Abstract

AbstractPolyurethane elastomers based on aliphatic polycarbonate diols and/or polypropylene glycols form miscible blends with polycarbonate, thus potentially improving its resistance to microcrack initiation and growth. Up to 20 wt.‐% of synthesized polyurethane elastomers were dissolved in polycarbonate via solution casting or melt mixing. Some phase separation was detected in films cast from solutions with 10 to 20 wt.‐% of polyurethane elastomers; such blends usually turned into single‐phase systems by subsequent thermal annealing. Among the tested polyurethane elastomers, the products based on toulene diisocyanate and mixtures of polycarbonate diols with polypropylene glycols were found to be effective modifiers for polycarbonate; therefore, they were also used in the blends prepared by melt mixing and processed by injection moulding.

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