화학공학소재연구정보센터
Journal of Applied Polymer Science, Vol.93, No.2, 845-853, 2004
Interchain crosslinkable polymer blends of polyurethane and polyacrylic elastomer (Sulfur cure)
Blends of polyurethane and polyacrylic elastomers prepared by three different blending techniques have been studied in different blend ratios. The processability of the polyurethane elastomer was improved as a result of blending with the polyacrylic elastomer. The blending technique has a significant role in determining the physical properties of the blends. Improvement of physical properties was observed in the blends containing the interchain crosslink bonds. IR spectral analysis suggested the formation of interchain crosslink between the two elastomers phases on heat treatment, before the addition of any curatives. Thermal stability of the blends was also improved when preblending and preheating techniques were applied. The extraction of the single phase by solvent was also restricted to a significant extent for the preheated sample probably due to the interchain crosslinking. (C) 2004 Wiley Periodicals, Inc. J. Appl Polym Sci 93: 845-853, 2004.