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Mechanical properties of basalt fibers and their adhesion to polypropylene matrices
Affiliation:1. Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy;2. ENEA – Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Technical Unit for Materials Technologies, Brindisi Research Centre, S.S. 7, Km. 706, 72100 Brindisi, Italy;1. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea;2. Ceramic Fiber and Composite Materials Center, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju-si, Gyeongsangnam-do 52851, Republic of Korea;3. Department of Fiber System Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Gyeonggi-do 16890, Republic of Korea;1. Department of Chemistry, Inha University, 100 Inharo, Incheon, Republic of Korea;2. Department of Mechanical Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea;1. Università degli Studi di Palermo, DICAM, Viale delle Scienze, 90128, Palermo, Italy;2. Università degli Studi di Palermo, DICGIM, Viale delle Scienze, 90128, Palermo, Italy;1. Department of “Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali”, University of Palermo, 90128 Palermo, Italy;2. CNR ITAE, Via Salita Santa Lucia sopra Contesse 5, 98126 Messina, Italy;1. School of Metallurgy, Northeastern University, Shenyang, Liaoning, China;2. Engineering Research Center of Ministry of Education for Advance Materials Preparation Technology Shenyang, Liaoning, China;3. TIANCHENG Environmental Protection Technology Co., Ltd, Fushun, Liaoning, China;1. International Institute for Urban Systems Engineering, Southeast University, Nanjing 210096, China;2. National & Local Joint Engineering Research Center of “Basalt fiber production and application”, Southeast University, Nanjing 210096, China
Abstract:This work is aimed to study the mechanical properties of basalt fibers, and their adhesion to polypropylene (PP) matrices. Single filament tensile tests were used to calculate the strength of different types of fibers, characterized by different providers and surface treatment. Single fiber fragmentation tests (SFFT) were used to calculate the critical length of the fibers, in a homopolymer PP matrix and in a maleic anhydride modified PP matrix. It was shown that the tensile strength of the fibers is not significantly influenced by the origin or the surface treatment. Only fibers without any sizing show very reduced mechanical properties. On the other hand, the tensile strength was shown to be severely dependent on the filament length. Weibull theory was used in order to calculate the fitting parameters σ0 and β, which were necessary in order to extrapolate the tensile strength to the critical length determined by SFFT. This allowed calculating the adhesion properties of the basalt fibers. It was shown that fiber–matrix adhesion is dependent on both the presence of sizing on the fiber surface, as well as on the modification of the matrix.
Keywords:Basalt fibers  B  Mechanical properties  B  Fiber/matrix bond  A  Thermoplastic resin
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