A kind of thermoplastic flame-retardant bio-based PA56 and PA66 composite material and preparation method thereof

Abstract

The invention relates to a thermoplastic flame-retardant bio-based PA56 and PA66 composite material and a preparation method thereof. The bio-based PA56 and PA66 composite material can be directly used for injection molding, and the following raw materials are mixed and extruded by twin-screws Prepared after machine mixing: 10-70% of bio-based PA56, 10-70% of PA66, 5-20% of flame retardant; the raw materials can further include 2-15% of compatibilizer, other The processing aid is 0.1-5%. The composite material of the invention has excellent comprehensive mechanical properties, flame retardancy and processing properties. At the same time, one of the selected raw materials, such as PA56, has a bio-based source, which has obvious advantages in low-carbon and environmental protection, and can improve product competitiveness.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and relates to a thermoplastic flame-retardant PA56 and PA66 composite material and a preparation method thereof, in particular to a thermoplastic flame-retardant bio-based PA56 and PA66 composite material and a preparation method thereof. Among them, PA56 has a bio-based source. The thermoplastic flame-retardant bio-based PA56 and PA66 composite materials of the present invention have good flame-retardant effect, excellent mechanical properties and processability, and have environmental protection advantages, and can be used for injection molding electronic and electrical equipment that requires biological sources for various raw materials and home appliances. Background technique [0002] Polyamide, commonly known as nylon, is a kind of polymer material with good mechanical properties, electrical properties, heat resistance, toughness, oil resistance, wear resistance, chemical res...

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Problems solved by technology

At the same time, nylon is a self-extinguishing polymer material, that is, it has certain flame retardancy, but its flame retardancy is relatively poor. Its vertical combustion can only reach UL94V-2 level, and it will drip during the combustion process. As a result, there is a potential danger of fire during use, especially in the field of electronic products. Therefore, the flame retardant modification of nylon has become a common concern in the academic and industrial circles today.

[0003] There are three main methods of flame retardant modification of nylon: (1) adding flame retardants during the modification process, that is, adding flame retardants to the nylon matrix through physical and mechanical mixing methods to obtain flame retardancy, Its advantage is that it is easy to use and has a wide range of applications, but it has a great impact on the performance of nylon; (2) Grafting or bonding flame retardant groups on the polymer chain or on the surface of the product, that is, the flame retardant is used as a Reactive monomers participate in the reaction and combine with the main chain or side chain of polyamide, so that polyamide itself contains flame retardant components, which are characterized by good stability, low toxicity, little impact on the performance of materials, and long-lasting flame retardancy , is an ideal solution, but the operation and processing technology are complicated, and it is not as common as additive flame retardants in practical applications; (3) Copolymerize with flame retardant monomers to prepare intrinsic flame retardant nylon

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