标题：Tensile deformation mechanisms of ABS/PMMA/EMA blends
作者：Wang, S. H.; Gao, J.; Lin, S. X.; Zhang, P.; Huang, J.; Xu, L. L.
作者机构：[Wang, S. H.; Gao, J.; Lin, S. X.] Shandong Univ, Sch Mech Elect & Informat Engn, Weihai 264209, Peoples R China.; [Zhang, P.; Huang, J.; Xu, L. L.] 更多
会议名称：Global Conference on Polymer and Composite Materials (PCM)
会议日期：MAY 27-29, 2014
来源：2014 GLOBAL CONFERENCE ON POLYMER AND COMPOSITE MATERIALS (PCM 2014)
摘要：The tensile deformation mechanisms of acrylonitrile - butadiene - styrene (ABS) / polymethyl methacrylate (PMMA) blends toughened by ethylene methacrylate (EMA) copolymer was investigated by analysing the fracture morphology. ABS/PMMA was blended with EMA copolymer by melt mixing technique using co-rotating twin extruder. Tensile tests show that the elongation at break of ABS/PMMA blends can be efficiently improved with the increase in EMA content. Fracture morphology of ABS/PMMA/EMA blends reveals that the material yield induced by hollowing-out of EMA particles and its propagation into yield zone is the main toughening mechanism. Moreover, the appearance that EMA particles in the central area are given priority to hollowing- out may be related to the skin-core structure of the injection moulded parts caused by the different cooling rate between surface and inside in the process of injection moulding.