Health & Environmental Research Online (HERO)


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8713390 
Journal Article 
Determination of crosslink density by swelling in the castable polyurethane elastomer based on 1/4 - cyclohexane diisocyanate and para-phenylene diisocyanate 
Barikani, M; Hepburn, C 
1992 
1 
1 
1-5 
English 
Five different series of castable polyurethane elastomers based on the system polycaprolactone/trans 1,4-cyclohexane diisocyanate or paraphenylene diisocyanate and various types of chain extenders were synthesized to study the effect of using excess diisocyanate and three functional chain extender on crosslink density and swollen volume. Crosslink density was measured by swelling in toluene at room temperature for one week. It was found that the crosslink density significantly increases with increasing amounts of excess diisocyanate in the original gel. It was also found that a higher value of crosslink density is observed on changing from diol chain extenders to a diamine system.