A high heat-resistant, high-strength semi-aromatic polyamide/polyester alloy material and its preparation method and application

Abstract

The invention relates to a high-heat-resistant and high-strength semi-aromatic polyamide / polyester alloy material. The alloy material comprises the following components in percentages by weight: 20-70% of semi-aromatic polyamide, 10-50% of a polyester, 0.1-4% of a mixture composed of an aminobenzenesulfonic acid compound and an alcohol amine compound, 10-50% of a reinforcing agent, and 0.1-30% ofan auxiliary agent. The invention also provides a preparation method and application of the above alloy material. The high-heat-resistant and high-strength semi-aromatic polyamide / polyester alloy material provided by the invention has the advantages of high strength, good toughness, good dimensional stability and the like, and particularly has excellent heat resistance; the long-term heat-resistant temperature is higher than 150 DEG C, and when the alloy material is maintained under high-temperature condition of 150 DEG C for 1000 h, the tensile strength retention rate of the material is greater than 90%; the material is suitable for coil bobbins, connectors and engine peripheral components; and the material has a simple formula and preparation process, and low costs.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high heat-resistant, high-strength semi-aromatic polyamide / polyester alloy material and its preparation method and application. Background technique [0002] Semi-aromatic polyamides, such as PA-6I, PA-6T, PA-9T, PA-10T, PA-12T, MXD6 have good mechanical properties, excellent heat resistance, low water absorption and good size Stability, it has outstanding advantages in high temperature and high humidity environment. However, due to its close melting temperature and decomposition temperature, the narrow processing temperature range of the material, and the high production cost, its application is limited. [0003] Polyester, especially engineering plastic grade PET and PBT, has good long-term heat resistance and mechanical properties, low cost, high cost performance, and has a wide range of applications in the field of electronic appliances. Blending poly...

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Problems solved by technology

[0004] Aiming at the above problems that the existing compatibilizers lead to the reduction of the tensile strength and heat resistance of the polyamide / polyester alloy material, the present invention provides a high heat-resistant, high-strength semi-aromatic polyamide / polyester alloy material , does not contain compatibilizer, has excellent mechanical properties and thermal properties, long-term heat resistance temperature is higher than 150 ° C, the material is kept at 150 ° C for 1000 hours, and the tensile strength retention rate is greater than 90%

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