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The structure and properties of acrylic‐polyurethane hybrid emulsions and comparison with physical blends
Author(s) -
Kukanja D.,
Golob J.,
ZupančičValant A.,
Krajnc M.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20001003)78:1<67::aid-app100>3.0.co;2-4
Subject(s) - materials science , polyurethane , emulsion polymerization , acrylate , ultimate tensile strength , emulsion , butyl acrylate , composite material , glass transition , acrylic acid , methyl methacrylate , polymerization , polymer chemistry , monomer , chemical engineering , polymer , engineering
Abstract Aqueous acrylic‐polyurethane hybrid emulsions were prepared by semibatch emulsion polymerization of a mixture of acrylic monomers (butyl acrylate, methyl methacrylate, and acrylic acid) in the presence of polyurethane dispersion. Equivalent physical blends were prepared by mixing acrylic emulsion and polyurethane dispersion. The weight ratio between acrylic and polyurethane components varied to obtain different emulsion properties, microphase structure, and mechanical film properties of hybrid emulsions and physical blends. Particle size and molecular mass measurements, scanning electron microscopy, glass transition temperature, and rheological measurements performed characterization of the latex system. The mechanical properties were investigated by measuring tensile strength and Koenig hardness of dried films. The experimental results indicate better acrylic‐polyurethane compatibility in hybrid emulsions than in physical blends, resulting in improved chemical and mechanical properties. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 67–80, 2000