初生态低缠结超高分子量聚乙烯催化剂研究进展

Progress in catalyst for nascent disentangled ultra-high molecular weight polyethylene

超高分子量聚乙烯(UHMWPE)具有高耐磨性、高强度和刚度、轻质、耐腐蚀、低摩擦系数、生物相容性等特点,作为一种优异的工程塑料广泛应用于高端新材料等各领域,而调控高分子链的缠结程度对于更好地应用UHMWPE至关重要。从均相催化和非均相催化两方面综述了制备初生态低缠结UHMWPE的催化剂技术的研究进展,其中,单中心催化体系和修饰型Ziegler-Natta催化剂在制备初生态低缠结UHMWPE的工业应用中前景广阔。

Ultra-high molecular weight polyethylene(UHMWPE)stands out for its remarkable properties,including exceptional wear resistance,high tensile strength and rigidity,lightweight,corrosion resistance,low friction coefficient,and biocompatibility.This exceptional engineering plastic finds wide-ranging applications in high-end materials across various industries.The precise control of polymer chain entanglement holds crucial significance for the optimal utilization of UHMWPE.Latest advancements in catalyst technologies for the preparation of nascent disentangled UHMWPE are reviewed from the aspects of homogeneous and heterogeneous catalysis.Notably,single-site catalytic systems and modified Ziegler-Natta catalysts show significant industrial promise in the production of nascent disentangled UHMWPE.