Modified polytetrafluoroethylene, preparation method of modified polytetrafluoroethylene and application of modified polytetrafluoroethylene to high frequency connector

A technology of polytetrafluoroethylene and tetrafluoroethylene, which is applied in the field of preparation and composite materials, can solve problems such as high crystallinity and melt viscosity, excessive material waste, and difficult molding, and achieve good mechanical toughness

Active Publication Date: 2013-03-20
NANJING COMPTECH COMPOSITES CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high crystallinity and melt viscosity of PTFE, it is often only possible to manufacture simple products by molding and extrusion processes, which is difficult to form, and irregular-shaped products must be processed by later machine tools. Molded with polytetrafluoroethylene and then machined, which restricts the production efficiency of the product, and in the process of processing, the material waste is too large, which is not conducive to cost saving

Method used

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  • Modified polytetrafluoroethylene, preparation method of modified polytetrafluoroethylene and application of modified polytetrafluoroethylene to high frequency connector

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Add 6.5g of ammonium persulfate as an initiator and 623.2g of methanol as a transfer agent in a stainless steel autoclave with a stirring device with a volume of 6000cc. Close the reaction kettle, fill the kettle with tetrafluoroethylene repeatedly to exhaust the air, then inject 3450ml of deionized water and 75g of perfluoropropyl vinyl ether, then heat to 70°C, and then fill the kettle with tetrafluoroethylene The pressure was 2.6Mpa, and tetrafluoroethylene was added during the reaction to keep the pressure constant, the stirring rate was 130rpm, and the reaction was stopped after 20 minutes.

[0033] The performance parameters of the prepared modified PTFE are shown in Table 1.

[0034] Table 1. Performance parameters of modified PTFE

[0035] project unit value density g / cm 3 2.15—2.4 Water absorption (24H) % ＜0.05 Tensile Strength MPa 22.5—28 Bending strength MPa 12—16 compressive strength MPa 8 Impact st...

Embodiment 2

[0038] Add 8.6g of ammonium persulfate as an initiator and 866.2g of methanol as a transfer agent in a stainless steel autoclave with a stirring device with a volume of 6000cc. Close the reaction kettle, fill the kettle with tetrafluoroethylene repeatedly to exhaust the air, then inject 3450ml of deionized water and 86.2g of perfluoropropyl vinyl ether, then heat to 70°C, and then fill the kettle with tetrafluoroethylene The internal pressure was 2.6Mpa, and tetrafluoroethylene was added during the reaction to keep the pressure constant, the stirring rate was 130rpm, and the reaction was stopped after 20 minutes.

Embodiment 3

[0040] Add 5.5g of ammonium persulfate as an initiator and 352.4g of methanol as a transfer agent in a stainless steel autoclave with a stirring device with a volume of 6000cc. Close the reaction kettle, fill the kettle with tetrafluoroethylene repeatedly to exhaust the air, then inject 3450ml of deionized water and 69g of perfluoropropyl vinyl ether, then heat to 70°C, and then fill the kettle with tetrafluoroethylene The pressure was 2.6Mpa, and tetrafluoroethylene was added during the reaction to keep the pressure constant, the stirring rate was 130rpm, and the reaction was stopped after 20 minutes.

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Abstract

The invention provides a modified polytetrafluoroethylene, a preparation method of the modified polytetrafluoroethylene and application of the modified polytetrafluoroethylene to a high frequency connector. The modified polytetrafluoroethylene is obtained through polymerization reaction of tetrafluoroethylene and perfluoropropoxyethylene; a side group is introduced into a molecular chain of the polytetrafluoroethylene; crystallinity and melt viscosity of the polytetrafluoroethylene are reduced; and when original excellent performance of the polytetrafluoroethylene is basically kept, processing performance of the polytetrafluoroethylene is improved to enable the modified polytetrafluoroethylene to be formed by injection molding, so that the production process is simplified and the production efficiency is improved. When the high frequency connector is produced, the injection molding can be carried out in one step and the post processing step is omitted.

Description

technical field [0001] The invention relates to a composite material, a preparation method and its application on a connector, in particular to a modified polytetrafluoroethylene, a preparation method and its application on a high-frequency connector. Background technique [0002] Polytetrafluoroethylene (PTFE) is one of the best corrosion-resistant materials in the world today. It has high chemical stability and excellent chemical corrosion resistance, such as resistance to strong acids, strong alkalis, strong oxidants, etc., and has outstanding heat resistance. , cold resistance and friction resistance, the long-term use temperature range is -200-+250 ℃, and has excellent electrical insulation, and is not affected by temperature and frequency. In addition, it has the characteristics of non-sticking, non-absorbent, non-combustible, etc. It can be used in any kind of chemical medium for a long time, and has been widely used as sealing material and filling material. Its prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F216/14C08L27/18B29B9/06B29C45/76
Inventor 杨文光靳予孙克原陈卓陈佩民孟杨
Owner NANJING COMPTECH COMPOSITES CORP
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