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Effect of blending technique on the properties of polyurethane and epichlorohydrin blends (sulfur cure)

✍ Scribed by B. B. Khatua; M. Maity; C. K. Das

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
241 KB
Volume
76
Category
Article
ISSN
0021-8995

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✦ Synopsis

Two elastomers having reactive functional groups may react with each other. Considering this, the blends of PU and EPH elastomers have been prepared where better performance properties can be tailored and optimized through the interchain crosslinking reaction. It is evident from the IR spectral analysis of the thin film of PU/EPH blend without curatives that an interchain crosslinking reaction occurs between the two elastomeric phases. Preheating of the preblends before addition of curatives enhances the properties of the blends. Thermal study revealed the delayed degradation with retardation in weight loss for the preheated, preblended samples. Preheating also restricted the extractability of the phases, by solvent, due to interchain crosslinking.

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