摘要
研究了聚丙烯(PP)及PP/纳米钛复合材料在自然条件下的光氧老化性能及其机理。存自然条件下曝露90天后,纯PP的断裂伸长率和冲击强度分别为曝露前的3%和41%,而含质量分数为l%和2%纳米钛的PP复合材料断裂伸长率分别为曝露前的22%和25%;其冲击强度分别为曝露前的63%和70%;曝露后,纯PP中羰基含量比复合材料高。
The photooxidative aging and aging mechanism of polypropylene （PP） and PP/nano-Ti composites were studied. The results have revealed that the rupture elongation of virginal PP, which has been exposed out of doors for 90 days, is only 3% of that of its corresponding no-exposed PP while the rupture elongation of PP composites containing 1% and 2% nano-Ti are 22% and 25% of that of their corresponding no-exposed composites. The impact strength of virginal PP is only 41% of that of its corresponding no-exposed PP while the impact strength of PP composites containing 1% and 2% nano-Ti are 63% and 70% of that of their corresponding no-exposed composites. Furthermore, after exposed for 90 days, the content of carbonyl functional group in virginal PP is higher compared to that in the composites.
出处
《合成树脂及塑料》
EI
CAS
北大核心
2007年第3期25-28,共4页
China Synthetic Resin and Plastics
基金
国家自然科学基金资助课题(50362002)
湖南省科技计划项目(05FK5012)
关键词
聚丙烯
纳米钛
熔融共混
复合材料
光氧老化
polypropylene
nano-Ti
melt blending
composites
photooxidative aging
