Large molecular nucleating agent for poly butylenes succinate and copolyester of poly butylenes succinate and application thereof

Abstract

The invention relates to a large molecular nucleating agent for poly butylenes succinate and a copolyester of the poly butylenes succinate and an application thereof. The large molecular nucleating agent is polyvinyl acetal, and the nucleating performance of the polyvinyl acetal is regulated and controlled by blending the polyvinyl acetal with the poly butylenes succinate and the copolyester of the poly butylenes succinate in an in-site polymerization way or in an adding way in a processing process. The large molecular nucleating agent is non-toxic, odorless, non-corrosive and dispersible. By taking the polyvinyl acetal as the large molecular nucleating agent, the peak crystallization temperatures of the poly butylenes succinate and the copolyester of the poly butylenes succinate can be raised remarkably, crystallization degree and crystallization speed are increased remarkably, a crystallization period is shortened remarkably, and the mechanical property of resin is enhanced remarkably.

Description

technical field

[0001] The present invention relates to a kind of macromolecule nucleating agent and application method for polybutylene succinate and copolyester thereof, specifically, to a kind of polybutylene succinate and polyester material The polyvinyl acetal macromolecular nucleating agent of its copolyester and its application method. Background technique

[0002] The level of crystallinity of polymer materials, the difference of crystal morphology and crystal structure will affect the performance of polymer materials, thus affecting its application. The properties of commonly used polyester materials are significantly affected by crystallization. Polybutylene succinate (PBS) and its copolyester, due to their biodegradability, have become a research hotspot in the ascendant in recent years. However, due to problems in the synthesis process, the molecular weight of the obtained polyester is generally low, and its processing temperature is generally low, and it is ea...