摘要
在常规聚氯乙烯(PVC)基木塑复合材料配方中分别添加苯并三唑类紫外线吸收剂UV–P或二苯甲酮类紫外线吸收剂UV–531,延缓PVC基木塑复合材料暴露于户外所引起的降解,提高PVC基木塑复合材料的耐自然光老化性能。采用氙灯照射加速老化、紫外线照射加速老化和户外自然老化试验方法,研究了2种紫外线吸收剂对PVC基木塑复合材料抗老化性能的影响。在PVC基木塑复合材料常规配方中加入5份UV–P或UV–531,用氙灯照射加速老化5 000 h,PVC基木塑复合材料的色差分别为33.1,40.5,较常规配方分别降低了34%,19%;用紫外线照射加速老化3 000 h,PVC基木塑复合材料的色差分别为5.33,8.62,较常规配方的色差分别降低了58%,31%;在户外自然老化24个月,PVC基木塑复合材料的色差分别为26.3,30.2,较常规配方分别降低了54%,47%。加入紫外线吸收剂UV–531或UV–P,都能有效提高PVC基木塑复合材料的抗老化效果。UV–P的抗老化效果较UV–531好。
In order to improve anti natural light aging properties of poly（vinyl chloride）（PVC） based wood plastic composites, the benzotriazole ultraviolet absorber（UV-P） or benzophenone ultraviolet absorber（UV-531） were added to normal PVC based wood plastic composites formulation respectively to achieve delaying degradation of the composites caused by outdoor exposure. The effects of two kinds of ultraviolet absorbers on anti aging properties of the composites were studied by xenon lamp irradiation accelerated aging, ultraviolet irradiation accelerated aging and outdoor natural aging test method. 5 phr UV-P or UV-531 are added to normal PVC based wood plastic composites formulation. When the xenon lamp irradiation accelerated aging time is 5 000 h, the chromatic aberrations of the composites are 33.1,40.5, and reduce by 34%, 19% comparing with the normal formulation respectively. When the ultraviolet irradiation accelerated aging time is 3 000 h, the chromatic aberrations of the composites are 5.33,8.62, and reduce by 58%, 31% comparing with the normal formulation respectively. When the outdoor natural aging time is 24 months, the chromatic aberrations of the composites are 26.3,30.2, and reduce by 54%, 47% comparing with the normal formulation respectively. The anti aging effect of the composites are improved by application of UV-P and UV-531. Adding UV-P is more suitable than adding UV-531.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2014年第6期79-82,共4页
Engineering Plastics Application
基金
2013年广州市第二批科技计划项目重大专项(新材料)(2013Y2-00110)
关键词
PVC基木塑复合材料
抗老化
紫外线吸收剂
色差
poly（vinyl chloride） based wood plastic composite
anti aging
ultraviolet absorber
chromatic aberration
