Preparation of high molecular weight poly(butylene succinate)

Abstract

The invention relates to a method for preparing high molecular weight poly(butylenes succinate), which is characterized in that: the method adopts a cerium salt-ethylene glycol antimony binary catalytic system and solves the problems that the poly (butylenes succinate) in the prior art has low molecular weight and poor hue and so on. The prepared poly(butylenes succinate) has high molecular weight, good color and luster, and good mechanical property, improves the output and the quality of polyester products, decreases the content of stibium in the polyester products, and improves the post-processing spinnability. The weight average molecular weight of the poly(butylenes succinate) prepared by the method can reach between 5.6x10<4> and 12.5x10<4>, the rupture strength is between 35 and 55MPa, and the breaking elongation rate is between 200 and 420 percent. The method can ensure that the whole synthesis period is shortened, thereby reducing cost.

Description

technical field

[0001] The invention belongs to the technical field of preparation of aliphatic polyester, in particular to a preparation method of high molecular weight polybutylene succinate. Background technique

[0002] Plastics are widely used in various fields due to their excellent properties, but waste plastics are difficult to decompose in nature, and the disposal of waste plastics has become a major social problem. In order to solve the problem of waste plastics, degradable plastics have attracted much attention. With the improvement and strictness of environmental protection regulations, it is foreseeable that the use of degradable plastics will be more actively promoted in the future. There are many types of degradable plastics, among which biodegradable plastics occupy the main share. Biodegradable plastics have the same function as ordinary plastics, but the former can be decomposed into water and carbon dioxide by microorganisms in nature after being discarde...