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Heat-resistant super-ductility polyethylene terephthalate (PET) compound and preparation method thereof

A technology of polyethylene terephthalate and ductility, applied in the field of polyethylene terephthalate compound and its preparation, can solve the problem of heat resistance and tensile property curve without sharp yield point and yield stress and modulus increase, elongation at break and other problems, to achieve the effect of good ductility, high notched impact strength and super ductility, excellent super ductility and high impact

Active Publication Date: 2013-05-22
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermal aging of crystalline materials typically results in an increase in yield stress and modulus, as well as a decrease in elongation at break
When the pure PET material is annealed at 50°C, its elongation at break will drop significantly
[0004] Various PET toughening technologies currently used cannot simultaneously meet the requirements of heat resistance and tensile performance curves without sharp yield points

Method used

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  • Heat-resistant super-ductility polyethylene terephthalate (PET) compound and preparation method thereof
  • Heat-resistant super-ductility polyethylene terephthalate (PET) compound and preparation method thereof
  • Heat-resistant super-ductility polyethylene terephthalate (PET) compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 68 kg of polyethylene terephthalate (PET), 0.5 kg of heat stabilizer 1010, 0.5 kg of antioxidant 168, 1 kg of processing aid calcium stearate, 10 kg of ethylene-acrylate-methacrylic acid Glyceride (PTW), 10 kilograms of LLDPE, and 10 kilograms of SEBS are melt-mixed and dispersed in a twin-screw extruder with an aspect ratio of 1:40. The extrusion temperature is 240° C., extruded and granulated, and finally the product is obtained.

[0020] The product of the present invention has excellent heat resistance, good ductility and impact performance, its elongation at break can reach 200%, tensile strength ≥ 30MPa, flexural modulus ≥ 1200MPa, normal temperature (23°C) notched impact strength ≥ 45KJ / m 2 , low temperature (-30°C) notched impact strength ≥ 10KJ / m 2 , heat distortion temperature (0.45MPa) ≥ 140 ° C, 150 ° C after annealing for 120 hours, its mechanical properties are almost unchanged. The performance is as follows:

[0021]

Embodiment 2

[0023] 73 kilograms of polyethylene terephthalate (PET), 0.6 kilograms of heat stabilizer 1010, 0.4 kilograms of antioxidant 168, 1 kilogram of processing aid EBS, 10 kilograms of ethylene-acrylate-glyceryl methacrylate ( PTW), 8 kilograms of LLDPE, and 7 kilograms of SEBS are melted and mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 1: 40. The extrusion temperature is 240° C., extruded and granulated, and finally obtained the product.

[0024] The product of the present invention has excellent heat resistance, good ductility and impact performance, its elongation at break can reach 200%, tensile strength ≥ 30MPa, flexural modulus ≥ 1200MPa, normal temperature (23°C) notched impact strength ≥ 45KJ / m 2 , low temperature (-30°C) notched impact strength ≥ 10KJ / m 2 , heat distortion temperature (0.45MPa) ≥ 140 ° C, 150 ° C after annealing for 120 hours, its mechanical properties are almost unchanged. The performance is as follows:

[0025]

...

Embodiment 3

[0028] 75 kilograms of polyethylene terephthalate (PET), 1.0 kilograms of heat stabilizer 1010, 0.8 kilograms of antioxidant 168, 0.2 kilograms of processing aid EBS, 12 kilograms of ethylene-acrylate-glyceryl methacrylate ( PTW), 5 kilograms of LDPE, and 6 kilograms of SBS are melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 1:40, and the extrusion temperature is 240° C., extruded and granulated, and finally obtained the product.

[0029] The product of the present invention has excellent heat resistance, good ductility and impact performance, its elongation at break can reach 200%, tensile strength ≥ 30MPa, flexural modulus ≥ 1200MPa, normal temperature (23°C) notched impact strength ≥ 45KJ / m 2 , low temperature (-30°C) notched impact strength ≥ 10KJ / m 2 , heat distortion temperature (0.45MPa) ≥ 140 ° C, 150 ° C after annealing for 120 hours, its mechanical properties are almost unchanged. The performance is as follows:

[0030] ...

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Abstract

The invention discloses a heat-resistant super-ductility polyethylene terephthalate (PET) compound and a preparation method thereof. The heat-resistant super-ductility PET compound is prepared from the following components in percentage by weight: 20-90% of PET, 0-2% of heat stabilizer, 0-2% of lubricant and 10-76% of composite toughener. By adopting the A+B+C type composite toughener and utilizing the synergic toughening action, the invention achieves the effects of heat resistance and super ductility, solves the problem that the ductility and toughness are greatly lowered after the PET material is subjected to heat treatment, and implements high notch impact strength and super ductility. The tensile property curve of the material does not have any yield point; and after the material is annealed at 150 DEG C for 120 hours, the toughness and ductility are not influenced, and the tensile property curve also does not have any yield point. The heat-resistant super-ductility polyethylene terephthalate compound can be widely used for manufacturing automobile interior and exterior ornaments, and can protect people in the automobile in an emergency.

Description

technical field [0001] The invention relates to a heat-resistant super-ductile polyethylene terephthalate (PET) compound and a preparation method thereof, in particular to a high-ductility, high-temperature notch used in the field of automotive interior and exterior decoration Polyethylene terephthalate (PET) compound with impact strength and excellent heat resistance and its preparation method. Background technique [0002] Crystalline polymers such as polyethylene terephthalate (PET) show a sharp yield point when subjected to tensile stress, and the stress gradually increases with the increase of strain after passing the yield point. The strain hardening of this material is detrimental to the safety of the occupants when used in the automotive field, and it is prone to sharp fragments in the event of an accident. If there is no sharp yield point in the tensile performance curve of the material, the stress does not increase with the increase of strain after the material yi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/08C08L23/00C08L23/06C08L53/02B29B7/28B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 孙刚陈延安周英辉李国明程文超李欣李志平丁超罗忠富
Owner SHANGHAI KINGFA SCI & TECH
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