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Versatile Platform for Controlling Properties of Plant Oil-Based Latex Polymer Networks
journal contribution
posted on 2018-01-02, 00:00 authored by Zoriana Demchuk, Ananiy Kohut, Stanislav Voronov, Andriy VoronovA series
of latexes from acrylic monomers (made from olive, soybean,
linseed, and hydrogenated soybean oils), significantly different in
terms of fatty acid unsaturation, were synthesized using miniemulsion
copolymerization with styrene. The number-average molecular weight
and the glass transition temperature of the resulting copolymers with
high levels of biobased content (up to approximately 60 wt %) depend
essentially on the amount of unsaturation (the number of double bonds
in triglyceride fatty acid fragments of plant oil-based monomers)
in the reaction feed. When plant oil-based latex films are oxidatively
cured, the linear dependence of the cross-link density on reaction
feed unsaturation is observed. Dynamic mechanical and pendulum hardness
measurements indicate that the properties of the resulting plant oil-based
polymer network are mainly determined by cross-link density. On the
basis of the linear dependence of the cross-link density on monomer
feed unsaturation, it can be concluded that the latex network formation
and thermomechanical properties can be adjusted by simply combining
various plant oil-based monomers at certain ratios (“given”
unsaturations) in the reaction feed. Assuming a broad variety of plant/vegetable
oils available for new monomers synthesis, this can be considered
as a promising platform for controlling properties of plant oil-based
latex polymer networks.