燃气用聚乙烯管材的人工气候加速老化  

Accelerated Aging of Polyethylene Gas Pipe under Artificial Climate

作　　者：申麦茹 铁文安 丁辉 刘晓东 Shen Mairu;Tie Wen’an;Ding Hui;Liu Xiaodong(Shaanxi Province Boiler and Pressure Vessel Inspection Institute, Xi’an 710048, China;Shaanxi Hua Shan Sujiao Co. Ltd.,Xi’an 710043, China;Shaanxi Province Product Quality Supervision and Inspection Institute, Xi’an 710048, China)

机构地区：[1]陕西省锅炉压力容器检验所,西安710048 [2]陕西华山胜邦塑胶有限公司,西安710043 [3]陕西省产品质量监督检验研究院,西安710048

出　　处：《工程塑料应用》2017年第11期104-107,共4页Engineering Plastics Application

基　　金：国家质检总局科技计划项目(2015QK210)

摘　　要：以氙灯作为辐照光源,对外径分别为110 mm和63 mm的两种规格聚乙烯燃气管进行了人工气候加速老化试验,通过测试聚乙烯燃气管试样在不同累积接受能量下的氧化诱导时间、拉伸性能、熔体流动速率(MFR)等3项重要性能指标的变化,探讨人工气候加速老化对聚乙烯燃气管物理力学性能的影响规律。结果表明,在接受能量为3.5 GJ/m2时,聚乙烯燃气管试样表面发生严重老化,其氧化诱导时间均小于10 min;当接受能量达到4 GJ/m2时,试样氧化诱导时间急剧衰减,均小于5 min,其表面几乎完全老化。随着接受能量的增加,所有试样的拉伸屈服强度和断裂伸长率的变化幅度均较小,与无色条试样相比,表面带有黄色色条试样的断裂伸长率发生锐减,所有试样的MFR未发生较大变化。Using xenon lamp as irradiation light source,the accelerated aging tests under artificial climate of two specifications polyethylene gas pipe with110mm and63mm were done.Through studying the changes of three important performance indexes(oxidation induction time,tensile property and melt flow rate)of polyethylene gas pipe samples under different irradiation energy,the influence law of the accelerated aging under artificial climate on the physical and mechanical properties of polyethylene gas pipe was investigated.The results show that,after receiving the energy of3.5GJ/m2,the surface aging of all samples are very serious and the oxidation induction times are less than10min,after receiving the energy of4GJ/m2,the oxidation induction times are declined sharply and less than5min,the surfaces of all samples are aged almost entirely.With the increase of the energy,the tensile yield strength and elongation at break of all samples are changed little,however,compared with samples without color bars,the elongation at break of samples with yellow bars on surface are dropped markedly,the melt flow rate of all samples remain almost unchanged.

关 键 词：聚乙烯燃气管 人工气候加速老化 氧化诱导时间 拉伸屈服强度 断裂伸长率 熔体流动速率 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]