UV-curable hyperbranched nanocomposite coatings
2006 (English)In: Progress in organic coatings, ISSN 0300-9440, Vol. 55, 284-290 p.Article in journal (Refereed) Published
Nanoparticles have been used to reinforce polymer matrices since the late 1980s, with promising results. Hyperbranched polymers are densely branched molecules with a globular structure, leading to lower viscosity and many end-groups, creating property-designing opportunities. Here, the two research areas, nanocomposites and hyperbranched polymers, were combined to investigate the possibility of creating a nanocomposite resin, in order to prepare a UV-curable coating system. Nanocomposites were prepared from the hyperbranched polyester Boltorn (R) H30, acrylated to 30% and 70%, and the unmodified layered silicate Na(+)montmorillonite, added both before and after the acrylation of Boltorn (R) H30. Films prepared from 30% acrylated Boltorn (R) H30 with clay added after the acrylation, having a mainly exfoliated structure according to X-ray and TEM, exhibited the largest property improvement, compared with the unfilled film. These property improvements comprised a harder surface, better scratch resistance, better adhesion to metal substrates and a small improvement in flexibility.
Place, publisher, year, edition, pages
2006. Vol. 55, 284-290 p.
LAYERED SILICATE NANOCOMPOSITES; POLYMER/MONTMORILLONITE CLAY NANOCOMPOSITES; BARRIER PROPERTIES; POLYMER; MONTMORILLONITE; HYBRID; WATER
IdentifiersURN: urn:nbn:se:kth:diva-13479DOI: 10.1016/j.porgcoat.2005.12.003ISI: 000236079300010ScopusID: 2-s2.0-33244468561OAI: oai:DiVA.org:kth-13479DiVA: diva2:325526