基金资助项目(1551JH7606)。
关键词
助烧剂
硅橡胶
云母粉
玻璃粉
阻燃剂
烧蚀
阻燃性能
sintering aid
silicone rubber
mica powder
glass powder
flame retardant
ablation
flame retardant property
