Premium
Polyurethane—polystyrene interpenetrating polymer networks
Author(s) -
Kim S. C.,
Klempner D.,
Frisch K. C.,
Frisch H. L.,
Ghiradella H.
Publication year - 1975
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.760150503
Subject(s) - materials science , polyurethane , polystyrene , interpenetrating polymer network , composite material , ultimate tensile strength , polymer , phase inversion , glass transition , polyester , modulus , phase (matter) , trimethylolpropane , chemistry , organic chemistry , membrane , biology , genetics
Two component interpenetrating polymer networks (IPN) of the SIN type (simultaneous interpenetrating networks), composed of a polystyrene network (crosslinked with divinyl benzene) and a polyester‐polyurethane network (crosslinked with trimethylolpropane), were made. Electron microscopy and glass‐transition measurements showed that phase separation had resulted with some interpenetration, presumably occurring at the boundaries. At a composition of about 75 percent polyurethane, a phase inversion occurred, the continuous phase being polystyrene at polyurethane compositions of less than 75 percent. The stress‐strain properties and hardness measurements agreed with these results. Enhanced tensile strength was observed in the IPN's in a concentration range where modulus reinforcement was not evident. A small enhancement in tear strength and thermal stability was also noted.