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An emulsifier‐free core–shell polyacrylate/diacetone acrylamide emulsion with nano‐SiO 2 for room temperature curable waterborne coatings
Author(s) -
Wang RongMin,
Lv WeiHua,
He YuFeng,
Wang Yan,
Guo JunFeng
Publication year - 2010
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1407
Subject(s) - materials science , emulsion , emulsion polymerization , chemical engineering , monomer , nanoparticle , coating , polymer chemistry , particle size , dynamic light scattering , particle (ecology) , acrylamide , transmission electron microscopy , composite material , polymer , nanotechnology , oceanography , geology , engineering
An emulsifier‐free core–shell polyacrylate emulsion, containing nano‐SiO 2 nanoparticles in the core and diacetone acrylamide (DAAM) in the shell, has been successfully prepared by emulsifier‐free seeded emulsion polymerization. The effects of reaction temperature, dropping time, nano‐SiO 2 and initiator contents, and variation of the composition of core monomers on the amount of coagulum, particle size, and monomer conversion have been investigated. The particle morphology and the distribution of emulsion particles have been measured by transmission electron microscopy (TEM) and dynamic light scattering. The keto‐carbonyl groups on the surface of the polyacrylate emulsion nanoparticles reacted with adipic dihydrazide (ADH) to form a film with a cross‐linked network structure at room temperature. Therefore, the emulsifier‐free core–shell emulsion could be used as a two‐component room temperature curable waterborne coating. It was also found that the properties of the coating were clearly superior after using the cross‐linker. Copyright © 2009 John Wiley & Sons, Ltd.