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Toughening of electron‐beam cured acrylate resins
Author(s) -
Glauser Thierry,
Hult Anders,
Johansson Mats,
Kornmann Xavier,
Berglund Lars
Publication year - 2000
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20000801)280:1<20::aid-mame20>3.0.co;2-8
Subject(s) - materials science , thermosetting polymer , acrylate , polyester , monomer , composite material , toughness , methacrylate , copolymer , phase (matter) , particle size , polymer chemistry , particle (ecology) , chemical engineering , polymer , organic chemistry , chemistry , oceanography , engineering , geology
The aim of this study was to improve the toughness of EB‐cured acrylate thermoset 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 to 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.