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Effect of Plasticizer on Physical Properties of Poly(vinyl acetate-co-ethylene) Emulsion  

Choi, Yong-Hae (Division of Chemical Engineering, Pukyong National University)
Lee, Won-Ki (Division of Chemical Engineering, Pukyong National University)
Publication Information
Applied Chemistry for Engineering / v.20, no.4, 2009 , pp. 459-463 More about this Journal
Abstract
In this study, physical properties of poly(vinyl acetate-co-ethylene) (VAE) emulsion were investigated by adding different amounts of di-butyl phthalate (DBP) which is a common plasticizer of VAE. The glass transition temperature $(T_g)$ of the dried plasticized VAE emulsion film, which measured by Differential Scanning Calorimeter, was decreased with increasing the DBP contents while the viscosity of the plasticized VAE emulsion was increased with the DBP contents. These results suggest that the plasticizer in the dried VAE film can prevent the strong interaction between chains, resulted by the decrease of $T_g$. In the emulsion, however, the particle sizes were swelled by the penetration of plasticizers and then its viscosity increased with the DBP content. When the DBP was added, the mechanical properties of the plasticized VAE films, such as tensile strength, elongation and creep resistance, were decreased while the water resistance was increased.
Keywords
Vinyl acetate-co-ethylene; emulsion; butyl phthalate; plasticizer;
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