CN104845275A - High-strength high-toughness modified PET/PTT alloy material - Google Patents

Abstract

The invention discloses a high-strength high-toughness modified PET/PTT alloy material, which comprises the following components by mass: 37%-63% of PET, 20%-30% of PTT, 8%-15% of modified carbon fiber, 5%-10% of a plasticizer, 2%-4% of AS-g-GMA, 1%-3% of nano-silicon dioxide, 0.1%-0.5% of an antioxidant, and 0.1%-1% of a lubricant. The modified carbon fiber is short cut polyacrylonitrile carbon fiber with the surface subjected to oxidation pre-treatment and gamma-aminopropyl trimethoxy silane coupling agent activation treatment. The high-strength high-toughness modified PET/PTT alloy material provided by the invention integrates the respective advantages of PET and PTT, also has the advantages of high strength, high modulus, high toughness, good electrical conductivity, thermal conductivity and thermal stability, etc., and has the characteristics of good size stability, strong chemical resistance, low cost and wide adaptability.

Description

A kind of high-strength and high ductility modified PET/PTT alloy material

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of high-strength and high ductility modified PET/PTT alloy material.

Background technology

Polyethylene terephthalate (PET)/Poly(Trimethylene Terephthalate) (PTT) belongs to a kind of novel plastic alloy material, it has excellent physicochemical property and processing characteristics, and cost is low, thus will have broad application prospects in automobile, electric, the field such as household electrical appliances, fiber.But the mechanical property of PET/PTT is unstable, resistance to high-heat performance is poor, will limit its effect.

Summary of the invention

The object of the present invention is to provide a kind of high-strength and high ductility modified PET/PTT alloy material.

The technical solution adopted for the present invention to solve the technical problems is: a kind of high-strength and high ductility modified PET/PTT alloy material, and its component by mass percent proportioning is: PET 37% ~ 63%, PTT 20% ~ 30%, modified carbon fiber 8% ~ 15%, softening agent 5% ~ 10%, AS-g-GMA 2% ~ 4%, nano silicon 1% ~ 3%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

Described PET is polyethylene terephthalate.

Described PTT is Poly(Trimethylene Terephthalate).

Described modified carbon fiber is that surface cuts polyacrylonitrile carbon fiber through oxidation pre-treatment by the short of γ-aminopropyltrimethoxysilane coupling agent activation treatment.

Described softening agent is the thermoplastic polyether ester TPEE of mass ratio 4:1 and the compound of poly-hexanodioic acid isobutyl diester.

Described AS-g-GMA is acrylonitritrile-styrene resin graft glycidyl methacrylate.

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 pentaerythritol stearate.

The preparation method of above-mentioned a kind of high-strength and high ductility modified PET/PTT alloy 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 polyacrylonitrile carbon fiber is placed in volume ratio 3:1 and reach short the mixed acid solution that more than 98% sulfuric acid and mass content reach more than 60% nitric acid, under ultra-sonic oscillation and mechanical stirring, process 2 ~ 4h, then use a large amount of washed with de-ionized water to neutral, again the carbon fiber obtained is placed in mass content 0.1% ~ 1% the deionized water solution ultrasonic disperse 2 ~ 4h of γ-aminopropyltrimethoxysilane coupling agent, then filter, and by gained much filtrate in 120 DEG C ~ 150 DEG C vacuum drying oven drying 24 ~ 48h, obtain described modified carbon fiber, stand-by,

(3), taking dry PET and PTT by weight ratio adds in super mixer, add the modified carbon fiber that step (2) is obtained again, and add softening agent, AS-g-GMA, nano silicon, oxidation inhibitor, lubricant by weight ratio, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging adds in twin screw extruder, extrude through melting mixing at 210 DEG C ~ 280 DEG C temperature, cooling granulation, drying, obtain a kind of high-strength and high ductility modified PET/PTT alloy material of the present invention.

The invention has the beneficial effects as follows, the present invention combines PET and PTT advantage separately, and has the advantages such as high strength, high-modulus, high tenacity and good conductive, heat conduction and thermostability, and good stability of the dimension, chemical resistance is strong, and cost is low, wide adaptability.

Embodiment

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

Embodiment 1:

A kind of high-strength and high ductility modified PET/PTT alloy material, its component by mass percent proportioning is: PET 37%, PTT 30%, modified carbon fiber 15%, softening agent 10%, AS-g-GMA 4%, nano silicon 3%, the compound 0.5% of antioxidant 1076 and irgasfos 168, pentaerythritol stearate 0.5%, described modified carbon fiber is that surface is through oxidation pre-treatment, and cut polyacrylonitrile carbon fiber by the short of γ-aminopropyltrimethoxysilane coupling agent activation treatment, described softening agent is the thermoplastic polyether ester TPEE of mass ratio 4:1 and the compound of poly-hexanodioic acid isobutyl diester.

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 polyacrylonitrile carbon fiber is placed in volume ratio 3:1 and reach short the mixed acid solution that more than 98% sulfuric acid and mass content reach more than 60% nitric acid, under ultra-sonic oscillation and mechanical stirring, process 2 ~ 4h, then use a large amount of washed with de-ionized water to neutral, again the carbon fiber obtained is placed in mass content 0.1% ~ 1% the deionized water solution ultrasonic disperse 2 ~ 4h of γ-aminopropyltrimethoxysilane coupling agent, then filter, and by gained much filtrate in 120 DEG C ~ 150 DEG C vacuum drying oven drying 24 ~ 48h, obtain described modified carbon fiber, stand-by, (3), taking dry PET and PTT by weight ratio adds in super mixer, add the modified carbon fiber that step (2) is obtained again, and add compound, the pentaerythritol stearate of softening agent, AS-g-GMA, nano silicon, antioxidant 1076 and irgasfos 168 by weight ratio, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging adds in twin screw extruder, extrude through melting mixing at 210 DEG C ~ 280 DEG C temperature, cooling granulation, drying, obtain a kind of high-strength and high ductility modified PET/PTT alloy material of the present invention.

Embodiment 2:

A kind of high-strength and high ductility modified PET/PTT alloy material, its component by mass percent proportioning is: PET 63%, PTT 20%, modified carbon fiber 8%, softening agent 5%, AS-g-GMA 2.5%, nano silicon 1%, antioxidant 1010 0.1%, pentaerythritol stearate 0.4%, described modified carbon fiber is that surface cuts polyacrylonitrile carbon fiber through oxidation pre-treatment by the short of γ-aminopropyltrimethoxysilane coupling agent activation treatment, and described softening agent is the thermoplastic polyether ester TPEE of mass ratio 4:1 and the compound of poly-hexanodioic acid isobutyl diester.

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 polyacrylonitrile carbon fiber is placed in volume ratio 3:1 and reach short the mixed acid solution that more than 98% sulfuric acid and mass content reach more than 60% nitric acid, under ultra-sonic oscillation and mechanical stirring, process 2 ~ 4h, then use a large amount of washed with de-ionized water to neutral, again the carbon fiber obtained is placed in mass content 0.1% ~ 1% the deionized water solution ultrasonic disperse 2 ~ 4h of γ-aminopropyltrimethoxysilane coupling agent, then filter, and by gained much filtrate in 120 DEG C ~ 150 DEG C vacuum drying oven drying 24 ~ 48h, obtain described modified carbon fiber, stand-by, (3), taking dry PET and PTT by weight ratio adds in super mixer, add the modified carbon fiber that step (2) is obtained again, and add softening agent, AS-g-GMA, nano silicon, antioxidant 1010, pentaerythritol stearate by weight ratio, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging adds in twin screw extruder, extrude through melting mixing at 210 DEG C ~ 280 DEG C temperature, cooling granulation, drying, obtain a kind of high-strength and high ductility modified PET/PTT alloy material of the present invention.

Claims (4)

1. high-strength and high ductility modified PET/PTT alloy material, it is characterized in that, its component by mass percent proportioning is: PET 37% ~ 63%, PTT 20% ~ 30%, modified carbon fiber 8% ~ 15%, softening agent 5% ~ 10%, AS-g-GMA 2% ~ 4%, nano silicon 1% ~ 3%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

2. a kind of high-strength and high ductility modified PET/PTT alloy material according to claim 1, it is characterized in that, described modified carbon fiber is that surface cuts polyacrylonitrile carbon fiber through oxidation pre-treatment by the short of γ-aminopropyltrimethoxysilane coupling agent activation treatment.

3. a kind of high-strength and high ductility modified PET/PTT alloy material according to claim 1, is characterized in that, described softening agent is the thermoplastic polyether ester TPEE of mass ratio 4:1 and the compound of poly-hexanodioic acid isobutyl diester.

4. the preparation method of a kind of high-strength and high ductility modified PET/PTT alloy 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 polyacrylonitrile carbon fiber is placed in volume ratio 3:1 and reach short the mixed acid solution that more than 98% sulfuric acid and mass content reach more than 60% nitric acid, under ultra-sonic oscillation and mechanical stirring, process 2 ~ 4h, then use a large amount of washed with de-ionized water to neutral, again the carbon fiber obtained is placed in mass content 0.1% ~ 1% the deionized water solution ultrasonic disperse 2 ~ 4h of γ-aminopropyltrimethoxysilane coupling agent, then filter, and by gained much filtrate in 120 DEG C ~ 150 DEG C vacuum drying oven drying 24 ~ 48h, obtain described modified carbon fiber, stand-by,

(3), taking dry PET and PTT by weight ratio adds in super mixer, add the modified carbon fiber that step (2) is obtained again, and add softening agent, AS-g-GMA, nano silicon, oxidation inhibitor, lubricant by weight ratio, make to be mixed together 3 ~ 5 minutes, after fully mixing, discharging adds in twin screw extruder, extrude through melting mixing at 210 DEG C ~ 280 DEG C temperature, cooling granulation, drying, obtain a kind of high-strength and high ductility modified PET/PTT alloy material of the present invention.