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Published in: Journal of Coatings Technology and Research 3/2022

16-01-2022

Preparation and characterization of self-crosslinking acrylate emulsion modified by divinyl silane

Published in: Journal of Coatings Technology and Research | Issue 3/2022

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Abstract

The divinyl silane modified self-crosslinking polyacrylate latex was successfully prepared by semicontinuous seeded emulsion polymerization. Methyl methacrylate (MMA) and butyl acrylate (BA) were used as main monomers and the reaction was initiated by potassium persulfate (KPS). The modified monomer 1, 3-divinyltetramethyldisiloxane (DVMS) and crosslinked monomer hydroxyethyl acrylate (HEA) were introduced into the basic dispersion. Sodium dodecyl sulfonate (SDS) anionic surfactant and alkyl polyglycoside (APG) nonionic emulsifier were utilized as composite emulsifiers. The structure of latex film was characterized by Fourier transform infrared spectroscopy (FTIR). The latex films were tested by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and contact angle (CA) and apparent crosslinking percentage. The particle size of the emulsion was measured by Zetatrac dynamic light scattering instrument. The optimum conditions are as follows: the amount of composite emulsifier is 5.0%, the mass ratio of SDS to APG is 1:1, the amount of initiator is 0.5%, the amount of DVMS is 5.0%, and the amount of HEA is 1.0%. The emulsion has good mechanical stability and chemical stability, and the storage stability is ideal. The dispersion is blue and translucent, with a small particle size. The apparent crosslinking percentage of the latex film is above 89%, and the highest contact angle was more than 98°. The polyacrylate colloidal film prepared in this paper has outstanding thermal stability and hydrophobicity.

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Metadata
Title
Preparation and characterization of self-crosslinking acrylate emulsion modified by divinyl silane
Publication date
16-01-2022
Published in
Journal of Coatings Technology and Research / Issue 3/2022
Print ISSN: 1547-0091
Electronic ISSN: 1935-3804
DOI
https://doi.org/10.1007/s11998-021-00566-x

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