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High-ductility heat-proof PCTG material and preparation method thereof

A ductile, high heat-resistant copolyester technology, applied in the field of copolyester materials, can solve the problems of inability to uniformly disperse elastomers, reduce the heat resistance of PCTG, and affect the usability of materials, so as to avoid the relatively low modification effect Poor, significant effect of modification, effect of improving ductility and heat resistance

Inactive Publication Date: 2015-05-13
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of elastic components into the PCTG matrix by physical blending has two disadvantages for the purpose of modification: first, the difference in molecular structure prevents the elastomer from being uniformly dispersed in PCTG, and the final modification The effect is not good; second, the introduction of elastic components will further reduce the heat resistance of PCTG, making it seriously affect the usability of the material
[0004] In CN102863769A, a kind of toughening method of PCTG fiber-reinforced material is provided, the toughness of PCTG fiber-reinforced material is improved by ethylene copolymer, and ethylene-acrylate-glycidyl methacrylate copolymer can act as a compatibilizer, Physical blending of ethylene-methyl acrylate binary copolymer and ethylene-vinyl acetate binary copolymer improves the toughness of the material, and the toughening is accompanied by a decrease in thermal deformation. This method still has great limitations

Method used

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  • High-ductility heat-proof PCTG material and preparation method thereof
  • High-ductility heat-proof PCTG material and preparation method thereof
  • High-ductility heat-proof PCTG material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Composition: 100 parts of PCTG (viscosity 0.6dL / g), 3 parts of AS graft (SAG-008), 0.5 parts of triphenyl phosphite, 30 parts of high heat-resistant copolyester TX2000 and polyester TPU (WHT- 1185EC) consists of 10 parts.

[0029] Preparation process: Dry the PCTG and high heat-resistant copolyester TX2000 at 60°C for 5 hours, then combine with the AS graft (SAG-008), triphenyl phosphite and polyester TPU (WHT-1185EC) Mix in a high speed mixer for 3 min. The above-mentioned mixed materials are added to the hopper of the twin-screw extruder, melted, blended, extruded, drawn, then water-cooled, dried, and pelletized. The speed of the twin-screw extruder is 200r / min. The temperature of each zone of the twin-screw extruder is controlled at 190°C.

Embodiment 2

[0031] Composition: 100 parts of PCTG (viscosity 0.8dL / g), 5 parts of POE graft (5805-L), 0.7 parts of triphenyl phosphite, 140 parts of high heat-resistant copolyester TX200 and 20 parts of TPEE (TPEE 4069) .

[0032] Preparation process: Dry the PCTG and high heat-resistant copolyester TX2001 at 70°C for 6 hours and mix them with POE graft (5805-L), triphenyl phosphite and TPEE (TPEE 4069) in a high-speed mixer 5min. The above-mentioned mixed materials are added to the hopper of the twin-screw extruder, melted and blended, extruded, drawn, then water-cooled, dried, and pelletized. The speed of the twin-screw extruder is 400r / min. The temperature of each zone of the twin-screw extruder was controlled at 220°C.

Embodiment 3

[0034] Composition: 100 parts of PCTG (viscosity 0.7dL / g), 4 parts of POE graft (5805-L), 0.6 parts of triphenyl phosphite, 35 parts of high heat-resistant copolyester TX2000 and 15 parts of TPEE (TPEE 4069) .

[0035] Preparation process: The PCTG and high heat-resistant copolyester TX2000 were dried at 65°C for 5.5 hours and then mixed with the POE graft (5805-L), triphenyl phosphite and TPEE (TPEE 4069) at high speed Mix in the machine for 4min. The above-mentioned mixed materials are added to the hopper of a twin-screw extruder, melted and blended, extruded, drawn, then water-cooled, dried, and pelletized. The speed of the twin-screw extruder is 300r / min. The temperature of each zone of the twin-screw extruder is controlled at 200°C.

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Abstract

The invention relates to a high-ductility heat-proof PCTG material and a preparation method thereof. The high-ductility heat-proof PCTG material is prepared from the following components and raw materials in parts by weight: 100 parts of PCTG, 3 to 5 parts of a compatilizer, 0.5 to 0.7 part of an ester exchange inhibitor, 30 to 40 parts of high heat-resistance copolyester, and 10 to 20 parts of polyester elastomer. The preparation method comprises the following steps: drying PCTG and high heat-resistance copolyester at the temperature of 60 to 70 DEG C for 5 to 6 hours; mixing with the compatilizer, the ester exchange inhibitor and the polyester elastomer for 3 to 5 minutes through a high-speed mixer; then adding a hopper of a double-screw extruder; melting; blending; extruding; drawing into strips; cooling by water drying; and cutting into particles to obtain the high-ductility heat-proof PCTG material. Compared with the prior art, the method has advantages.

Description

technical field [0001] The invention relates to a copolyester material, in particular to a high ductility heat-resistant PCTG material and a preparation method thereof. Background technique [0002] PCTG is a copolyester material based on PCT and PET. It is obtained by replacing a small part of 1,4-cyclohexanedimethanol (CHDM) in the PCT molecular chain with ethylene glycol (EG). The property is damaged, and the material is amorphous polyester. Therefore, in addition to the excellent mechanical properties, stress crack resistance and solvent resistance of polyester materials, the material greatly improves the brittleness of polyester materials, even comparable to PC. And it makes up for the defects of PC material such as notch sensitivity and easy stress cracking. Although the unmodified PCTG has excellent toughness, the PCTG sheet is still prone to material fracture after stretching and repeated plane bending, especially the impact strength of the material under the impact...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/00C08L51/06C08L51/00C08L75/04C08K5/526C08K5/5415
Inventor 李莉王尹杰杨涛孟成铭朱明源段家真
Owner SHANGHAI SUNNY
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