论文部分内容阅读
以自行合成的笼形八乙烯基硅倍半氧烷(OVP)与三元乙丙橡胶(EPDM)及硫化剂等通过双辊混炼机制备笼形低聚硅倍半氧烷(POSS)/EPDM纳米杂化材料。测定了POSS/EPDM杂化材料的力学性能和阻燃性能,并利用热重分析仪及锥形量热仪考察了材料的热稳定性及热释放速率。结果表明:含OVP的POSS/EPDM纳米杂化材料与纯EPDM相比,氧指数(LOI)和热稳定性明显提高,热释放速率显著降低。仅加入0.88%的OVP即可将LOI提高11.8%,起始热分解温度提高51℃,残炭量为纯EPDM的1.58倍,热释放速率降低25.8%,可见OVP在提高EPDM综合性能方面有较高应用价值。
Caged oligomeric silsesquioxanes (POSS) / poly (vinylidene chloride) copolymers were prepared by a self-synthesized cage octavinylsilsesquioxane (OVP), ethylene propylene diene monomer (EPDM) EPDM nano-hybrid material. The mechanical properties and flame retardancy of POSS / EPDM hybrid materials were measured. The thermal stability and heat release rate of the materials were investigated by TGA and cone calorimeter. The results show that the oxygen index (LOI) and thermal stability of POSS / EPDM nanocomposites containing OVP are significantly higher than those of pure EPDM, and the heat release rate is significantly reduced. The addition of 0.88% OVP increased the LOI by 11.8%, the initial pyrolysis temperature by 51 ° C, the amount of carbon residue by 1.58 times that of pure EPDM and the heat release rate by 25.8%. It can be seen that OVP is more effective in improving the comprehensive performance of EPDM High application value.