Mentallocane plastomer modification of polypropylenes

Abstract

Abstract Plastomers are ethylene alpha‐olefin coplymers made from the single site metallocdene catalyst using a variety of polymerization processes. The key features are uniform intermolecular and intermolecular comonomer distribution, low extractables, comonomer dependent. meleting point, and low ashcontent. The uniform comonomer behavior. The dual characterplastomer evolved into a new class of impact modifiers for polypropylenes replacing the conventional ethylene‐propylene cooplymer (EPR)to produce both thermoplastic olefins (TPOs) and thermoplastic elastomers(TPEs). Ahybrid TPE based on grafting of a functional butyl rubber to plastomer was explored. Low temperature impact and clarity can be achieved by matching the reflective index of a plastomer with a random polypropylene copolymer (RCP).