Benzothiazole ring substituted aminophenoxy zinc complex, and preparation method and application thereof

Abstract

The invention discloses a benzothiazole ring substituted aminophenoxy zinc complex, a preparation method thereof, and an application of the benzothiazole ring substituted aminophenoxy zinc complex inhigh-activity and high-selectivity catalysis of lactone ring opening polymerization. The preparation method comprises the following steps: directly reacting a neutral ligand with a metal raw materialcompound in an organic medium, filtering, concentrating, and recrystallizing to obtain the target compound. The benzothiazole ring substituted aminophenoxy zinc complex disclosed by the invention is an efficient lactone ring opening polymerization catalyst and can be used for catalyzing a polymerization reaction of lactide and other lactones; and especially for racemic lactide, polylactide with high isotacticity can be obtained. The benzothiazole ring substituted aminophenoxy zinc complex has the very obvious following advantages: the raw materials are easy to obtain, the synthesis route is simple, the product yield is high, the catalytic activity and stereoselectivity are very high, a high-regularity and high-molecular-weight polyester material can be obtained, and the requirements of industrial departments can be met. The structural formula is shown in the specification.

Description

technical field

[0001] The present invention relates to a class of benzothiazole ring substituted aminophenoxy zinc complexes and the application of such complexes in lactone polymerization. Background technique

[0002] Petroleum-based materials cause serious environmental pollution due to their difficulty in biodegradation, and limited petroleum resources do not conform to the strategy of sustainable development. Aliphatic polyester materials have the advantages of degradability and biocompatibility. Among them, polylactic acid, as a new type of green material, not only has the above advantages, but also its raw materials are renewable and realize its carbon cycle in nature, which is recognized Environmentally friendly green polymer materials have been widely used in medicine, medical treatment and food packaging and other fields. With the advancement of science and technology, new requirements and uses have been put forward for the performance of polylactic acid material...

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