摘要
采用化学发泡法制备出聚丙烯/纳米二氧化硅(PP/nano-SiO2)微发泡复合材料,探讨了不同模具温度对PP/nano-SiO2发泡行为的影响。结果表明:模具温度对PP/nano-SiO2发泡材料发泡行为的影响主要体现在2个方面:一方面,影响PP/nano-SiO2复合发泡材料的泡孔结构参数,随模具温度升高,熔胶散热越慢,泡孔的直径越大,泡孔密度越小,分散状态越不稳定;另一方面,影响PP/nano-SiO2发泡材料制品内部区域面积,及随模具温度升高,发泡面积越大。发泡材料的冲击强度和拉伸强度随模具温度的升高明显下降。
PP/nano-SiO2 microcellular by taking the chemical foaming method material was prepared. The relationship between different mold temperatures and the foaming behavior of PP/nano-SiO2 was studied. The experiment resuhs showed that the effects of mold temperature on the foaming behavior of PP/nano-SiO2 mainly reflected in two aspects. Firstly, the cell structure parameters were changed. Improving the temperature, the heat dissipation rate of melt slowed down, cell diameter became bigger,cell density get smaller and the cell dispersity was astable. Secondly,the foaming area of microcellular material was affected obviously. With the temperature elevated, the foaming area was larger： As the mold temperature increased, the tensile strength and impact strength of the foamed material were significantly decreased.
出处
《塑料》
CAS
CSCD
北大核心
2013年第5期30-33,共4页
Plastics
基金
黔科合重大专项字(20126023)
关键词
聚丙烯
模具温度
化学发泡
泡孔结构
发泡行为
polypropylene
mold temperature
chemical foaming
foam structure
foaming behavior
