In the present investigation

the effect of the chain structure and aggregation state of bisphenol A polycarbonate (PC) on the crystallization kinetics and morphology of the poly(butylene carbonate) has been studied by DSC and POM.It was found that the addition of bisphenol A polycarbonate A promoted the nucleation of the poly(butylene carbonate)

while the chain structure of PC had the opposite influence on the crystal growth rate of the poly(butylene carbonate).The linear bisphenol A polycarbonate polycarbonate accelerates the crystal growth rate of poly(butylene carbonate)

while the long chain-branched bisphenol A polycarbonate decelerates it.The phase images of the blends of aliphatic polycarbonates and bisphenol A polycarbonate were obtained under the tapping mode by atomic force microscopy (AFM).The linear bisphenol A polycarbonate shows isolated irregular aggregation with phase size of ca.200 nm in the poly(butylene carbonate)

while the formation of condense and continuous network structure by long branched bisphenol A polycarbonate might explain the deceleration effect on the crystal growth rate of the poly(butylene carbonate).