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Preparation method of toughness enhanced and reinforced polybutanediol terephthalate nanometer composition

A polybutylene terephthalate and nanocomposite material technology is applied in the field of toughening and reinforcing PBT nanocomposite materials, and the preparation field of toughening and reinforcing polybutylene terephthalate nanocomposite materials, which can solve the impact of impact Poor toughness, unfavorable injection molding of large or fine products, decreased flow properties, etc., to achieve the effect of improving toughness and strength, broad application and industrialization prospects, surface finish and heat resistance.

Inactive Publication Date: 2004-10-20
SHANGHAI JIAO TONG UNIV +1
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AI Technical Summary

Problems solved by technology

However, thermoplastic polyester modified solely with glass fiber has poor impact toughness and poor surface finish. Injection molding into products often causes glass fiber exposure, which affects product performance and appearance. In order to improve the surface finish of PBT / glass fiber composite materials, Ji Jiliang and others have developed a high gloss, rapid prototyping reinforced polybutylene terephthalate (CN00124686.0)
In order to improve the toughness of PBT, people have also done a lot of work (such as patent CN00816306.5; US4,753,890; EP737,715; EP531,008, etc.) PBT has been modified to produce a material with good impact toughness, but it may lead to a decrease in flow performance, which is not good for injection molding large or fine products, and the tensile strength, bending strength and heat resistance are also poor. not ideal

Method used

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Embodiment Construction

[0012] The following examples are to further illustrate the present invention, but not to limit the scope of the present invention.

[0013] The formula of embodiment is shown in Table 1, and in 100 parts of polybutylene terephthalates, the inorganic nano-material of formula amount listed in Table 1, reaction compatibilizer, antioxidant and lubricant, mix on high-speed mixer earlier Evenly, the speed of the high-speed mixer is 3000 rpm, and then extruded together with the long glass fibers listed in Table 1 in an ordinary twin-screw extruder to make pellets, the screw temperature is 210 ° C in the feeding section, compression section 230°C, homogenization section 250°C and die temperature 240°C, the speed is 320 rpm, the residence time of the material in the screw is 2 minutes, the extruded material is cooled by a water-cooled cooling tank, and then passed through a pelletizer Cut into pellets to obtain pellets, and dry in an oven at 120° C. for 24 hours to obtain a toughened ...

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Abstract

A nano-class toughened and strengthened butanediol polyterephthalate composition is prepared through proportionally mixing butanediol polyterephthalate, inorganic nanoparticles, reaction compatibilizer, antioxidizing agent, and lubricant, high-speed stirring, loading it along with glass fibres in dual-screw extruder, reactive mixing and granulating. Its advantage is high high-temp resistance, strength, toughness and surface polished.

Description

Technical field: [0001] The invention relates to a preparation method of a toughened and reinforced polybutylene terephthalate (PBT) nanocomposite material, in particular to a method for preparing polybutylene terephthalate, inorganic nanocomposites with a twin-screw extruder Materials, reaction compatibilizers, antioxidants, lubricants and glass fibers are reactively blended to obtain a new method for toughening and strengthening PBT nanocomposites with high performance. The invention belongs to the technical field of polymer processing. Background technique: [0002] As we all know, polybutylene terephthalate is a thermoplastic engineering plastic, which has excellent dimensional stability, heat resistance, chemical corrosion resistance and excellent mechanical properties, etc., and is widely used in electronics, electrical and automotive and other fields. Due to the shortcomings of polybutylene terephthalate such as poor water resistance, poor high-temperature performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K7/14C08L67/03
Inventor 戚嵘嵘聂景辉茅大联陈建新周持兴
Owner SHANGHAI JIAO TONG UNIV
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