Toughened halogen-free flame-retardant polylactic acid blending material

Abstract

The invention discloses a toughened halogen-free flame-retardant polylactic acid blending material which is prepared by melting and blending the following components in percentage by weight: 40-93 percent of polylactic acid, 1-40 percent of toughener, 5-30 percent of flame retardant, 0-30 percent of auxiliary flame retardant and 0.5-1 percent of antioxidant. Because the toughener is also introduced into the polylactic acid blending material on the basis of adding a halogen-free flame retardant, the material has excellent flame retardant performance and also markedly improves the toughness of the polylactic acid simultaneously, thereby not only enlarging the use range of the material, but also solving the two great problems of easy combustion and poor toughness of the polylactic acid simultaneously.

Description

technical field [0001] The invention belongs to the technical field of polylactic acid blended modified materials, and in particular relates to a toughened halogen-free flame-retardant polylactic acid blended material. Background technique [0002] Since polylactic acid (PLA) is a "green polymer" material that is derived from renewable resources and can be completely degraded into carbon dioxide and water, it can not only get rid of the dependence on petroleum resources, but also use the waste that the manufacturing process brings to the environment. The load is small, and polylactic acid also has good mechanical strength and processing performance. It has been successfully used in textiles, mechanical parts, medicine and other fields, and has become the most promising one among all degradable materials. It has the potential to replace traditional plastics. product potential. For example, Far East Textile Co., Ltd. has produced polylactic acid fiber products such as shirts,...

AI Technical Summary

Problems solved by technology

However, aluminum hydroxide, magnesium hydroxide and other inorganic filler-type flame retardants are used to modify the flame retardancy of materials, and the addition amount often needs to reach 50-60wt% to achieve a certain flame retardancy effect. A large amount of addition is compatible with the material It is poor, so it will cause great damage to the comprehensive properties of polylactic acid, especially the toughness in mechanical properties

Ammonium phosphate and diammonium hydrogen phosphate, melamine phosphate, polysiloxane, silica gel, low-melting glass fiber, triphenylphosphine, mica, and some intumescent flame retardants (mainly ammonium polyphosphate and other flame retardant additives) Compound composition) etc. when flame retardant modification is carried out to PLA, although all can obtain better flame retardant effect to a certain extent, yet, the inventor finds in carrying out systematic research to above-mentioned system, because these flame retardants Or the compatibility is poor or the amount of addition is large, which will lead to the decline of the comprehensive performance of PLA, making the already brittle material more brittle, greatly affecting its use effect

Images