CN104845106A - Carbon-fiber-reinforced PET/PTT/TPEE composite material - Google Patents

Abstract

The invention discloses a carbon-fiber-reinforced PET/PTT/TPEE composite material. The material comprises the following components by weight: 30% to 60% of PET, 20% to 30% of PTT, 10% to 15% of TPEE, 3% to 5% of a compatibilizing agent, 5% to 15% of modified carbon fiber, 1% to 4% of nanometer silicon dioxide, 0.1% to 0.5% of an antioxidant and 0.1% to 1% of a lubricant, wherein the modified carbon fiber is chopped polypropionitrile carbon fiber which undergoes surface oxidation treatment by using a mixed acid solution of sulfuric acid with a mass content reaching more than 98% and nitric acid with a mass content reaching more than 60%. The invention has the following beneficial effects: the carbon-fiber-reinforced PET/PTT/TPEE composite material integrates respective advantages of PET, PTT and TPEE; meanwhile, through blending modification of surface oxidization of the carbon fiber, the material greatly improves strength, rigidity and heat resistance; and the material has good dimensional stability and exellent electrical performance and is applicable to industrial production, popularization and application.

Description

A kind of carbon fiber reinforced PET/PTT/TPEE matrix material

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of carbon fiber reinforced PET/PTT/TPEE matrix material.

Background technology

Polyethylene terephthalate (PET) a kind ofly has higher melt temperature and the crystalline polymer of second-order transition temperature, excellent physicals and mechanical property is kept in certain temperature range, its resistance to fatigue, rub resistance, ageing resistance, electrical insulating property feature are very outstanding, to most of organic solvent and acid more stable, production energy consumption is lower, is thus widely used in the fields such as synthon, film and engineering plastics; But because PET rigidity is comparatively forced toughness of material is poor, crystallization velocity is comparatively slow, the shortcomings such as the high and shaping cycle of forming mould temperature is long, greatly limit its range of application.Poly(Trimethylene Terephthalate) (PTT) is that a kind of crystallization velocity is fast, happy and harmonious temperature and the lower crystalline polymer of second-order transition temperature, there is excellent especially flexibility, elastic recovery, the stability feature of processing characteristics, electric property, mechanical property and size; But the defects such as the notched Izod impact strength of PTT is low, notch sensitivity large, dimensional stability is not high, thermotolerance is bad, poor fire, will limit its Application Areas.Polyether ester (TPEE) is polybutylene terephthalate-polyethylene oxide-poly(propylene oxide) thermoplastic elastomer, be the segmented copolymer obtained by copolycondensation by dimethyl terephthalate (DMT), butyleneglycol, polyethylene oxide glycol and/or polypropylene oxide glycol, there is good snappiness and mechanical property.By the PET/PTT/TPEE matrix material of blended to PET, PTT and TPEE preparation, can the advantage of comprehensive three well, realize the inaccessiable over-all properties of single variety, will there is very high practical value and good application prospect.

Summary of the invention

The object of the present invention is to provide the carbon fiber reinforced PET/PTT/TPEE matrix material of a kind of high strength, high heat resistance and good electrical properties.

The technical solution adopted for the present invention to solve the technical problems is: a kind of carbon fiber reinforced PET/PTT/TPEE matrix material, and its component by mass percent proportioning is: PET 30% ~ 60%, PTT 20% ~ 30%, TPEE 10% ~ 15%, compatilizer 3% ~ 5%, modified carbon fiber 5% ~ 15%, nano silicon 1% ~ 4%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

Described PET is polyethylene terephthalate.

Described PTT is Poly(Trimethylene Terephthalate).

Described TPEE is polybutylene terephthalate-polyethylene oxide-poly(propylene oxide) triblock copolymer.

Described compatilizer is styrene-grafted copolymer-maleic anhydride.

To be surface reach more than 98% sulfuric acid and mass content through mass content to described modified carbon fiber reaches the short of the mixed acid solution oxide treatment of more than 60% nitric acid and cut poly-propionitrile carbon fiber.

Described nano silicon is the aerosil nanoparticle of particle diameter at 20 ~ 40nm.

Described oxidation inhibitor is the one in the compound of antioxidant 1010, antioxidant 1076, antioxidant 1010 or antioxidant 1076 and irgasfos 168.

Described lubricant is the one in calcium stearate, silicone powder, pentaerythritol stearate.

The preparation method of above-mentioned a kind of carbon fiber reinforced PET/PTT/TPEE matrix material, comprises the following steps:

(1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by;

(2), cut mass content that poly-propionitrile carbon fiber adds volume ratio 3:1 reach more than 98% sulfuric acid and mass content reaches in the mixed acid solution of more than 60% nitric acid by short, supersound process 15 ~ 60 minutes at 60 DEG C ~ 90 DEG C temperature, then washed with de-ionized water is used 4 ~ 8 times, until pH value is not aobvious acid, again at 80 DEG C ~ 150 DEG C vacuum drying oven drying 24 ~ 48h, obtain described modified carbon fiber, stand-by;

(3), dry PET and PTT is taken by weight ratio, add the modified carbon fiber that step (2) obtains again by weight ratio, and add TPEE, compatilizer, nano silicon, oxidation inhibitor, lubricant by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging adds in twin screw extruder, extrudes, cooling granulation at 210 DEG C ~ 280 DEG C after melt blending, then dry, obtain a kind of carbon fiber reinforced PET/PTT/TPEE matrix material of the present invention.

The invention has the beneficial effects as follows, the present invention combines PET, PTT and TPEE advantage separately, and by surface oxidation carbon fiber blending and modifying, substantially increase intensity, rigidity and resistance toheat, its good stability of the dimension, electrical property is excellent, is suitable for suitability for industrialized production and applies.

Embodiment

Technical scheme of the present invention is further illustrated below in conjunction with specific embodiment.

Embodiment 1:

A kind of carbon fiber reinforced PET/PTT/TPEE matrix material, its component by mass percent proportioning is: PET 30%, PTT 30%, TPEE 15%, styrene-grafted copolymer-maleic anhydride 5%, modified carbon fiber 15%, nano silicon 4%, the compound 0.5% of antioxidant 1076 and irgasfos 168, pentaerythritol stearate 0.5%, to be surface reach more than 98% sulfuric acid and mass content through mass content to described modified carbon fiber reaches the short of the mixed acid solution oxide treatment of more than 60% nitric acid and cut poly-propionitrile carbon fiber, described nano silicon is the aerosil nanoparticle of particle diameter at 20 ~ 40nm.

Preparation method: (1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by, (2), cut mass content that poly-propionitrile carbon fiber adds volume ratio 3:1 reach more than 98% sulfuric acid and mass content reaches in the mixed acid solution of more than 60% nitric acid by short, supersound process 15 ~ 60 minutes at 60 DEG C ~ 90 DEG C temperature, then washed with de-ionized water is used 4 ~ 8 times, until pH value is not aobvious acid, again at 80 DEG C ~ 150 DEG C vacuum drying oven drying 24 ~ 48h, obtain described modified carbon fiber, stand-by, (3), take dry PET and PTT by weight ratio, add the modified carbon fiber that step (2) obtains again by weight ratio, and add TPEE by weight ratio, styrene-grafted copolymer-maleic anhydride, nano silicon, the compound of antioxidant 1076 and irgasfos 168, pentaerythritol stearate, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging adds in twin screw extruder, extrude after melt blending at 210 DEG C ~ 280 DEG C, cooling granulation, then dry, obtain a kind of carbon fiber reinforced PET/PTT/TPEE matrix material of the present invention.

Embodiment 2:

A kind of carbon fiber reinforced PET/PTT/TPEE matrix material, its component by mass percent proportioning is: PET 60%, PTT 20%, TPEE 10%, styrene-grafted copolymer-maleic anhydride 3%, modified carbon fiber 5%, nano silicon 1.5%, antioxidant 1010 0.1%, calcium stearate 0.4%, to be surface reach more than 98% sulfuric acid and mass content through mass content to described modified carbon fiber reaches the short of the mixed acid solution oxide treatment of more than 60% nitric acid and cut poly-propionitrile carbon fiber, and described nano silicon is the aerosil nanoparticle of particle diameter at 20 ~ 40nm.

Preparation method: (1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by; (2), cut mass content that poly-propionitrile carbon fiber adds volume ratio 3:1 reach more than 98% sulfuric acid and mass content reaches in the mixed acid solution of more than 60% nitric acid by short, supersound process 15 ~ 60 minutes at 60 DEG C ~ 90 DEG C temperature, then washed with de-ionized water is used 4 ~ 8 times, until pH value is not aobvious acid, again at 80 DEG C ~ 150 DEG C vacuum drying oven drying 24 ~ 48h, obtain described modified carbon fiber, stand-by; (3), dry PET and PTT is taken by weight ratio, add the modified carbon fiber that step (2) obtains again by weight ratio, and add TPEE, styrene-grafted copolymer-maleic anhydride, nano silicon, antioxidant 1010, calcium stearate by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging adds in twin screw extruder, extrude after melt blending at 210 DEG C ~ 280 DEG C, cooling granulation, then dry, obtain a kind of carbon fiber reinforced PET/PTT/TPEE matrix material of the present invention.

Claims (5)

1. a carbon fiber reinforced PET/PTT/TPEE matrix material, it is characterized in that, its component by mass percent proportioning is: PET 30% ~ 60%, PTT 20% ~ 30%, TPEE 10% ~ 15%, compatilizer 3% ~ 5%, modified carbon fiber 5% ~ 15%, nano silicon 1% ~ 4%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

2. a kind of carbon fiber reinforced PET/PTT/TPEE matrix material according to claim 1, it is characterized in that, described compatilizer is styrene-grafted copolymer-maleic anhydride.

3. a kind of carbon fiber reinforced PET/PTT/TPEE matrix material according to claim 1, it is characterized in that, to be surface reach more than 98% sulfuric acid and mass content through mass content to described modified carbon fiber reaches the short of the mixed acid solution oxide treatment of more than 60% nitric acid and cut poly-propionitrile carbon fiber.

4. a kind of carbon fiber reinforced PET/PTT/TPEE matrix material according to claim 1, is characterized in that, described nano silicon is the aerosil nanoparticle of particle diameter at 20 ~ 40nm.

5. the preparation method of a kind of carbon fiber reinforced PET/PTT/TPEE matrix material according to claim 1, is characterized in that, comprise the following steps:

(1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by;

(2), cut mass content that poly-propionitrile carbon fiber adds volume ratio 3:1 reach more than 98% sulfuric acid and mass content reaches in the mixed acid solution of more than 60% nitric acid by short, supersound process 15 ~ 60 minutes at 60 DEG C ~ 90 DEG C temperature, then washed with de-ionized water is used 4 ~ 8 times, until pH value is not aobvious acid, again at 80 DEG C ~ 150 DEG C vacuum drying oven drying 24 ~ 48h, obtain described modified carbon fiber, stand-by;

(3), dry PET and PTT is taken by weight ratio, add the modified carbon fiber that step (2) obtains again by weight ratio, and add TPEE, compatilizer, nano silicon, oxidation inhibitor, lubricant by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging adds in twin screw extruder, extrudes, cooling granulation at 210 DEG C ~ 280 DEG C after melt blending, then dry, obtain a kind of carbon fiber reinforced PET/PTT/TPEE matrix material of the present invention.