Preparation and Characterization of Soap-Free Vinyl Acetate/Butyl Acrylate Copolymer Latex
School of Resources, Environment and Materials, Guangxi university, Nanning 530000, China
Author to whom correspondence should be addressed.
Materials 2020, 13(4), 865; https://doi.org/10.3390/ma13040865
Received: 7 January 2020 / Revised: 11 February 2020 / Accepted: 13 February 2020 / Published: 14 February 2020
The soap-free emulsion of vinyl acetate (VAc)/butyl acrylate (BA) copolymer was prepared by a semi-continuous and pre-emulsification polymerization method, using ammonium sulfate allyloxy nonylphenoxy poly(ethyleneoxy) (10) ether (DNS-86) as a reactive emulsifier. The effects of DNS-86 on the stability of the emulsion and the properties of the latex film were investigated. The infrared spectrum, thermal stability, glass transition temperature and micromorphology of latex were also studied. The results showed that the emulsion had the best stability and the conversion rate reached a maximum of 98.46% when the DNS-86 amount was 4 wt % of the total amount of monomers. Compared with the PVAc latex synthesized with octylphenol polyoxyethylene ether (10) (OP-10), the latex prepared with DNS-86 has higher thermal stability and ionic stability, whereas the latex film has better water resistance.