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Glass fiber reinforced polyethylene glycol terephthalate composite material and preparation thereof

A polyethylene terephthalate and glass fiber technology, which is applied in the field of glass fiber reinforced polyethylene terephthalate composite material and its preparation, can solve the problem of loss of material rigidity, insufficient notched impact strength, material Tensile strength and tensile modulus drop, etc.

Inactive Publication Date: 2008-10-08
SHANGHAI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the patent CN1136577A, nylon-based polymers are used as nucleating agents to obtain glass fiber reinforced polyethylene terephthalate composite materials, but their notched impact strength is not enough, so it is difficult to be used as engineering structural parts; Fung.K.L. etc. have reported using MA -g-SEBS triblock copolymer toughened PET (Polym.Test.2005 No.24, p863-872), its notched impact strength has been greatly improved, but on the other hand, the tensile strength and tensile strength of the material Decrease in tensile modulus, loss of material rigidity

Method used

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  • Glass fiber reinforced polyethylene glycol terephthalate composite material and preparation thereof

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Embodiment Construction

[0024] The present invention is described in detail below in conjunction with embodiment.

[0025] Embodiments 1 to 6 are prepared according to the formula in Table 1; dry polyethylene terephthalate and toughening agent, chain extender, nucleating agent, crystallization accelerator, antioxidant, lubricant at high speed After stirring evenly in the mixer, put it into the twin-screw extruder from the feeding port. The melt extrusion temperature of the extruder is set in the range of 220-290°C, the vacuum degree is 0.08Pa, and the speed of the main engine is 80-280r / min; glass fiber After surface treatment with silane coupling agent in advance, it needs to be added at the downstream feeding port; the extruded material is cooled, air-dried, pelletized, and after drying, the glass fiber reinforced polyethylene terephthalate composite material is obtained.

[0026] The formula of embodiment is as follows:

[0027] Table 1 embodiment formula

[0028]

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PUM

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Abstract

The invention relates to a PET glass fiber reinforced composite material, which has the following components based on weight proportion: 100 portions of PET, 10-45 portions of alkali-free glass fibers, 5.0-25 portions of toughener, 0.1-10 portions of crystallization promoter, 0.1-1.0 portion of chain extender, 0.5-5.0 portions of nucleating agent, 0.1-0.5 portion of antioxidant and 0.3-0.5 portion of lubricant. The preparation method is that the components are evenly mixed on a high-speed mixer and melted and blended by a twin-screw extruder to prepare the composite material. The composite material has the advantages of good mobility, high tensile strength and high impact strength, which aims to realize low-cost and high-quality PET engineering plastic scale production to effectively substitute for high-grade plastics and expensive imported special materials.

Description

technical field [0001] The invention relates to the technical field of modification of engineering plastics, in particular to a glass fiber reinforced polyethylene terephthalate (PET) composite material and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a thermoplastic engineering plastic with excellent mechanical properties, electrical insulation, heat resistance and chemical resistance, so it is widely used in the fields of fibers, films and beverage bottles. At present, as far as the world is concerned, PET production capacity is overcapacitated and prices are falling. Products are gradually expanding from fiber polyester to non-fiber polyester (bottle flakes, films, engineering plastics). Engineering plastics are one of the research and development hotspots in the PET non-fiber field. China has become the world's largest producer and consumer of PET, but there are many problems in my country's polyester industry, which ar...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K13/06C08K9/06C08K7/14C08J5/08B29B9/14B29C47/92B29C48/40B29C48/92
CPCB29C47/92B29C48/92B29C2948/92704B29C48/40B29C2948/9259B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 施利毅丁鹏葛春华杨慧陈德杰胡秀兰
Owner SHANGHAI UNIV
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