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Highly Improved Microstructure and Properties of Poly(p-phenylene terephthalamide) Paper-based Materials via Hot Calendering Process

查看全文 作　　者：Bin [1,2,4]Yang;ZhaoQing [1,3,4]Lu;MeiYun [1,3,4]Zhang;ShunXi [1,3,4]Song;RuNan [1]Wang 高影响力作者 机构地区：[1]College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science &Technology, Xi' an, Shaanxi Province, 710021, China;[2]School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi' an, ShaanxiProvince, 710072, China;[3]Shaanxi Provincal Key Laboratory of Papermaking Technology and Specialty Paper Development,Xi' an, Shaanxi Province, 710021, China;[4]National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science & Technology, Xi'an, Shaanxi Province, 710021, China高影响力机构 出　　处：《Paper And Biomaterials》索引2017年第2卷第3期,共9页高影响力期刊 基　　金：the financial support to this research from the open fund of state key laboratory for modification of chemical fibers and polymer materials (LK1601);projects of education department of Shaanxi provincial government (15JF012);National Natural Science Foundation of China (51402180) 摘　　要：In this study,the effect of hot calendering process on the microstructure and properties of poly(p-phenylene terephthalamide)(PPTA) paper-based materials was investigated.The microstructures of the fracture surface,crystalline structure,and single fiber strength of the PPTA paperbased materials as well as the different bonding behaviors between the PPTA fibers and PPTA fibrids obtained before and after the hot calendering process were examined.The results indicated that a high linear pressure would result in a limited improvement of the strength owing to the unimproved paper structure.The optimal values of tensile index and dielectric strength of 56.6 N·m/g and 27.6 kV/mm,respectively,could only be achieved with a synergistic effects of hot calendering temperature and linear pressure(240℃ and 110 k N/m,respectively).This result suggested it was possible to achieve a significant reinforcement and improvement in the interfacial bonding of functional PPTA paper-based materials,and avoid the formation of unexpected pleats and cracks in PPTA paper-based materials during the hot calendering process. 关 键 词：PPTA paper-based materials hot calendering interfacial bonding crystalline structure PPTA fiber
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