CAJ | 학술논문

为提高低密度聚乙烯(low-density polyethylene，LDPE)材料的抗电树枝老化能力，提出采用交流电场诱导蒙脱土(montmorillonite，MMT)片层，以实现其在低密度聚乙烯中取向分散的方法。首先，设计了电场诱导实验装置，用工频交流电场对熔融状态下的低密度聚乙烯/蒙脱土(LDPE/MMT)复合材料进行诱导实验；其次，通过测试材料的 X 射线衍射谱、紫外光透射率和材料断面、表面的扫描电子显微图片，表征了电场诱导对MMT在LDPE中的取向分散影响；最后，对比观察了电场诱导前后LDPE/MMT复合材料中的电树枝的引发和生长特性的差异。结果表明，电场诱导有助于MMT片层在LDPE中均匀分散，且使得MMT片层沿平行于电场的方向发生偏转，诱导后的 LDPE/MMT复合材料在垂直于取向电场的方向上具有更好地抑制电树枝的能力。
위제고저밀도취을희(low-density polyethylene，LDPE)재료적항전수지노화능력，제출채용교류전장유도몽탈토(montmorillonite，MMT)편층，이실현기재저밀도취을희중취향분산적방법。수선，설계료전장유도실험장치，용공빈교류전장대용융상태하적저밀도취을희/몽탈토(LDPE/MMT)복합재료진행유도실험；기차，통과측시재료적 X 사선연사보、자외광투사솔화재료단면、표면적소묘전자현미도편，표정료전장유도대MMT재LDPE중적취향분산영향；최후，대비관찰료전장유도전후LDPE/MMT복합재료중적전수지적인발화생장특성적차이。결과표명，전장유도유조우MMT편층재LDPE중균균분산，차사득MMT편층연평행우전장적방향발생편전，유도후적 LDPE/MMT복합재료재수직우취향전장적방향상구유경호지억제전수지적능력。
To improve the electrical tree resistance capability of low-density polyethylene (LDPE), a novel method is proposed to orientate the montmorillonite (MMT) in LDPE by electric field inducing treatment. A new orientation setup was designed and manufactured. A set-up for electrical inducement was designed to realize the orientation of the MMT in LDPE/MMT composite material. The effect of electrical inducing orientation was characterized by the measurement results of X-ray diffraction (XRD), transmittivity of UV, scanning electron microscope (SEM) of surface and cross-section. The initiation and propagation properties of electrical trees in the LDPE/MMT before and after electrical inducing treatment were investigated and compared. The results indicate that the electrical field inducement contributes to the MMT disperse uniformly in LDPE and make the MMT layers turn along the direction parallel to the electrical field. The LDPE/MMT after electrical inducing has better capability to suppress the electrical trees under power frequency field.