The present invention discloses polymers prepared from polar vinyl monomers and non-polar olefin monomers with the polymers having high olefin content and high weight average molecular weights as well as methods of preparing them. The inventive polymers possess interesting properties that make them particularly attractive in several industrial applications.

An efficient method for the preparation of backbone-substituted imidazolinium salts for use as N-heterocyclic carbene ligands, e.g., for organometallic catalysts is provided. These functionalized N-heterocyclic carbene ligands are used to prepare solid-supported catalysts, e.g., for olefin metathesis.

Procatalyst comprising an inorganic support, a chlorine compound carried on said support, a magnesium compound carried on said support, a titanium compound carried on said support, and a compound comprising two oxygen containing rings, wherein said two rings are linked via a bridge selected from the group consisting of carbon bridge, silicon bridge, ethane-1.2-diyl bridge, ethene-1,2-diyl bridge, alkylaminomethyl bridge and imine bridge.

A series of ligands with site specific electron donating substituents that form a catalyst complex with a transition metal and are suitable for catalysis of atom transfer radical reactions, including ATRP are described. Faster catalysis rates were observed allowing for low catalyst concentrations and linear increases in molecular weight with monomer conversion, and narrow molecular weight distributions. Cyclic voltammetry revealed that increasing the strength and number of conjugated electron donating groups resulted in more stable complexes and larger ATRP equilibrium constants.

Liquid polybutadiene, and a preparation method therefor and an application thereof are provided. The liquid polybutadiene has a number-average molecular weight of 2,500-5,500 and a molecular weight distribution index of 1-1.2. Based on the total amount of the liquid polybutadiene, the content of a 1,2-structural unit in the liquid polybutadiene is 85-95 wt %, the content of a 1,4-structural unit in the liquid polybutadiene is 5-15 wt %, and the molar ratio of a cis-1,4-structural unit to a trans-1,4-structural unit in the liquid polybutadiene is 1-2:1; and the dynamic viscosity of the liquid polybutadiene at 45 C. is 100-500 P. The liquid polybutadiene has good flowability, good film formability, and good coating performance, and a formed coating has an improved adhesion force to a substrate.

Liquid polybutadiene, and a preparation method therefor and an application thereof are provided. The liquid polybutadiene has a number-average molecular weight of 2,500-5,500 and a molecular weight distribution index of 1-1.2. Based on the total amount of the liquid polybutadiene, the content of a 1,2-structural unit in the liquid polybutadiene is 85-95 wt %, the content of a 1,4-structural unit in the liquid polybutadiene is 5-15 wt %, and the molar ratio of a cis-1,4-structural unit to a trans-1,4-structural unit in the liquid polybutadiene is 1-2:1; and the dynamic viscosity of the liquid polybutadiene at 45 C. is 100-500 P. The liquid polybutadiene has good flowability, good film formability, and good coating performance, and a formed coating has an improved adhesion force to a substrate.