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Dependence of physical properties on composition in a series of high load‐bearing polyurethane foams
Author(s) -
Mendelsohn Morris A.,
Black Richard G.,
Runk Robert H.,
Minter Herbert F.
Publication year - 1965
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.1965.070090808
Subject(s) - polyurethane , ultimate tensile strength , polyol , materials science , composite material , catalysis , cushioning , autoxidation , rosin , chemical engineering , chemistry , organic chemistry , resin acid , engineering
Data are presented on the physical characteristics of a polyether‐based urethane foam developed as a highly specialized shock‐cushioning material. The effect of changes in catalyst ratio and concentration on load deflection and density are shown—also the correlation between foam density and tensile strength. In general, load bearing and density increased nonlinearly with increasing tin catalyst concentration and decreased with increasing amine catalyst. Desired load‐bearing properties were obtained by using a blend of di‐ and higher functional isocyanates and by the inclusion of ethylene glycol with a polyol of about 4000 average molecular weight. Hydroquinone was used to inhibit autoxidation and scorching during normal exotherms of foaming. Open cells were obtained by the use of trimerized fatty acids.