Solid state behaviour and properties of plasticized cellulose acetobutyrate/phenoxy blends

Blends of commercial plasticized cellulose acetobutyrate (CAB) and the polyhydroxypropylether of bisphenol A (Phenoxy) were obtained in order to study the possibility of the plasticizer of the CAB to be distributed in the blend and to change the miscibility behaviour and the mechanical properties of the blends. During melt mixing the plasticizer of the CAB migrated to the phenoxy and changed the positions of the transitions of the blends. This change in the T_g values did not show any influence on the miscibility level. An antiplasticization process was evident, giving rise to higher modulus but poor ductilities in the blends.