乙烯咔唑接枝聚乙烯的制备及其介电性能  

Preparation of Vinyl Carbazole Grafted Polyethylene and Its Dielectric Properties

作　　者：张文龙[1,2] 马振清 戴亚杰[2] 王暄[1,3] 刘宇光[1,4] 

机构地区：[1]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150080 [2]哈尔滨理工大学材料科学与工程学院,哈尔滨150040 [3]哈尔滨理工大学电气与电子工程学院,哈尔滨150080 [4]黑龙江省科学院技术物理研究所,哈尔滨150010

出　　处：《高电压技术》2017年第9期2813-2817,共5页High Voltage Engineering

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)~~

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。In order to prepare the polyethylene material with high dielectric strength, the vinyl carbazole（VK） was grafted to polyethylene by melting method. The effects of dicumyl peroxide（DCP） and VK dosages on graft degree（GD） were researched. Moreover, the influence of GD on the dielectric properties was investigated. The results show that when LDPE is 1.33×10^-3 mol and DCP is 1.5×10^-4 mol or 4.5×10^-4 mol, GD firstly increased and then decreased as the VK dosage increased. But when DCP is 7.5×10^-4 mol, GD firstly increased and then remained about the same with the VK dosage increased. And when the molar ratio of LDPE：DCP ： VK is 26：9：150, the highest GD is 15.16%. Along with the increase of GD, the volume resistivity firstly increased and then decreased. When GD is 10.12%, the volume resistivity is 5.34×1015 ？·m that is 3.2 times of pure LDPE. The breakdown strength firstly increased and then decreased with the GD increase. When the GD is 13.02%, the breakdown strength is 51.70 kV/mm that is 67.64% higher than that of pure LDPE. This work can lay the foundation for development of polyolefin cable materials with high dielectric properties.

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 

分 类 号：TM215.1[一般工业技术—材料科学与工程]