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Cross-linkable ethylene-tetrafluoroethylene copolymer and synthetic method thereof

A tetrafluoroethylene copolymer and tetrafluoroethylene technology are applied in the field of cross-linkable ethylene-tetrafluoroethylene copolymer and its synthesis, which can solve the problems of thermal stability, chemical stability and mechanical properties of the polymer. The effect of high radiation resistance

Active Publication Date: 2016-10-26
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of polymer introduces more oligomers, which can effectively improve the processing performance of the polymer, but it will have a certain impact on the thermal stability, chemical stability and mechanical properties of the polymer.

Method used

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  • Cross-linkable ethylene-tetrafluoroethylene copolymer and synthetic method thereof
  • Cross-linkable ethylene-tetrafluoroethylene copolymer and synthetic method thereof
  • Cross-linkable ethylene-tetrafluoroethylene copolymer and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0033] The present invention is specifically illustrated by the following examples, but the present invention is not limited to these examples.

[0034] The composition ratio of each monomer unit in the polymkeric substance prepared by embodiment is passed F 19 -NMR and IR analysis and calculation.

[0035] The melt index is measured by a melt index meter, and the test standard is ASTM-D1238 (297°C*49N).

[0036] Add dicumyl peroxide with 2% content of polymer volume ratio, use brabender torque rheometer internal mixer to blend, use flat vulcanizer and dumbbell cutter to prepare standard sample, adopt ASTM D 638 standard The elongation at break and the tensile strength were measured.

[0037] Light transmittance, the polymer is tested by GBT2410-2008 method.

[0038] Tear resistance test: Under the condition of 300°C, extrude the polymer to form a 100μm thick film, according to the method of GB / T16578.9-2009, use the Elemendorf type testing machine to test.

Embodiment 1

[0040]Pour 3L of deionized water into a 5L stainless steel autoclave; 210g of trifluorotrichloroethane (CFC-113); 20g of 30% ammonium perfluorooctanoate solution; vacuumize the system until the oxygen content is below 10ppm. Add 25g of partial fluorocrotonate vinyl ester CF3CH=CH-COOCH=CH2 and 5.1g of methanol, raise the temperature while stirring, keep the temperature stable at 50°C, and add 25:75:20 molar ratio into the system with a compressor Ethylene\tetrafluoroethylene\hexafluoropropylene mixed gas to maintain a certain solubility of hexafluoropropylene in water until the pressure is 1.5MPa, increase the stirring speed to 350 rpm, and continuously pump 30mL containing The CFC-113 solution of 0.55g tert-butyl peroxypivalate initiates the polymerization reaction, and the mixed gas of ethylene\tetrafluoroethylene\hexafluoropropylene molar ratio is 48:43:5 (polymer ratio) is continuously fed to maintain The pressure is 1.2MPa to make the reaction continue. When the amount of...

Embodiment 2～4

[0042] As described in Example 1, the difference is that different amounts of CF3CH=CH-COOCH=CH2 were added, and the resulting polymer was analyzed. The relevant test results are listed in Table 1.

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Abstract

The invention relates to a cross-linkable ethylene-tetrafluoroethylene copolymer and a synthetic method thereof. A polymer is prepared from tetrafluoroethylene, ethylene, a monomer A and a monomer B through copolymerization, wherein the monomer A is a compound containing one double bond, and the monomer B is a compound containing two double bonds; and by virtue of proper crosslinking, the ethylene-tetrafluoroethylene copolymer can be endowed with relatively high radiation resistance, toughness, abradability, tensile strength and tear strength. The invention further provides a preparation method of the cross-linkable ethylene-tetrafluoroethylene copolymer and a cross-linkable copolymer composition. By controlling a polymerization process, too many low polymers can be reduced, and excellent performance of the polymer can be maintained.

Description

technical field [0001] The invention relates to a crosslinkable ethylene-tetrafluoroethylene copolymer and a synthesis method thereof, belonging to the technical field of polymer materials. Background technique [0002] Ethylene-tetrafluoroethylene copolymer (ETFE) has good chemical resistance, electrical properties and aging resistance. The pinhole-free coating film is suitable for anti-corrosion fields such as equipment linings. Films or cables with good electrical properties are suitable for In the fields of electronic computers, aerospace and other fields, the membrane materials with ultraviolet resistance and weather resistance can be used in the fields of facilities and architectural membranes in open air environments. For ETFE, the introduction of ethylene greatly improves the radiation resistance, and can be used in harsh environments with strong rays such as nuclear power plants and space stations. However, the degree of crosslinking of the polymer itself is limited...

Claims

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Application Information

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IPC IPC(8): C08F214/26C08F210/02C08F216/14C08F214/28C08F236/06C08F214/22C08F220/40
CPCC08F214/26C08F210/02C08F214/28C08F220/40C08F236/06C08F216/1408C08F214/22
Inventor 张永明李星陈庆芬刘体健王军赵彬王汉利范慧鹏
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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