乙烯咔唑接枝聚乙烯的制备及其介电性能

发布时间：2018-01-23 12:30

本文关键词： 聚乙烯乙烯咔唑接枝过氧化二异丙苯熔融法介电性能　出处：《高电压技术》2017年09期 　论文类型：期刊论文

【摘要】：为了制备高介电强度的聚乙烯(LDPE)材料,采用熔融法制备乙烯咔唑(VK)接枝聚乙烯,研究了引发剂过氧化二异丙苯(DCP)及VK用量对接枝率的影响,并进一步研究了接枝率对其介电性能的影响。结果表明:在聚乙烯为1.33×10~(-3) mol时,当DCP为1.5×10~(-4) mol和4.5×10~(-4) mol时,随着VK用量的增加接枝率先升高后降低;而当DCP增加到7.5×10~(-4) mol时,随着VK用量的增加接枝率增大并达到基本稳定值;当LDPE:DCP:VK摩尔比为26:9:150时,接枝率是15.16%;随着接枝率的增加,材料的体积电阻率呈现先升后降的关系,当接枝率为10.12%时,体积电阻率达到5.34×1015?·m,是纯LDPE的3.2倍;同样,随着接枝率的增加,击穿场强呈现先升后降的关系,接枝率为13.02%时,击穿场强为51.70 kV/mm,比纯LDPE提高了67.64%。为高介电性能聚烯烃电缆料的研制打下了良好的基础。
[Abstract]:In order to prepare high dielectric strength polyethylene (LDPE) materials, vinyl carbazole (VK) grafted polyethylene was prepared by melting method. The effects of the initiator diisopropyl peroxide (DCPO) and the amount of VK on the grafting rate were studied. The effect of grafting ratio on the dielectric properties was also studied. The results showed that when polyethylene was 1.33 脳 10 ~ (-3) mol. When the DCP was 1.5 脳 10 ~ (-4) mol and 4.5 脳 10 ~ (-4) mol, the graft copolymerization increased firstly and then decreased with the increase of VK content. When DCP increased to 7.5 脳 10 ~ (-4) mol, the grafting rate increased with the increase of VK content and reached the basic stable value. When the molar ratio of LDPE:DCP:VK is 26: 9: 150, the grafting rate is 15.16. With the increase of grafting ratio, the volume resistivity of the material increased first and then decreased. When the grafting ratio was 10.12, the volume resistivity reached 5.34 脳 10 ~ (15)? 路m, 3.2 times as much as pure LDPE; Similarly, with the increase of grafting rate, the breakdown field strength increased first and then decreased. When the grafting rate was 13.02, the breakdown field strength was 51.70 kV/mm. Compared with pure LDPE, it is 67.64 and lays a good foundation for the development of high dielectric properties polyolefin cable material.
【作者单位】：哈尔滨理工大学工程电介质及其应用教育部重点实验室;哈尔滨理工大学材料科学与工程学院;哈尔滨理工大学电气与电子工程学院;黑龙江省科学院技术物理研究所;
【基金】：哈尔滨理工大学工程电介质及其应用教育部重点实验室开放课题资金支持项目(HUST201401X)~~
【分类号】：TM215.1
【正文快照】： 0引言1聚乙烯具有突出的电学性能和良好的加工性能,在高压以及超高压电力电缆中应用广泛。然而, 对于应用于高压电缆的电缆材料研究还存在一些亟待解决的问题,其中最大问题就是材料本身的击穿场强偏低。为了制得高压和超高压电力电缆,一般采用增加电缆绝缘厚度的方法[1-2];但

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