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作 者:王宇杰[1] 赵晓文[2] 牛振宇 孔琛 黄强[1] 陈商涛[1] 荔栓红[1] 胡杰[1] 叶林[2] WANG Yujie;ZHAO Xiaowen;NIU Zhenyu;KONG Chen;HUANG Qiang;CHEN Shangtao;LI Shuanhong;HU Jie;YE Lin(Synthetic Resin Laboratory,Petrochemical Research Institute,PetroChina,Beijing 102206,China;State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Chengdu,Sichuan 610065,China;Xi'an Changqing Technology Engineering Co.Ltd.,Xi'an,Shaanxi 710000,China)
机构地区:[1]中国石油天然气股份有限公司石油化工研究院合成树脂加工应用研究室,北京102206 [2]高分子材料工程国家重点实验室,四川大学高分子研究所,四川成都610065 [3]西安长庆科技工程有限责任公司,陕西西安710000
出 处:《石油管材与仪器》2019年第4期57-60,65,共5页Petroleum Tubular Goods & Instruments
摘 要:采用固相口模拉伸技术制备双轴取向聚乙烯管材,研究拉伸温度、速率等工艺条件对其轴向及环向拉伸比的影响,探究具有不同拉伸比的管材试样分子双轴取向结晶结构。口模拉伸速率对管材轴向及环向拉伸比影响较大;随轴向拉伸比增加,管材分子的结晶性能增强;当轴向拉伸比较小时,管材分子沿轴向与环向取向程度均增加,环向取向因子由0.036增至0.293,并逐渐产生偏离轴向的双轴取向片晶结构,而当轴向拉伸比较大时,管材分子片晶结构逐渐沿垂直于轴向方向发生扭转。结果表明,经固相口模拉伸后试样轴向及环向拉伸强度均大幅提高,实现了聚乙烯管材的双向自增强。In this work,biaxially oriented polyethylene pipes were prepared through solid die drawing technology.The influences of drawing temperature and speed on the draw ratio both in the axial and hoop direction were studied,and the biaxially oriented structures of the pipe samples with different draw ratio were discussed.Drawing speed had a great influence on the draw ratio of the pipes.With the increase of the axial draw ratio,the crystallinity of the sample increased.When the axial draw ratio was low,the degree of orientation both in axial and hoop direction increased,and the value of the latter one can increase from 0.036 to 0.293.Moreover,the lamellae deviated from the axial direction and biaxially oriented structure formed.However,when the axial draw ratio was high,the arrangement of the lamellae twisted towards the direction perpendicular to the axial direction.The results showed that,after die drawing,the tensile strength of the samples both in axial and hoop direction were enhanced obviously,realizing the biaxial self-reinforcement of polyethylene pipes.
关 键 词:双轴取向聚乙烯管材 固相口模拉伸技术 结晶取向结构 双向自增强
分 类 号:TQ31[化学工程—高聚物工业]
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