纳米粒子与富勒烯修饰配位催化剂催化双烯烃聚合的研究

A series of polybutadiene homopolymers and copolymers with different structures are synthesized with coordination polymerization. The catalytic activity, product structure, relative molecular weight and its distribution is adjusted by the means of adding different ligands and different supports such as silica gel, MgCl2, etc. Activity and stereoselectivity is studied by using catalysts which are chemically modified by the composites of nano-particle supports, fullerene and its derivatives plus different ligands. PB-blend elastomers are prepared by the effective 'assembly' of PB chains with specific structures. Structure and physical properties of the resulted products are characterized. DMA, DSC and TG are employed to trace and analyze the dynamic viscoelasticity and thermal performance. For this novel PB-blend elastomer, the anti-wet-skid coefficient is close to SBR, and evidently better than cis-rich polybutadiene rubber; heat buildup is lower than SBR and cis-rich PB rubber, and a good balance is achived between lowering rolling loss and improving anti-wet-skid. Together with its fair banbury compounding performance, the excellent comprehensive properties make the material ideal for production of safe, energy-saving, high performance belt tyres. The productct is extended to multy-area to promote industrialization

利用具有特殊活性的纳米粒子与富勒烯及其衍生物（卤化、烷氧化及羟基化物等复合，对不同价态和配位数的双烯烃聚合用齐革勒－纳塔催化剂进行修饰，并配合使用具有不同给电子能力和几何形状的其它配体，通过电子因素和几何因素等途径，调变其催化活性和立构选择性。以设计出一系列新型催化剂，并了解它们催化双烯烃聚合的机理，优化催化剂配方，为采用配位聚合′组装′特定结构的双烯烃聚合物新材料提供科学依据和新型催化剂。