STUDY ON THE COMPATIBILITY OF BR CR/SBS BLENDS BY USING SMALL AMOUNTSOF SBS/

The structures and properties of BR/CR/SBS blends were studied by usin g optical, electron microscopy, FTIR methods, etc. Results showed that the addition of a small amount of SBS to the thermodynamically immisc ible blends BR/CR could significantly promote fine and homogeneous dis persion of the system, increase crosslink density of vulcanizates and tensile strength, and decrease loss of tan delta of the blends. IR spe ctra also demonstrated the stronger interaction between SBS and BR, CR . The theoretical prediction of compatibilizing activity of SBS in the BR/CR blends is in excellent agreement with experimental results. (C) 1999 John Wiley & Sons, Inc.