Toughening of electron-beam cured acrylate resins
2000 (English)In: Macromolecular materials and engineering (Print), ISSN 1438-7492, E-ISSN 1439-2054, Vol. 280, no 08-jul, 20-25 p.Article in journal (Refereed) Published
The aim of this study was to improve the toughness of EB-cured acrylate thermost resins by using hyperbranched aliphatic polyesters as additives to obtain a liquid-liquid phase-separated resin. The hyperbranched polyester can be considered as a hydroxyl functional scaffold, on which functional groups were reacted by control phase separation and crosslinking. Alkyl chains of different lengths attached to the scaffold controlled phase separation. The amount of crosslinking within the rubbery particle and between the particles and the matrix was set by the percentage of methacrylate groups. A good phase separation was obtained; therefore, T-g decreased only slightly compared to the pure acrylate. The K-IC value of the cured resins was increased by 30%. The phase-separated resins showed stability with time and no significant increase in particle size was noticed after 18 months.
Place, publisher, year, edition, pages
2000. Vol. 280, no 08-jul, 20-25 p.
induced cationic polymerization, fiber-reinforced composites, polymers
IdentifiersURN: urn:nbn:se:kth:diva-19992ISI: 000088960400004OAI: oai:DiVA.org:kth-19992DiVA: diva2:338685
QC 201005252010-08-102010-08-10Bibliographically approved