Citation: SUN Yishi, ZHAO Shiqi, LIN Xiuying, WANG Xiqun. STUDY ON THE TOUGHENING MECHANISM OF RUBBER TOUGHENED EPOXY[J]. Chinese Journal of Polymer Science, ;1986, 4(3): 229-234. shu

STUDY ON THE TOUGHENING MECHANISM OF RUBBER TOUGHENED EPOXY

Received Date: 15 August 1985

The following factors affecting the rubber toughened epoxy resin system were studied: 1. kindsof curing agent used, 2. the Mc value of the matrix, 3. the bonding foce between the dispersed phaseand the matrix. Our experimental result indicates that the average chain length between crosslinks(Mc) is a much more important affecting factor. Chemical bonding between the dispersed phaseand the matrix is also important. A toughening mechanism of rubber toughened epoxy has beenproposed. In the material with relatively low crosslinking density,extensive fracture process strip is formed which is induced by the combined stress field near the rubber particles.The chemical bonding between the dispersed phase and the matrix may increase the strength of the local stress field about the rubber particles which is in favor of broading the fracture process area.
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