Abstract
Phase behavior of poly(styrene- b-isoprene- b-styrene) (SIS)/tackifier resin blends were investigated by thermal analysis, morphological observation and cloud point measurements. In the heating process, the blends showed lower critical solution temperature phase transition at around 150°C and upper critical solution temperature (UCST) phase transition at around 200°C. However, in the cooling process, only UCST phase transition was observed in the SIS/tackifier resin blends. In addition, it was found that properties of the pressure sensitive adhesive in SIS/tackifier resin blends were changed with annealing temperature corresponding to the phase behavior.
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