Polybutylacrylate/poly （methyl methacrylate） Core-Shell Elastic Particles as Epoxy Resin Toughener: Part Ⅱ Toughness on DGEBA/DDM system

Jianli WANG, Myonghoon LEE, Kejian YAO Jianbin JI and Xiaomei YUZhejiang Key Laboratory of Green Chemistry Synthesis Technology, College of Chemical Engineering and Materials, Zhejiang University of Technology, Hangzhou 310014, ChinaResearch Center for Energy Conversion and Storage, Department of Polymer Science and Technology, Chonbuk National University, 664-1, Dukjin, Chonju, Chonbuk 561-756, Korea

摘 要：<正>Mechanlcal properties of epoxy resin were investigated by adding core-shell elastic particles （CSEP）. The results indicated that optimized core-shell ratio was 60/40 and the loading volume of CSEP was 10 phr （per hundred parts of epoxy resin by weight）. The impact strength of modified systems increased apparently with the decrease of core sizes. However, the shearing strength changed gently with the particle sizes. CSEP with lightly crosslinked rubbery core showed more effectiveness on toughness than others. With solution blending, CSEP could be dispersed in epoxy matrix well, and the morphologies of dispersed rubber domains were controlled perfectly by CSEP whose structure was predesigned. A cavitation-shearing band toughness mechanism was observed from the SEM micrographs of fracture surface. It also was found that the deforming temperature （DT） of modified epoxy did not decline apparently.

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