摘要
研究了纳米二氧化硅(nano-SiO2)对含聚烯烃弹性体(POE)的共聚PP增强增韧阻燃复合材料的力学性能和阻燃性能的影响规律。结果表明,少量nano-SiO2即可提高聚丙烯/膨胀型阻燃剂/聚烯烃弹性体(PP/IFR/POE)复合材料的缺口冲击强度,并提高复合材料的拉伸强度与断裂伸长率。但是,当nano-SiO2含量超过2%后,复合材料的冲击强度有下降趋势。PP/IFR/POE/nano-SiO2复合材料的极限氧指数(LOI)值在nano-SiO2含量为2%时达到最大值。相比于未加入nano-SiO2的复合材料,添加了nano-SiO2的复合材料的热稳定性有明显提升。此外,PP/IFR/POE/nano-SiO2复合材料还具有较好的流动性。
The influence of nano-SiO2 on the intumescent flame retardant （IFR） modified copolymer polypropylene（PP） containing polyolefin elastomer（POE） was investigated thoroughly.The results showed that the notched impact strength of PP/IFR/POE/nano-SiO2 composites could be effectively improves with small amounts of nano-SiO2.Tensile strength and percent of elongation at break of the composites are improved too.However,the impact strength tends to decrease as the nano-SiO2 content is more than 2％.The limited oxygen index（LOI） is the highest as the nano-SiO2 content is 2％.At the same time,the thermal stability is apparently elevated.Moreover,the obtained composites are of good flowing ability.
出处
《塑料助剂》
2015年第3期33-39,共7页
Plastics Additives
