Blends of 1,4-polybutadiene (7 % 1,2) and 1,2-polybutadiene (63 % 1,2) were studied in the entanglement regime. DSC studies confirm that the blends are miscible. The blends appear to be thermorheologically complex. This is a consequence of different temperature dependences of the relaxation times of the components of the blends. Analysis of these temperature dependences suggests that each component experiences its own T g slightly different frcom the average DSC T g . These different T g 's suggest that each polymer is preferentially surrounded by its own chains.