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Structural parameters of the network formed first in in‐situ sequential interpenetrating polymer networks
Author(s) -
Tabka M. T.,
Widmaier J. M.,
Meyer G. C.
Publication year - 1989
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19890300105
Subject(s) - polyurethane , swelling , polymer , materials science , solvent , interpenetrating polymer network , methyl methacrylate , polymer chemistry , in situ , polymer network , chemical engineering , composite material , chemistry , organic chemistry , polymerization , engineering
As part of a study concerning poly(propylene glycol)‐based polyurethane / poly(methyl methacrylate) interpenetrating polymer networks, polyurethane networks were synthesized at various dilutions of the reaction medium and at different values of the [NCO]/[OH] ratio. The network defects arising in such materials were evaluated by three independent experimental approaches: solvent extraction, swelling behaviour, and compression measurements. It was found that the networks with the least defects are formed at high precursor concentration, with a [NCO] over [OH] excess of about 7%.