Jute/polypropylene composites I. Effect of matrix modification |
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| Affiliation: | 1. Akdagmadeni Vocational High School, Bozok University, Akdagmadeni, Yozgat, Turkey;2. Department of Textile Engineering, Erciyes University, Kayseri, Turkey;1. Doshisha University, Department of Mechanical and Systems Engineering, 1-3 Tataramiyakodani, Kyotanabe, Kyoto, Japan;2. Kobe Steel, Mechanical Engineering Research Laboratory, 1-5-5 Takatsukadai, Kobe, Hyogo, Japan;3. Graduate School of Doshisha University, 1-3 Tataramiyakodani, Kyotanabe, Kyoto, Japan;1. LMPEQ, University of Cadi Ayyad, ENSA, Safi 46 000, Morocco;2. LAPLACE, University of Paul Sabatier, Toulouse 31 062, France;3. LPCMA, University of Hassan II, Casablanca 7955, Morocco;4. LASMAR, University of Moulay Ismail, Meknes 11 201, Morocco;1. Department of Mechanical Engineering, T. John Institute of Technology, Bangalore-560083, Karnatak, India;2. Department of Mechanical Engineering, B.M.S.Institute of Technology, Bangalore-560064, Karnatak, India;3. Department of Mechanical Engineering, Acharya Institute of Technology, Bangalore-560107, Karnatak, India;4. Department of Mechanical Engineering, R.V. College of Engineering, Bangalore-560059, Karnatak, India |
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| Abstract: | Natural fibre-reinforced polymers can exhibit very different mechanical performances and environmental aging resistances depending on their interphase properties, but most studies have been focused on fibre surface treatment. Here, investigations of the effect of maleic anhydride grafted polypropylene (MAHgPP) coupling agents on the properties of jute fibre/polypropylene (PP) composites have been considered with two kinds of matrices (PP1 and PP2). Both mechanical behaviour of random short fibre composites and micro-mechanical properties of single fibre model composites were examined. Taking into account interfacial properties, a modified rule of mixture (ROM) theory is formulated which fits well to the experimental results. The addition of 2 wt% MAHgPP to polypropylene matrices can significantly improve the adhesion strength with jute fibres and in turn the mechanical properties of composites. We found that the intrinsic tensile properties of jute fibre are proportional to the fibre’s cross-sectional area, which is associated with its perfect circle shape, suggesting the jute fibre’s special statistical tensile properties. We also characterised the hydrophilic character of natural fibres and, moreover, humidity environmental aging effects. The theoretical results are found to coincide fairly well with the experimental data and the major reason of composite tensile strength increase in humidity aging conditions can be attributed to both improved polymer–matrix and interfacial adhesion strength. |
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