纳米钛对PP耐光氧老化性能的影响  

Affect of nano-Ti on photooxidative aging-resistant properties of PP

作　　者：李跃文[1,2] 陈兴华[1] 杨敏[1] 辛湘杰 苏胜培[4] 

机构地区：[1]湖南科技职业学院 [2]湖南师范大学化学化工学院,湖南长沙410081 [3]科星纳米工程技术有限公司

出　　处：《合成树脂及塑料》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)

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.

关 键 词：聚丙烯 纳米钛 熔融共混 复合材料 光氧老化 

分 类 号：TQ325[化学工程—合成树脂塑料工业] TQ320