High-performance long glass fiber-reinforced TPU (thermoplastic polyurethane) composite material and preparation method thereof

Abstract

The invention discloses a high-performance long glass fiber-reinforced TPU (thermoplastic polyurethane) composite material. The composite material comprises the following components in parts by mass: 35-75 parts of thermoplastic polyurethane elastomer, 20-60 parts of long glass fiber, 3-8 parts of compatilizer, 0.4-1.5 parts of flow modifier, 0.2-0.5 part of chain extender, 0.4-0.6 part of heat stabilizer and 0.4-0.6 part of ultraviolet absorber. According to the composite material, TPU with high surface hardness is taken as the base material, the flow modifier is used for improving the fluidity of the matrix, the chain extender is added for improving the molecular weight of TPU so as to prepare the high-performance long glass fiber-reinforced TPU composite material, the strength and rigidity of the TPU material are improved, the toughness of the TPU material is improved, and the cost of the material is lowered. The preparation method is simple, is simple and convenient to operate, has high benefit, and is applicable to industrial production.

Description

technical field [0001] The invention relates to the field of material science, in particular to a polymer material and a preparation method thereof. Background technique [0002] TPU Chinese name: thermoplastic polyurethane elastomer. The so-called elastomer refers to a polymer material with a glass transition temperature lower than room temperature, an elongation at break > 50%, and better recovery after external force is removed. Polyurethane elastomer is a relatively special category of elastomers. Polyurethane elastomer has a wide range of hardness and performance. Therefore, polyurethane elastomer is a type of polymer material between rubber and plastic. The material has good mechanical strength, oil resistance, ozone resistance, excellent low temperature performance, etc., but its disadvantages are poor aging resistance, large heat storage, low friction coefficient of wet surface, easy to slip, and relatively high cost. Inorganic particles and fibers are usually u...

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Problems solved by technology

The material has good mechanical strength, oil resistance, ozone resistance, excellent low temperature performance, etc. Its disadvantages are poor aging resistance, large heat storage, low friction coefficient of wet surface, easy to slip, and relatively high cost

Inorganic particles and fibers are usually used to reinforce thermoplastic polyurethane elastomers, but the above-mentioned materials will reduce the toughness of the material while increasing the strength and reducing the cost. At present, the use of long fiber reinforcement technology can not only reduce the cost of materials, but also greatly Improve the mechanical properties of the material and the "floating fiber" phenomenon; however, ordinary TPU has high viscosity, low melt index, poor fluidity and low hardness, which limits the preparation of long glass fiber reinforced TPU

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