Impact fatigue of a polycarbonate/acrylonitrile-butadiene-styrene blend

NCUIR > Engineering College > Graduate Institute of Mechanical Engineering > journal & Dissertation > Item 987654321/26923

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26923

Title:	Impact fatigue of a polycarbonate/acrylonitrile-butadiene-styrene blend
Authors:	Ho,MH;Hwang,JR;Doong,JL;Fung,CP
Contributors:	機械工程研究所
Keywords:	MECHANICAL-PROPERTIES;RESIDUAL-STRESSES;COMPOSITES;POLYPROPYLENE;MORPHOLOGY;BEHAVIOR;POLYMERS;NYLON-6
Date:	1999
Issue Date:	2010-06-29 18:03:22 (UTC+8)
Publisher:	中央大學
Abstract:	This study analyzes the impact properties of a polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blend. The specimens were prepared under various injection molding conditions, including filling time, melting temperature, and mold temperature. Impact tests were performed with a Dynatup drop weight impact tester at different impact energies (10, 15, 20, 25 J). The fracture mechanism was examined with a scanning electron microscopy. The results indicated that the load-time history of the PC/ABS blend has approximately a sinusoidal form in impact. The best injection molding conditions are a filling time of 12 s, a melting temperature of 260 degrees C and a mold temperature of 80 degrees C. Tn this case, the specimen shows the highest energy absorbed in single impact, together with the highest impact number in impact fatigue. The impact number and the accumulation energy seem to follow an exponential curve as the impact energy decreases. The PC/ABS blend material clearly exhibited ductile fracture with a continuous reduction in strength by viscoplastic deformation. The higher the impact number, the higher the accumulation energy. The accumulation energy of impact fatigue with impact energy 10 J is about 35-45 times greater than the energy absorbed in single impact. Tearing, shear fracture, and plastic deformation are the major fracture mechanisms of the PC/ABS blend matrix in single impact and repeated impact conditions.
Relation:	POLYMER ENGINEERING AND SCIENCE
Appears in Collections:	[Graduate Institute of Mechanical Engineering] journal & Dissertation

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