炭黑对给水用聚乙烯管材物理性能的影响  

Effect of carbon black on physical properties of polyethylene pipes for water supply

作　　者：蔡豪坤 董坚[2] 蒋仲义 CAI Haokun;DONG Jian;JIANG Zhongyi(Ningbo Academy of Product and Food Quality Inspection(Ningbo Fiber Inspection Institute),Ningbo 315048,China;Shaoxing University,Shaoxing 312000,China)

机构地区：[1]宁波市产品食品质量检验研究院(宁波市纤维检验所),浙江宁波315048 [2]绍兴文理学院,浙江绍兴312000

出　　处：《中国塑料》2022年第1期42-46,共5页China Plastics

基　　金：宁波市领军和拔尖人才培养工程项目(2017145)。

摘　　要：采用不同炭黑比例的聚乙烯(PE)管材,研究了炭黑对PE管材物理性能的影响。结果表明,炭黑对PE管材的氧化诱导时间(OIT)、拉伸性能、密度均有一定的影响;相同的原料和工艺下,密度与炭黑含量呈线性关系,随着炭黑含量的增加,密度也随之增大;在炭黑含量为1.43%~3.51%区间内,随着炭黑分散等级的增大,OIT变小,并且与210℃相比,200℃下的OIT提高了1.3~1.6倍;断裂成功率(拉伸足够多的试样直到成功拉断5根试样为止,即5与总试验次数的比值)随着炭黑分散等级的增大而变小;并指出国标GB/T 8804.1—2003只是要求拉断成功的数据,并不能客观真实反映管材拉伸质量状况,建议考量断裂成功率这一概念。The effect of carbon black on the physical properties of polyethylene pipes with different carbon black weight fraction was investigated.the results indicated that carbon black had a certain effect on the oxidation induction time(OIT),tensile properties and density of the thermoplastic compounds.With the same raw materials and process,the density was linearly related to the content of carbon black,and the density increased with an increase in the content of carbon black.In the carbon black content range of 1.43%~3.51%,the OIT became smaller with an increase in the dispersion grade of carbon black,and the OIT at 200℃increased by 1.3~1.6 times compared to that at 210℃.The concept of the fracture success rate was defined as the stretching enough samples until five samples were successfully broken with the ratio of five to the total number of tests.The fracture success rate became smaller with an increase in the dispersion grade of carbon black.Moreover,it was proposed that the national standard GB/T 8804.1—2003 only required the data of successful breaking.This cannot reflect the tensile quality of pipes objectively and truly.It was suggested to consider the concept of fracture success rate.

关 键 词：氧化诱导时间 拉伸 密度 炭黑含量 炭黑分散度 聚乙烯 管材 断裂成功率 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]