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Sound attenuation of interpenetrating polymer network foams
Author(s) -
Klempner D.,
Wang C. L.,
Ashtiani M.,
Frisch K. C.
Publication year - 1986
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1986.070320332
Subject(s) - materials science , polymer , attenuation , acoustic attenuation , composite material , interpenetrating polymer network , acoustic impedance , electrical impedance , physics , electrical engineering , optics , engineering
Interpenetrating polymer networks (IPNs) composed of polyurethanes and epoxies were prepared by the simultaneous technique. Modifications of the polymer structures resulted in a series of IPNs exhibiting semimiscible behavior, as evidenced by broad glass transitions in the dynamic mechanical spectra. Since this indicates materials with potentially good sound attenuation properties as a function of temperature and frequency, foams were prepared from these IPN systems. Enhanced sound absorption occurred in these foams when measured using the impedance tube method.