Miscibility Between Ethylene Vinyl Acetate Copolymers and Tackifier Resins |
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| Authors: | Mototsugu Takemoto Takuma Karasawa Hiroshi Mizumachi Mikio Kajiyama |
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| Affiliation: |
a Department of Biomaterial Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
b Institute of Agricultural and Forest Engineering, University of Tsukuba, Tsukuba-si, Ibaraki, Japan |
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| Abstract: | A series of ethylene vinyl acetate copolymer (EVA) were blended with various kinds of tackifiers and the miscibility between the components was investigated. The miscibility of the blend is illustrated as a phase diagram. The EVA and modified rosin systems tended to have a phase diagram with lower critical solution temperature (LCST), whereas the EVA and petroleum resin systems tended to have that with upper critical solution temperature (UCST). The phase diagrams of EVA/tackifier resins systematically changed as VAc content in the copolymer increased, which is accounted for by the classical Flory-Huggins theory. |
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| Keywords: | Hot-melt adhesive EVA tackifier miscibility phase diagram UCST LCST miscible window Flory-Huggins theory |
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