取样位置和自然气候对聚乙烯管材氧化诱导时间的影响  

The influence of sampling location and natural climate on the oxidation induction time of polyethylene pipes

作　　者：赵森龙 徐哲 夏孝飞 张增宇 夏颢毓 马远恩 叶念婷 何华斌 ZHAO Senlong;XU Zhe;XIA Xiaofei;ZHANG Zengyu;XIA Haoyu;MA Yuanen;YE Nianting;HE Huabin(Zhejiang Fangyuan Test Group Co.,Ltd.,Hangzhou 310018,China)

机构地区：[1]浙江方圆检测集团股份有限公司,杭州310018

出　　处：《理化检验(物理分册)》2025年第4期26-29,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：以聚乙烯管材为研究对象,采用差示扫描量热仪测试了聚乙烯管材的氧化诱导时间,并研究了取样位置、自然气候作用时间对氧化诱导时间测试结果的影响。结果表明:未经自然气候作用时,聚乙烯管材中部、内表面、外表面的氧化诱导时间依次减少;聚乙烯管材中部的氧化诱导时间随自然气候作用时间变化较小;外表面经自然气候作用90 d后,以及内表面经自然气候作用150 d后,试样的氧化诱导时间明显缩短,且外表面的缩短时间更长;经自然气候作用240 d后,沿聚乙烯管材厚度方向,距外表面9 mm以上或距内表面6 mm以上位置的氧化诱导时间更接近原始管材。Taking polyethylene pipes as the research object,the oxidation induction time of polyethylene pipes was tested using a differential scanning calorimeter,and the effects of sampling location and natural climate exposure time on the oxidation induction time test results were studied.The results show that without the influence of natural climate,the oxidation induction time of the middle,inner,and outer surfaces of polyethylene pipes decreased in sequence.The oxidation induction time in the middle of polyethylene pipes varied little with the natural climate.After 90 days of natural climate exposure on the outer surface and 150 days of natural climate exposure on the inner surface,the oxidation induction time of the sample significantly shortened,and the shortening time on the outer surface was longer.After 240 days of natural climate action,the oxidation induction time along the thickness direction of the polyethylene pipe at a distance of more than 9 mm from the outer surface or more than 6 mm from the inner surface was closer to that of the original pipe.

关 键 词：聚乙烯管材 氧化诱导时间 取样位置 自然气候 弯曲强度 

分 类 号：TB32[一般工业技术—材料科学与工程] TQ317[化学工程—高聚物工业]