Preparation method of modified polytrifluorochloroethylene material

A polychlorotrifluoroethylene, modified technology, applied in the field of polymer compound preparation, can solve the problems of PCTFE product performance degradation, limited application range and production capacity, injection molding processing difficulties, etc., to achieve product performance improvement, chlorine free The effect of reducing the base activity and shortening the melting and plasticizing time

Inactive Publication Date: 2013-12-18
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature at which PCTFE obtains a convenient processing viscosity is 250-320°C, but its starting decomposition temperature is 310°C, the processing temperature is very close to the decomposition temperature, and due to the influence of shear heat during the injection process, its decomposition will be further aggravated, so PCTFE The proces...

Method used

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  • Preparation method of modified polytrifluorochloroethylene material
  • Preparation method of modified polytrifluorochloroethylene material
  • Preparation method of modified polytrifluorochloroethylene material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] PCTFE600g, rare earth composite stabilizer 36g, N,N'-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine 6g, acrylate 6g, stearic acid 6g, PE 12g of wax is mixed, and after mixing, it is added to a mixer for melting and plasticization. The mixing processing temperature is 265°C and the rotation speed is 30r / min; the product made by the mixing machine is added to an injection molding machine for injection processing. The processing temperature of the injection molding machine is 260 ℃, the mold temperature is 100 ℃, injection molded standard splines; referring to the above tensile strength standard, bending strength standard, impact strength standard and Vicat heat distortion temperature standard, the performance test and result characterization of the sample are carried out.

Embodiment 2

[0019] Repeat the same steps as described in Example 1, but in Example 2, raw material PCTFE, rare earth composite stabilizer, N, N'-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl ) Propionyl]hydrazine, acrylate, stearic acid and PE wax are respectively 600g, 48g, 6g, 6g, 6g and 12g.

Embodiment 3

[0021] Example 1 was repeated in the same steps as described, but the kneading processing temperature in Example 3 was 255°C.

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Abstract

The invention relates to a preparation method of a modified polytrifluorochloroethylene material. The method comprises the following steps of: mixing PCTFE (polychlorotrifluoroethylene), a rare earth complex stabilizer, N,N'-bi[Beta-(3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] hydrazine, acrylic ester, stearic acid and PE wax together according to the mass ratio of 100:6-8:0.5-1:1-2:0.5-1:1-2, and adding the mixture into a mixing mill for melting and plasticizing, wherein the mixing processing temperature is 250-280 DEG C, and the revolving speed is 20-50r/min. The preparation method effectively broadens the processing window of PCTFE, makes the PCTFE material be subjected to injection molding while keeping better performance, plays an important role in expansion of application range of PCTFE products, and provides research basis and practical guiding significance to industrial production of the PCTFE products.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer compounds, and in particular relates to a preparation method of a modified polychlorotrifluoroethylene material. technical background [0002] Polychlorotrifluoroethylene (PCTFE) is a polymer with good chemical inertness, chemical corrosion resistance, and excellent dielectric and optical properties. Among all plastics, it has the lowest water vapor permeability, does not permeate any gas, does not support combustion, and is a good barrier polymer. PCTFE is mainly used in electronics, electrical, low temperature resistant devices, medical, chemical and other fields. [0003] PCTFE has a certain fluidity when it is heated to a higher temperature. Its melting temperature is 215°C, but its melt viscosity is still high at 230°C. Due to its high melt viscosity during processing, it must be processed at a higher temperature range to make it fluid enough for injection processing. The te...

Claims

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Application Information

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IPC IPC(8): C08L27/12C08K13/02C08K3/00C08K5/25C08K5/101C08K5/09
Inventor 冯钠于国健张桂霞王洁
Owner DALIAN POLYTECHNIC UNIVERSITY
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