Plastics, Rubber and Composites: Macromolecular Engineering最新文献

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Crystallization induced segregated structure for outstanding conductive property with low percolation threshold 结晶诱导偏析结构可实现出色的导电性能和较低的渗流阈值

Plastics, Rubber and Composites: Macromolecular Engineering Pub Date : 2024-02-01 DOI: 10.1177/14658011231218951

Beixue Yang, Zhangbin Yang, Z. Zhou, Jun Zhang, Jianning Bao

{"title":"Crystallization induced segregated structure for outstanding conductive property with low percolation threshold","authors":"Beixue Yang, Zhangbin Yang, Z. Zhou, Jun Zhang, Jianning Bao","doi":"10.1177/14658011231218951","DOIUrl":"https://doi.org/10.1177/14658011231218951","url":null,"abstract":"Conductive polymer composites (CPCs) are promising alternatives to metal conductive materials due to their light-weight and low-cost. This work investigates the effect of the crystallization behavior of the matrix on the electrical property of CPCs, where semi-crystalline polypropylene (PP) and amorphous styrene-butadiene-styrene tri-block copolymer (SBS) are selected as a matrix, respectively, and conductive carbon black (CB) particles are introduced into matrixes by melting blending. Based on the electrical properties of CPCs with various CB contents and percolation theory, the percolation threshold of 1.8 vol% in PP matrix composites is obtained, much lower than that of SBS matrix composites (5.4 vol%). The analysis with a polarizing microscope and differential scanning calorimeter confirms that such a significant difference in percolation threshold between two composites is due to the crystallization behavior while the crystallization induced segregated structure is proposed. Finally, the rheology behaviors and mechanical properties are characterized for microstructures and applications, respectively.","PeriodicalId":518051,"journal":{"name":"Plastics, Rubber and Composites: Macromolecular Engineering","volume":"269 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140529021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of Lorenz number of composite films based on copper chloride(II) in polyvinyl alcohol matrix 测定聚乙烯醇基质中基于氯化铜（II）的复合薄膜的洛伦兹数

Plastics, Rubber and Composites: Macromolecular Engineering Pub Date : 2024-02-01 DOI: 10.1177/14658011231212629

Mohammed Tweissi, J. M. Khoshman, Husam Miqdad, A. Adaileh

{"title":"Determination of Lorenz number of composite films based on copper chloride(II) in polyvinyl alcohol matrix","authors":"Mohammed Tweissi, J. M. Khoshman, Husam Miqdad, A. Adaileh","doi":"10.1177/14658011231212629","DOIUrl":"https://doi.org/10.1177/14658011231212629","url":null,"abstract":"The electrical and thermal conductivities as well as Lorenz number of polyvinyl alcohol (PVA) composites have been investigated at different concentrations of the copper chloride II (0, 1, 3, 5, 7 and 12 wt-%). The powder of copper chloride II (CuCl2) was casted with the PVA polymer1. The electrical conductivity was measured by using the impedance technique, and it was studied as functions of the CuCl2 concentrations, applied frequency range of 100–7000 kHz, and temperature range of 30–100 °C. The activation energy ( Ea) was also determined for all the studied samples at applied frequency of 1000 kHz. It was found that the Ea decreased with increasing the CuCl2 concentration. Moreover, the thermal conductivity of the samples was studied as functions of the CuCl2 concentration and temperature. It was found that the thermal conductivity increased with increasing the CuCl2 concentrations and temperature. Using the measured values of the thermal and electrical conductivities of the studied samples, the relationship between the Lorenz number ( L) of the PVA and CuCl2 concentrations with constant temperature was also studied based on the Wiedemann–Franz law. The results showed that the L number increased with CuCl2 concentrations increase at constant temperature.","PeriodicalId":518051,"journal":{"name":"Plastics, Rubber and Composites: Macromolecular Engineering","volume":"260 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140529023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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