文献类型：期刊文献

中文题名：炭黑填充聚丙烯/尼龙6/玻璃纤维复合材料的制备及表征

英文题名：Preparation and Characterization of Carbon Black Filled Polypropylene/Polyamide 6/Glass Fiber Composites

作者：张雪薇[1];吴唯[1];刘江[1];宗孟静子[1]

机构：[1]华东理工大学材料科学与工程学院中德先进材料联合研究中心,上海200237

年份：2019

卷号：32

期号：3

起止页码：381

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

语种：中文

中文关键词：PP/PA6;炭黑;玻璃纤维;导电网络

外文关键词：PP/PA6;carbon black;glass fiber;conductive network

摘要：以聚丙烯(PP)和尼龙6(PA6)的共混物为基体材料,以导电炭黑(CB)和玻璃纤维(GF)作为填料,通过熔融共混的方法制备了导电复合材料。研究了GF和CB质量分数对复合材料热稳定性、导电性能、力学性能和微观形貌的影响。结果表明:CB粒子选择性分散在PA6中,同时PA6包覆在GF表面,通过具有较大长径比的纤维相互搭接形成连续的网络结构,从而显著降低复合材料的逾渗阈值。在相同CB质量分数下(2%),PP/PA6/GF/CB的表面电阻率相对于PP/PA6/CB体系降低了5个数量级。此外,引入GF后,材料的热稳定性和拉伸强度都有所提高。
Carbon black (CB) filled polypropylene (PP) with surface resistivity of 10 6-10 9 Ω is the ideal antistatic plastic material in electron-electric industry. However, the large amount of CB may have adverse effect on the mechanical properties and processing performance of the material. CB and glass fiber (GF) were added to the mixture of PP and polyamide 6 (PA6) through melt-blending process to fabricate a conductive composite with low electrical percolation threshold. The influence of the mass fraction of fillers towards thermal stability, electrical conductivity, mechanical properties and morphology were investigated. SEM results showed that CB particles were selectively dispersed in PA6 phases due to the good interaction and interfacial adhesion between CB and PA6. Meanwhile, the surface of GF was covered with PA6, and the GF with high aspect ratio formed a continuous structure by interconnections, which greatly decreased the percolation threshold of the composite. Under the same mass fraction of CB (2%), the surface resistivity of PP/PA6/GF/CB decreased by 5 orders of magnitude compared with PP/PA6/CB. In the PP/PA6/GF (mass fraction: 80/10/10) system, the thermal stability of the composites were improved because of the introduction of inorganic particles. Besides, GF formed a network structure inside the matrix, which hindered the movement of PP and PA6 molecular chains and lowered the crystallization temperature. The dielectric constant, dielectric loss, and AC conductivity all showed an upward trend as the mass fraction of CB increased, and percolation occurred near 2%-3%(mass fraction). With the increase of CB and GF mass fraction, the tensile strength of PP/PA6/GF/CB system gradually increased, and the elongation at break remained basically unchanged.