Preparation method of a biodegradable super-tough flame-retardant polylactic acid-based composite material

Abstract

The invention discloses a preparation method of biodegradable super-tough flame-retardant polylactic acid composite material. The preparation method of the polylactic acid composite material includesthe steps: adding dried polylactic acid and polybutylene succinate into an internal mixer; premixing mixture for 5-10 minutes at the rotating speed of 20-100rpm at the temperature of 150-200 DEG C; adding triphenyl phosphate and tetrabutyl titanate, and continuing to melt and mix mixture for 5-30 minutes; performing compression molding to obtain the polylactic acid composite material. Total feeding weight percent of the polylactic acid and the polybutylene succinate is 100%, the polylactic acid accounts for 55.0-95.0% of the total feeding weight, the polybutylene succinate accounts for 5.0-45.0% of the total feeding weight, and the triphenyl phosphate and the tetrabutyl titanate account for 0.1-30.0% and 0.1-10.0% of the total feeding weight of the polylactic acid and the polybutylene succinate. According to the method, toughness of the material is remarkably improved, a flame-retardant element phosphorus is connected on a polymer molecular chain in a chemical bond manner, forming of acarbon layer is facilitated by titanium acid radical, and good flame resistance of the composite material is achieved.

Description

technical field [0001] The invention relates to a polymer blend material, in particular to a preparation method of a biodegradable super-tough flame-retardant polylactic acid-based composite material. Background technique [0002] With the continuous improvement of people's awareness of environmental protection and the gradual depletion of natural resources, biodegradable materials have gradually become the trend of future material development. Since the first commercial production of polylactic acid (PLLA) in NatureWorks in 2002, it has attracted widespread attention among many bio-based materials due to its excellent biocompatibility, reproducibility and high modulus. Polylactic acid is known as the "green plastic" with the most development potential, and has huge application prospects in biomedicine, food packaging, automobile industry and electrical facilities. The raw materials of polylactic acid come from renewable plant resources (sugar cane, corn, sweet potato, etc....

AI Technical Summary

Problems solved by technology

Although PBS has good comprehensive properties, its price in the market is relatively high compared with ordinary plastics, making it difficult to popularize and use

If only PLLA and PBS are simply physically melt blended, the difference in polarity of the two polymers will lead to obvious phase separation in the product, which will seriously affect the toughening effect

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