摘要
采用乙烯基硅烷在氢氧化镁(MH)表面引入乙烯基后与苯乙烯原位聚合,制备苯乙烯原位共聚合改性MH。将改性前后的MH、微胶囊红磷(MRP)、高抗冲聚苯乙烯(HIPS)按不同配比熔融复合制备HIPS/MH和HIPS/MH/MRP复合材料。研究了复合材料的力学性能和阻燃性能。结果表明:改性后的MH能显著提高复合材料的冲击强度。改性前后的MH与MRP的协同阻燃效应使HIPS/MH复合材料极限氧指数提高到28.9%,UL 94垂直燃烧达到V-0级。MH与MRP的协同作用增加了HIPS/MH复合材料的点燃难度,有效抑制了HIPS的热释放速率和烟释放速率,对HIPS起到良好的阻燃作用。
Magnesium hydroxide（MH） particles were modified with such an approach of introducing vinyl silane on the surface of MH and then polymerizing in situ with styrene. HIPS/MH and HIPS/MH/micro-capsulated red phosphorus（MRP） composites with different mixing proportions were prepared via melt blending of the corre- sponding components, respectively. The mechanical properties and flame retardant performances of the HIPS/ MH/MRP composites were studied. The results indicate that adding the modified MH（MMH） can obviously raise the notched Charpy impact strength of HIPS/MMH and HIPS/MMH/MRP composites. The synergistic flame retardant effect among MH, modified MMH and MRP makes the limited oxygen index and vertical UL 94 burning rate of the HIPS/MH/MRP composites reach 28.9% and UL 94 V-0, respectively. Also the synergistic effect between MH and MRP improves the resistance to ignite and effectively restrain the heat and smoke release rate of the HIPS/MH composites, exhibiting excellent flame retardance.
出处
《合成树脂及塑料》
CAS
北大核心
2010年第3期20-24,共5页
China Synthetic Resin and Plastics
基金
绿色化工过程省部共建教育部重点实验室资助(GCP200908)
武汉工程大学研究生创新基金
关键词
高抗冲聚苯乙烯
氢氧化镁
原位聚合
力学性能
阻燃
high impact polystyrene
magnesium hydroxide
in situ polymerization
mechanical property
flame retardance
