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Dielectric and dynamic mechanical studies on homogeneous PBA/PBMA interpenetrating polymer networks
Author(s) -
Pissis Polycarpos,
Kyritsis Apostolos,
Meseguer Dueñas José Maria,
Monleón Pradas Manuel,
Torres Escuriola Débora,
Gallego Ferrer Gloria,
Gómez Ribelles José Luis
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200106)171:1<151::aid-masy151>3.0.co;2-9
Subject(s) - materials science , miscibility , compatibilization , dynamic mechanical analysis , branching (polymer chemistry) , butyl acrylate , methacrylate , acrylate , glass transition , polymer , polymer chemistry , dielectric spectroscopy , polymer blend , dielectric , composite material , chemical engineering , polymerization , copolymer , chemistry , optoelectronics , electrode , electrochemistry , engineering
Broadband dielectric relaxation spectroscopy (DRS, 10 −2 ‐10 9 Hz), thermally stimulated depolarization currents (TSDC) techniques and dynamic mechanical analysis (DMA) were employed to investigate the dynamic glass transition and, thus, phase morphology in sequential IPNs of poly(butyl acrylate) (PBA) and poly(butyl methacrylate) (PBMA) with 10 weight % of ethyleneglycol dimethacrylate (EGDMA) as branching agent. In a parallel investigation, similar IPNs with only 0.1% branching agent showed clearly phase separation. In the highly branched IPNs, forced compatibilization induces miscibility of the two components. The results are discussed in terms of suppression of cooperativity and dynamic heterogeneity in the IPNs.