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Title: Effect of blending sequence on the impact strength of PET/PC blends
Authors: Wu, Jing-Shen
Mai, Y. W.
Keywords: Impact strength
Blending sequence effect
PET/PC blends
Issue Date: 1998
Citation: Fracture and strength of solids : proceedings of the third International Conference on Fracture and Strength of Solids, Hong Kong, 8-10 December 1997, Trans Tech Pub., Uetikon-Zuerich, Switzerland, 1998, Part 2, p. 787-792
Abstract: The impact behavior of PET/PC/E-GMA-MA blends at different temperatures was studied. The relationships between the processing conditions, morphology and mechanical properties were discussed. It was revealed that the toughening effect due to the E-GMA-MA copolymer appears at just above its glass transition temperature, and the blending sequence has a strong influence on the morphology and impact toughness of the blends. The brittle-ductile transition of the blends made under optimum processing conditions takes place at a relatively low temperature and with a low elstomer content. The major toughening mechanisms were identified to be massive cavitation plus matrix shear yielding. Both SEM and TEM were employed to study the morphology and toughening mechanisms.
Description: This work is supported by Hong Kong Research Grants Council (Project No. HKUST810/96E).
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