A kind of lactide ring-opening polymerization catalyst composition and preparation method thereof

Abstract

The invention belongs to the technical field of polylactic acid catalysts, in particular to a lactide ring-opening polymerization catalyst composition and a preparation method thereof, which solves the problems of poor catalyst stability, cytotoxicity, and affecting the performance of polylactic acid products in the prior art. The lactide ring-opening polymerization catalyst composition includes the following raw materials: zinc oxide, yttrium oxide, triethanolamine, n-octacosanol, bistriphenylphosphine palladium dichloride, triisopropylsilyltri Fluoromethanesulfonate, compound decolorizer, activated carbon, activated alumina. The catalyst composition of the invention has good stability, high catalytic efficiency and no cytotoxicity, and the yield of polylactic acid formed by catalyzing the ring-opening polymerization of lactide is high.

Description

technical field

[0001] The invention relates to the technical field of polylactic acid catalyst, in particular to a lactide ring opening polymerization catalyst composition and a preparation method thereof. Background technology

[0002] Polylactic acid is a polymer obtained by polymerization with lactic acid as the main raw material. It is a new type of biodegradable material. It has good thermal stability, processing temperature of 170 ~ 230 ℃, and has good solvent resistance. It can be processed in many ways, such as extrusion, spinning, biaxial stretching and injection blow molding. At present, there are various synthetic methods of polylactic acid, including direct condensation, lactide ring opening polymerization and other synthetic methods. Due to the limitation of reaction conditions, such as the accumulation of water and the increase of reaction viscosity, the molecular weight of polylactic acid synthesized by direct method is low, which will further affect the related p...

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