Chapter 4 Morphology and Fractography Fractography of ABS Hiromi Kita, Masatoshi Higuchi, Atsushi Miura National Institute of Technology and Evaluation, Takashi Kuriyama, Ikuo Narisawa, Yamagata University, Japan INTRODUCTION Failure analysis of plastic products is significantly difficult due to the insufficient system- atic data of plastics. In order to solve this essential problem and to develop the technology to determine the cause of product failure, the systematic data for the fracture surface informa- tion and material strength of polymers have been required. In this paper, the application of fractography has been examined aiming on ABS polymers, which are broadly used as gen- eral consumer products and structural materials. Through the comparison of the fracture surface information obtained as a result of the experiments carried out under static and cyclic loading, the influences of repeated loading, notch, grades, loading level and ambient temperature on the fracture surfaces have been investigated. EXPERIMENTAL Three grades of ABS (Acrylonitrile-butadiene-styrene copolymer), heat resistant (material A), high rigid (material B) and flame resistant (material C) grades were used in this study as listed in Table 1. Table 1. Experimental materials Materials : ABS (Grades) A(Heat Resistant) B (High Rigidity) C (Flame Resistant) Molecular weight 120,000 140,000 120,000 Flexural strength, MPa 73.5 78.4 65.7 Flexural modulus, MPa 2450 2548 2254 Impact strength, kJ/m 2 14.7 9.8 12.7
Morphology and Fractography Fractography of ABS
Jun 24, 2023
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