摘要
将无机纳米材料、线性低密度聚乙烯(LLDPE)、高密度聚乙烯(HDPE)与聚丙烯(PP)熔融共混制备PP/LLDPE/HDPE/无机纳米耐候性复合材料。采用透射电子显微镜(TEM)、红外光谱仪(IR)、紫外-可见光谱仪(UW-V)以及力学性能测试等手段研究了聚乙烯(PE)/nano-SiO_2、PE/nano-TiO_2、PE/nano-ZnO复合体系对PP低温脆性和抗紫外老化性的影响。结果表明,复合材料中,无机纳米材料的质量分数为l%时,分散性最好,可促使PP与PE之间相互作用增强。PP/LLDPE/HDPE/nano-SiO_2低温抗冲击性能最好,温度为-10℃时其冲击强度保持率由纯PP的20.2%提高到了59.3%;PP/LLDPE/HDPE/nano-TiO_2的抗紫外线老化性能最好,老化144 h后断裂伸长率和冲击强度保持率分别提高到了43.9%和48.0%。
Polypropylene （PP）/linear low density polyethylene （LLDPE）/high density polyethylene（HDPE）/inorganic nanometer weatherable composite materials were prepared from inorganic nanomaterials,LLDPE, HDPE and PP by melt blending method. The effects of the systems including PE/nano-SiO2, PE/nano-TiO2 and PE/nano-ZnO on the low temperature brittleness and UV aging resistance of PP were studied bymeans of transmission electron microscope, infrared spectrometer, UV-visible spectrophotometer andmechanical properties test. The results indicate that the composite materials could achieve the best dispersionwhen the inorganic nanometer content is 1%, so the interaction between PP and PE is enhanced. Low-temperature impact resistance of PP/LLDPE/HDPE/nano-SiO2 is the best with the increased impact strengthretention rate from 20. 2% to 59. 3% at - 10℃ compared with pure PP. And UV aging resistance of PP/LLDPE/HDPE/nano-TiO2 was the best, for the retention rate of elongation at break and impact strength afteraging for 144 h are improved to 43.9% and 48% , respectively.
出处
《塑料工业》
CAS
CSCD
北大核心
2016年第6期102-105,139,共5页
China Plastics Industry
基金
国家自然科学基金项目(21474082,21364014)
关键词
聚丙烯
无机纳米材料
低温脆性
紫外老化
断裂伸长率
Polypropylene
Inorganic Nanomaterial
Low Temperature Brittleness
UV Aging
Elongation at Break
