The Surface Structure and Properties of Films of Latex Blends Based on Vinyl Acetate Copolymer


  • Vilma ŠIPAILAITĖ-RAMOŠKIENĖ∗, Kazys Vytautas MICKUS, Igoris PROSYČEVAS, Asta GUOBIENĖ, Viktoras GRIGALIŪNAS Kaunas University of Technology


copolymer blends, vinyl acetate copolymer, VeoVa-11 copolymer, latex films, atomic force microscopy, scanning electron microscopy.


The possibility to use water based vinyl acetate / butyl acrylate (VA/BA) copolymer blends with various content of vinyl ester Versatic acid / metyl methacrylate / 2-ethylhexylacrylate / acrylic acid (VeoVa-11/MMA/2-EHA/AA) copolymer for the preparation of adhesive joints have been investigated. The latex film surface structure was studied by atomic force microscopy and scanning electron microscopy. The adhesion, physical and mechanical properties of both pure components and blends have been determined, also.
Blending with effective content of VeoVa-11/MMA/2-EHA/AA copolymer (up to 20 wt.%) and thermal reactivation enhances peel strength of VA/BA copolymer, because of expeditious latex particle coalescence. The same reason makes lesser the swelling value of latex blend film for ∼ 1.5 times after annealing. Low content of VeoVa-11/MMA/ /2-EHA/AA copolymer (up to 5 wt. %) lends VA/BA copolymer latex film best mechanical properties. Higher content of additive (>20 wt.%) increases the resistance to heat of latex blend film.