It was found that the weight ratio of PU/PS and equiva- lent ratio of NCO/OH was 60/40 and 2. 8/1. respectively, the property of the IPN system was super.

• 结果表明：当NCO/OH当量比为2.；8、PU/PS质量比为60/40时，该共轭三组分IPN体系力学性能最佳。