Compatibilized Heterophasic Polymer Blends for Melt Flow and Impact Strength

The patent introduces a compatibilizing agent as an intermediary substance that mediates between the recycled resin and the peroxide treatment. This agent contains functional groups that react with free radicals generated by peroxide decomposition, thereby controlling the free radical activity to improve melt flow rate while protecting the polymer chains from excessive degradation that would harm impact resistance

The patent changes the chemical parameters of the system by introducing a compatibilizing agent with specific functional groups (such as hydroxyl, carboxyl, or amine groups) that can react with free radicals. This parameter change allows selective modification of the polymer properties - increasing melt flow rate through controlled chain scission while maintaining impact resistance by preventing uncontrolled degradation

The compatibilizing agent serves as an intermediary that improves the interfacial adhesion between different polymer phases in the recycled composition. By containing functional groups that can interact with both the recycled polymer chains and the matrix polymer, it enhances compatibility and maintains mechanical properties even at high recycled content levels

The patent creates a composite material system where the compatibilizing agent forms a third phase or interfacial layer between the recycled polymer and the matrix polymer. This composite structure allows the combination of high recycled content with maintained mechanical properties by providing a bridging phase that transfers stress effectively between different polymer domains