Polyethylene terephthalate composite material and method of producing the same

A technology of polyethylene terephthalate and composite materials, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of narrow application areas, unsatisfactory requirements, and few varieties of industrial production, so as to meet the needs, Wide range of applications and the effect of increasing the crystallization rate

Inactive Publication Date: 2011-04-27
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic salt is a low-cost crystallization nucleating agent, but affected by the particle size and degree of dispersion, it is very limited in improving the crystallization rate of polyethylene terephthalate, which is far from meeting the requirements of polyethylene terephthalate. Requirements for the use of esters as engineering plastics
Therefore, there are few industrialized production varieties of polyethylene terephthalate engineering plastics, and the application area is narrow.

Method used

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  • Polyethylene terephthalate composite material and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 70 parts of polyethylene terephthalate, carapace liquid crystal poly[vinyl terephthalate (p-methoxyphenol) ester] (PMPCS) molecular weight 15000, 1 part of molecular weight distribution 1.5, crystallization accelerator polyethylene glycol 5 parts of alcohol and 1 part of other additives are mixed by high-speed stirring. Then it is sent into the twin-screw extruder by the precision metering feeder, and then 23 parts of the glass fiber filled with reinforcing agent are sent into the twin-screw extruder from the precision metering feeder, plasticized, melted, compounded, and then extruded, Stranding, cooling, pelletizing, drying and packaging the finished product.

Embodiment 2

[0018] 80 parts of polyethylene terephthalate, carapace liquid crystal poly[vinyl terephthalate (p-methoxyphenol) ester] (PMPCS) molecular weight 25000, 1 part of molecular weight distribution 1.3, crystallization accelerator polypropylene glycol 4 1 part and 1 part of other additives are stirred and mixed at high speed, and then sent into the twin-screw extruder by a precision metering feeder, and then 13 parts of glass fiber filling reinforcement are sent into the twin-screw extruder from the precision metering feeder, Plasticizing, melting, compounding, and then extruding, drawing, cooling, pelletizing, drying and packaging the finished product.

Embodiment 3

[0020] 60 parts of polyethylene terephthalate, carapace liquid crystal poly[vinyl terephthalate (p-methoxyphenol) ester] (PMPCS) molecular weight 35000, 1 part of molecular weight distribution 1.8, 6 parts of crystallization accelerator and 1.7 parts of other additives are mixed with high-speed stirring, and then sent to the twin-screw extruder by a precision metering feeder, and then 31 parts of carbon fiber filled with a reinforcing agent are sent to the twin-screw extruder from the precision metering feeder, plasticized , melting, compounding, and then extruded, drawn, cooled, pelletized, dried and packaged.

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Abstract

The present invention relates to a polyethylene terephthalate composite material and a preparation method thereof. The method comprises that: 40 weight portions to 80 weight portions of polyethylene terephthalate, 0.1 weight portions to 4 weight portions of macromolecule nucleating agent testa liquid crystal, 1 weight portion to 6 weight portions of macromolecule crystallization accelerator, and 0.5 weight portions to 1 weight portion of other processing aids are stirred and mixed at a high speed; the mixture is then sent into a double-screw extruder through a material feeder of precise measurement. Then 10 weight portions to 50 weight portions of intensifier is filled into the double-screw extruder through the material feeder of precise measurement. The product can be prepared after plasticization, melting, compounding, and then extruding, bracing, cooling, pelletizing and drying. Compared with the prior art, the present invention has the characteristics of improving the crystallization rate of polyethylene terephthalate, widening the application scope, meeting the demands of engineering plastics for polyethylene terephthalate.

Description

technical field [0001] The invention relates to the field of polymer material engineering plastics and its molding processing, in particular to a PET composite material containing carapace liquid crystal as a nucleating agent and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a crystalline high polymer with excellent comprehensive properties. However, due to the high rigidity of the main chain of PET and the slow movement of chain breaking, the crystallization speed is slow. The application in the field of engineering plastics is limited, specifically: high injection mold temperature, long molding cycle, easy mold sticking and warping of products, thus greatly limiting its application in the field of engineering plastics. [0003] Improving the crystallization rate is the key to improving the molding processability of polyethylene terephthalate (PET). At present, research in this area is still in the stage of laboratory explo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/03C09K19/38B29C47/40B29B9/12
Inventor 王鹏解廷秀杨桂生
Owner HEFEI GENIUS NEW MATERIALS
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