Fluorine-containing syndiotactic polystyrene and preparation method thereof

Abstract

The invention relates to fluorine-containing syndiotactic polystyrene and a preparation method thereof, belongs to the technical field of preparation of polymers and solves the technical problems of extremely low polymerization rate and transformation rate of current fluorine-containing polystyrene in coordination polymerization. The fluorine-containing syndiotactic polystyrene comprises a repetition unit with a structure expressed as formula (I) and a repetition unit with a structure expressed as formula (II). The formula (I) and the formula (II) are shown in the description. Experimental results show that the syndiotactic selectivity of the fluorine-containing syndiotactic polystyrene is not less than 90%; the content of structure units of the fluorine-containing styrene can be randomly adjusted between 0 and 100%. The preparation method of the fluorine-containing syndiotactic polystyrene firstly achieves high-activity, high-transformation-rate and high-selectivity coordination polymerization of the fluorine-containing styrene for the first time, achieves copolymerization of the fluorine-containing styrene and styrene under any monomer ratio for the first time, enables the insertion rate of the fluorine-containing styrene to be freely regulated and controlled, and breaks through the limitation that the conventional fluorine-containing styrene is low in possibility of coordination polymerization; through the method, the complete transformation of the monomers can be achieved.

Description

technical field

[0001] The invention relates to the technical field of polymer preparation, in particular to a fluorine-containing syndiotactic polystyrene and a preparation method thereof. Background technique

[0002] Syndiotactic polystyrene is a semi-crystalline polymer with high crystallinity, high elastic modulus, low dielectric constant, low loss factor, and excellent heat resistance and solvent resistance. It has a very wide range of applications in industry prospect. However, due to the lack of polar groups in syndiotactic polystyrene, its dyeability, adhesion, and wettability are poor, and it is easy to generate static electricity. In addition, the high melting point and low weather resistance also severely limit the processing and application of syndiotactic polystyrene as a material. Therefore, the modification of syndiotactic polystyrene on the basis of keeping the original properties of syndiotactic polystyrene as much as possible has always been a subject th...

Images