Title: Synthesis, structure and properties of water-based ambient self-crosslinkable polyacrylate emulsion
Abstract: Using methyl methacrylate (MMA), butyl acrylate (BA), acrylic acid (AA) and diacetone acrylamide (DAAm) as the comonomers, a series of ambient self-crosslinking water-based polyacrylate emulsions with coreshell structure were synthesized via semi-continuous seed emulsion polymerization process. With sodium dodecyl sulfate (SDS) and octylphenol polyoxyethylene ether (OP-10) as composite emulsifier, the effect of its dosage on polymerization reaction stability was studied. The size distribution of latex particles, water resistance and mechanical performance of the films with different dosages of DAAm were discussed. A preferable dosage was ascertained as follows: dosage of composite emulsifier is 3.0% monomers’ mass and mass fraction of DAAm is 4%. The TEM images of the latexes confirmed that the core-shell structure is obtained. Thermal analysis indicated that with adipic dihydrazide (ADH) as crosslinking agent, the glasstransition temperature of the film after crosslinking is remarkably enhanced. The crosslinking reaction between ketone of the polymer and hydrazine was confirmed by FT-IR spectra.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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