PE100级聚乙烯管热熔接头结晶度测定  

Measurement for crystallinity of polyethylene PE100 grade pipe for butt fusion joint

作　　者：张晓明 王瑜 马佼佼 黄磊 徐冉 谭金锋 王帆 吴萍 Zhang Xiaoming;Wang Yu;Ma Jiaojiao;Huang Lei;Xu Ran;Tan Jinfeng;Wang Fan;Wu Ping(Shaanxi Special Equipment Inspection and Testing Institute,Xi'an 710048,China;CNPC Tubular Goods Research Institute,Xi'an 710077,China;Xi'an Special Equipment Inspection Institute,Xi'an 710065,China)

机构地区：[1]陕西省特种设备检验检测研究院,陕西西安710048 [2]中国石油集团工程材料研究院有限公司,陕西西安710077 [3]西安特种设备检验检测院,陕西西安710065

出　　处：《合成树脂及塑料》2024年第5期47-51,共5页China Synthetic Resin and Plastics

基　　金：陕西省重点研发计划(2022ZDLSF07-08)。

摘　　要：以城镇燃气用PE100级聚乙烯管热熔接头为研究对象,制作典型温度区间的冷焊缺陷接头,采用X射线衍射仪测量接头材料的结晶度,得到冷焊缺陷安全评估的依据。结果表明:冷焊接头的结晶度与接头焊接温度密切相关,在焊接温度为210,230℃时的结晶度均最大,130℃冷焊和250℃过焊温度时的结晶度均较低;当结晶度增大时,最高峰向着衍射角增加的方向移动,130,150℃时的冷焊缺陷半峰宽均达1.3°以上,分子链排布无序性加大。Polyethylene PE100 grade pipe for butt fusion joint for urban gas was used to porduce the cold welding defective joint with typical temperature range,whose crystallinity was measured by X-ray diffractometer to obtain the basis for the cold welding defect safety assessment.The results show that the crystallinity of cold welding joint is closely related to the welding temperature of the joint,and the crystallinity value is the highest at 210℃ and 230℃,while the crystallinity value is lower at 130℃ and 250℃.When crystallinity increases,the highest peak moves in the direction of increasing diffraction angle.The half-peak width of cold welding defects is more than 1.3°at 130℃ and 150℃,and the disorder of molecular chain arrangement is increased.

关 键 词：PE100级聚乙烯 结晶度 热熔接头 冷焊 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]