Influence of processing methods on dispersion, electrical and mechanical properties of MWCNTs/PVC composites

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Applied Physics A Pub Date : 2025-04-21 DOI:10.1007/s00339-025-08522-x

Yueqing Ren, Xiaojie Sun, Meng Jiang, Bo Feng, Zhihua Han, Yafei Li

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引用次数: 0

Abstract

Multi-walled carbon nanotubes-filled polyvinyl chloride (MWCNTs/PVC) composites are prepared using four processing methods: a conical twin-screw (CTS) extruder, a Haake mixing apparatus, and parallel twin-screw (PTS) extruders with screw length/diameter ratios of 40:1 and 48:1, respectively. The influences of processing methods on filler dispersion, electrical, dynamic, mechanical properties, as well as thermal stability of MWCNTs/PVC composites are investigated. There are many large-sized (hundreds of micrometers) MWCNTs bundles and aggregates in the CTS extruded samples, and the dispersion is the worst. The PTS extruded MWCNTs/PVC composites have relatively better dispersion and the dispersion improves with increase in length/diameter ratio of the screw. The MWCNTs/PVC sample, prepared using the Haake mixer, mixed for 10 min, shows the best dispersion. Improvement of MWCNTs dispersion affects the thermal, electrical and mechanical properties of the composites, leading to increases in surface conductivity, glass transition temperature, flexural modulus, Young’s modulus, and impact strength of the MWCNTs/PVC composites.

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加工方法对 MWCNTs/PVC 复合材料的分散、电气和机械性能的影响

采用锥形双螺杆（CTS）挤出机、Haake混合机和螺杆长径比分别为40:1和48:1的平行双螺杆（PTS）挤出机四种加工方法制备了多壁碳纳米管填充聚氯乙烯（MWCNTs/PVC）复合材料。研究了加工方法对MWCNTs/PVC复合材料的填料分散性、电学性能、动力学性能、力学性能和热稳定性的影响。CTS挤压样品中存在许多大尺寸（数百微米）的MWCNTs束和聚集体，分散性最差。PTS挤出的MWCNTs/PVC复合材料具有较好的分散性，随着螺杆长径比的增加，分散性得到改善。使用Haake混合器制备的MWCNTs/PVC样品，混合10 min，分散性最佳。MWCNTs分散性的改善会影响复合材料的热学、电学和力学性能，导致MWCNTs/PVC复合材料的表面电导率、玻璃化转变温度、弯曲模量、杨氏模量和冲击强度的增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics A 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.40%

发文量

964

审稿时长

38 days

期刊介绍： Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.