Premium
Analysis of unsaturated polyester‐polyurethane interpenetrating polymer networks II: Phase separation behavior
Author(s) -
Lee Sun Suk,
Kim Sung Chul
Publication year - 1993
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760331004
Subject(s) - polyurethane , materials science , polyester , unsaturated polyester , interpenetrating polymer network , composite material , phase (matter) , polymer science , polymer , organic chemistry , chemistry
Abstract The phase separation behavior of unsaturated polyester (UPE)‐polyurethane (PU) interpenetrating polymer networks (IPNs) was investigated by light scattering measurements during simultaneous polymerization. The scattered light intensity change with time showed the formation of the dispersed domains, and the average domain correlation length could be calculated from the angle of maximum scattering intensify. It was noted that the dominant phase separation process was spinodal decomposition due to fast reaction. The morphology observed by the transmission electron micrographs for various process conditions showed similar results as obtained from the light scattering experiment.