Polymer composition and preparation method thereof

A method for preparing a polymer composition includes the steps of providing a multiphase thermoplastic polymer composition, providing a compatibilizer, providing a peroxide compound, and mixing and melting the multiphase thermoplastic polymer composition, compatibilizer, and peroxide compound. The compatibilizer comprises an ester compound formally derived from a polyol containing three or more hydroxyl groups and an aliphatic carboxylic acid containing one or more carbon-carbon double bonds. A modified polymer composition includes a multiphase thermoplastic polymer composition and a compatibilizer. The modified polymer composition has an ethylene discontinuous phase present in the form of discrete particles in a propylene continuous phase. Discrete particles of an ethylene discontinuous phase are present in the modified polymer composition at a concentration of 2.1 or more particles per cubic micron. 一种用于制备聚合物组合物的方法，包括以下步骤：提供多相热塑性聚合物组合物、提供相容剂、提供过氧化物化合物，以及混合和熔融所述多相热塑性聚合物组合物、相容剂和过氧化物化合物。所述相容剂包含形式上衍生自含有三个或更多个羟