塑料科技2011，Vol.39Issue(6)：38-42,5.
紫外光对PP蠕变行为的影响
Influence of UV Light on Creep Behavior of Polypropylene
摘要
Abstract
The effect of UV light on the creep behavior of PP was studied by UV irradiation. The creep behavior and creep failure mechanisms of PP under UV irradiation were studied by creep property test, GPC、 XPS、 PALS and SEM analysis. It was found that the UV could accelerate creep failure of PP. The failure mechanisms were connected with UV radiation intensity. The short-term failure was mainly caused by the change of the activity of molecular chain; and the long-term failure was due to strength weakness of materials caused by UV. In addition, under the same external conditions(temperature, tensile stress and UV light), the failure rate for different types of PP had been found to be independent of the structure and molecular weight, depending only on the yield strength at certain temperature, the higher the yield strength was, the slower the failure rate was.关键词
聚丙烯/蠕变行为/紫外光/微观结构/蠕变失效Key words
Polypropylene/ Creep behavior/ UV light/ Micro-structure/ Creep failure分类
化学化工引用本文复制引用
刘小林,孙世利,陈健,刘罡,杨其,李光宪..紫外光对PP蠕变行为的影响[J].塑料科技,2011,39(6):38-42,5.基金项目
国家自然科学基金(50533080) （50533080）
