Method for preparing macromolecule material chain extender

Abstract

The present invention relates to a high polymer material chain extender and a preparation method thereof, the components and the contents (weight parts) of the chain extender include: 50 to 75 parts of styrene monomer, 50 to 25 parts of acrylic acid glyceryl ester monomer, 0.1 to 1.2 parts of initiator, 0.1 to 1.0 part of dispersant and 0.1 to 0.3 part of other additives; the preparation method of the chain extender comprises that the reaction monomers and the additives are chosen, the monomers and the additives are added into a reactor according to a set sequence and a copolymerization reaction is carried out under the appropriate temperature and the stirring speed; the final product can be formed by washing and drying the reaction product. Compared with the prior art, the present invention is characterized by simple process, relative higher molecular weight, easy post-treatment, safety, reliability, broader usage and so on.

Description

technical field [0001] The present invention relates to a preparation method of a novel macromolecular material chain extender, in particular to macromolecular materials containing ester groups, amide groups and hydroxyl groups, such as polyethylene terephthalate, nylon and polycarbonate, etc. . After adding the chain extender, the even branching reaction can be carried out, and the molar mass of the material can be increased to achieve the purpose of chain extension, viscosity increase and material performance improvement. Background technique [0002] Polymer materials containing ester agents, amide groups and hydroxyl groups, such as nylon (PA), polycarbonate (PC) and polyethylene terephthalate (PET), etc., are used in mixing, extrusion, In the processing of injection molding and other processes, due to the action of heat, oxygen, and water vapor media, macromolecules will be degraded, resulting in a decline in material performance, even to the point that it cannot be us...

AI Technical Summary

Problems solved by technology

[0013] From the above data, it can be concluded that the researched and commercially available chain extenders are formed by the polymerization of more than two kinds of multifunctional groups, the polymerization methods used and the materials selected are mostly different, the synthesis process is more complicated, and the application areas are relatively different. single

Except Johnson (Johnson) Polymer Co., Ltd., the materials developed in China not only have not formed products, but are limited to a certain field, which is very unfavorable for promotion; secondly, the use of this chain extender can greatly improve the resin High tensile strength and bending strength, but it is not obvious to improve the impact strength of the material, especially the low impact strength of recycled polymer materials is a very important fatal flaw