Crosslinking and mechanical property of liquid rubber. I. Curative effect of aliphatic diols

摘要: The structure–property relationships of polyurethane elastomer derived from liquid hydroxylterminated polybutadiene/low molecular weight aliphatic diol/diisocyanate system were studied. effects the amount low diol on mechanical properties discussed basis results stress–strain curve, swelling, dynamic viscoelasticity, x-ray diffraction, and others. It was found that some particular combinations diisocyanate specifically affect elastomers. When elastomers plotted against number methylene carbons in diol, characteristic zigzag patterns obtained. These explained by difference packing dependence ability intermolecular hydrogen bonding whether even or odd. This assumption confirmed diffraction.