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Dynamics in Poly(ϵ‐ C aprolactone) Containing Phase Separated Epoxy Thermosets
Author(s) -
Lützen Hendrik,
Hartwig Andreas
Publication year - 2013
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/mame.201200435
Subject(s) - thermosetting polymer , epoxy , materials science , polymer , polymerization , phase (matter) , dynamic mechanical analysis , polymer chemistry , covalent bond , composite material , chemical engineering , organic chemistry , chemistry , engineering
The dynamic phase separation of poly(ϵ‐caprolactone) (PCL) in cationically polymerized, cycloaliphatic epoxy thermosets is presented. While phase separation processes are commonly unknown from thermosetting polymers due to the covalently crosslinked polymer structure, the gradually occurring formation of crystalline ordered PCL domains is observed. The dynamic process is accompanied by a strong increase in the mechanical moduli and strengthening of the polymer due to the formation of finely distributed domains. Regarding the network and domain structure of the polymer during the dynamic process, the results show rearrangements mainly in the linear PCL segments driven by crystalline interactions without changes in the epoxy matrix polymer.