CAJ | 학술논문

选用4种不同等级的超高压交联聚乙烯电缆绝缘料为研究对象，包括1种国产料和3种进口料。采用凝胶渗透色谱(GPC)和旋转流变仪等方法，深入研究4种材料的结构与性能的关系，分析了其长支链(LCB)结构与流变性能的关系。GPC的结果表明，4种样品的重均分子量在65000~75000 g/mol，而分子量分布约为5.0。通过对流变学参数的分析，比如零剪切黏度、低频末端储能模量曲线的斜率和Cole-Cole曲线的偏离程度，发现4种样品的长支链含量由高到低的排序为：进口样C、进口样B、YJ-110、进口样A。结合样品的耐压等级可知，绝缘料长支链的含量会随着耐压等级的增加而增加。
선용4충불동등급적초고압교련취을희전람절연료위연구대상，포괄1충국산료화3충진구료。채용응효삼투색보(GPC)화선전류변의등방법，심입연구4충재료적결구여성능적관계，분석료기장지련(LCB)결구여류변성능적관계。GPC적결과표명，4충양품적중균분자량재65000~75000 g/mol，이분자량분포약위5.0。통과대류변학삼수적분석，비여령전절점도、저빈말단저능모량곡선적사솔화Cole-Cole곡선적편리정도，발현4충양품적장지련함량유고도저적배서위：진구양C、진구양B、YJ-110、진구양A。결합양품적내압등급가지，절연료장지련적함량회수착내압등급적증가이증가。
Four kinds of extra-high-voltage (EHV) crosslinked polyethylene (XLPE) cables of different grades, including one domestic sample and three imported samples, were selected as research object. Gel permeation chromatography (GPC) and rotational rheometer were used to investigate the relationship between structure and properties, especially the relationship between long chain branched (LCB) structure and rheological properties of these four materials. The GPC results showed that the weight-average molecular weight of four samples was between 65 000 g/mol and 75 000 g/mol, and the molecular weight distribution was about 5.0. Through the analysis of rheological parameters, such as the zero shear visco-sity, low frequency terminal slope of storage modulus, and the deviation of the Cole-Cole curves, we found that the order from high to low of LCB content for four samples is Import C, Import B, YJ-110, Import A. Combined with the voltage levels of the samples, we obtained that the LCB content of insulation materials increased with the increase of voltage level.