Flame-retardant polyester composite material and preparation method thereof

Abstract

The invention belongs the technical field of materials, and concretely relates to a flame-retardant polyester composite material and a preparation method thereof. The preparation method comprises the steps: putting thermoplastic elastomer and processing oil in a high-speed mixed for high-speed mixing according to a ratio until the processing oil and the thermoplastic elastomer are mixed uniformly, taking out for usage; uniformly stirring the obtained mixture, polylactic acid resin, polycarbonate resin, a phosphorus-serial compound flame retardant, a nucleation promoter and an anti-droop agent in a dry mixing way according to a ratio, then introducing the mixture into a double screw extruder via a volumetric feeder for fusion mixing processing, after fusion mixing processing is finished, cooling obtained extruded strips with cold water to become solid state, and preparing cylindrical particles by using a comminutor; and drying the above resin composition particles in a hot-wind circulating baking box, and then using an ejecting molding machine to prepare a test sample strip. The flame-retardant polyester composite material obtained by using the preparation method is a PLA / PC composition giving consideration to toughness, strength, flame resistance and high durable temperature.

Description

【Technical Field】 [0001] The invention belongs to the technical field of materials, and specifically relates to a flame-retardant polyester composite material and a preparation method thereof. 【Background technique】 [0002] PC (polycarbonate) is a macromolecular polymer containing carbonate groups in the molecular chain. It is an amorphous transparent engineering plastic with the advantages of high strength and modulus, high toughness, and low shrinkage. PC is usually blended with ABS to form a PC / ABS alloy to form engineering plastics with excellent comprehensive properties, which are widely used. However, PC / ABS alloys are not degradable. Today, with global resource shortages, rising oil prices and increasing environmental pressures, people are paying more and more attention to the application of non-petrochemical materials. Therefore, the application of bio-composite materials in the plastics industry has attracted more and more attention. [0003] Among all the commercially ...

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, the glass transition temperature of PLA is 60°C, and the durable temperature of the finished product is only about 55°C; on the other hand, the flame retardancy level of PLA itself is only V-2, and it will melt when burning. Phenomenon, in some special fields, such as electronic appliances, automotive interiors, etc., conventional polylactic acid cannot meet the requirements of use, and it is necessary to add flame retardants to it for flame retardant modification

However, the flame retardants available in the existing market usually have a plasticizing effect on plastics, resulting in a lower durable temperature of the product

In the current flame retardant research of PLA, it can usually be found that the addition of flame retardants can make the flame retardant grade of the material reach V-0, but it reduces the durable temperature of the product.

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