Influence of interphase dispersion state of nanoparticles on crystal morphology and dielectric properties in montmorillonite elastomer/polypropylene composites

被引：0

作者：

Gao J. ^{[1
]}

Yao Z. ^{[1
]}

Liu Y. ^{[1
]}

Liu H. ^{[1
]}

Wang R. ^{[1
]}

Liu L. ^{[1
]}

Guo N. ^{[1
]}

Li L. ^{[1
]}

机构：

[1] Key Laboratory of Engineering Dielectrics and Its Applications, Ministry of Education, Harbin University of Science and Technology, Harbin

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 04期

基金：

中国国家自然科学基金;

关键词：

cable; crystal morphology; dielectric properties; interphase dispersion state; montmorillonite; polypropylene;

D O I：

10.13801/j.cnki.fhclxb.20220606.001

中图分类号：

学科分类号：

摘要：

With the increasing demand for cable, environmental protection and energy-saving insulation has become a new development trend, and the research and development of polypropylene (PP) has become the first choice of dielectric researchers. In order to improve dielectric properties of polypropylene-elastomer blends, MMT-POE/PP nano-modified blends were prepared by two-step melting blending method with two different compatibilizers and organically treated montmorillonite (MMT). And then the effects of interphase dispersion states of nanoparticles in different phase zones on dielectric properties of nano-modified blends were investigated. The microstructure, crystalline morphology and crystallization parameters were characterized by SEM, electrostatic force microscopy (EFM), polarizing microscope (PLM) and DSC. The micro-mechanism of phase dispersion on MMT-POE/PP composites was discussed through the breakdown properties test of the blend sample. The experimental results show that when MMT layers tend to disperse in the PP phase, the crystallization size decreases about 5.9 µm, the crystallization speed increases, and the crystallinity increases about 2.1%. And then the dielectric constant and insulation conductivity decrease obviously, and the alternating current (AC) breakdown field strength increases from 82.69 kV/mm to 95.16 kV/mm. The dielectric properties of nano-modified blends can be positively improved by regulating the tendency of nanoparticles to disperse uniformly in the PP phase. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

引用

页码：2085 / 2095

页数：10

共 27 条

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