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Method for preparing ultraviolet-resistant polyphenylene sulfide resin by in situ Polymerization

A polyphenylene sulfide resin and anti-ultraviolet technology, which is applied in the field of preparation of anti-ultraviolet polyphenylene sulfide, can solve the problems of decreased mechanical properties of fibers, poor dispersion of light stabilizers, easy agglomeration of light stabilizers, etc., to reduce chroma The effect of deepening, avoiding agglomeration, and improving mechanical properties

Inactive Publication Date: 2008-03-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly limits the application field of PPS fiber
[0004] At present, the conventional method for improving light performance is to add a light stabilizer to the polymer, and then carry out blending modification, for example: CN1147033 about polypropylene, CN1180080 about CN1244545 about polyester, but the product prepared by this method, The dispersibility of the light stabilizer in the polymer is poor, and the light stabilizer is easy to agglomerate in the polymer matrix, forming a stress concentration point, which reduces the mechanical properties of the fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Nano-TiO 2 Particle handling:

[0031] Stir 2 g of titanate coupling agent and 20 ml of ethanol solution with a volume concentration of 95% and ultrasonically oscillate for 30 min, then add 8 g of nano-TiO 2 Particles, stirred and ultrasonically oscillated for 30 minutes, heated, refluxed at constant temperature for 4 hours, dried, and ground to obtain nano-TiO treated with titanate coupling agent 2 particle;

[0032] With 193ml (2.0mol) N-methylpyrrolidone and 127.2 grams (1.0mol) Na 2 S·9H 2 Add O into the reactor, heat to 200°C, react for 2 hours, remove the crystallization water of sodium sulfide, and then cool to 100°C.

[0033] Then add 9 grams of titanate coupling agent surface-treated nano-TiO 2 , 5 grams of benzotriazole, 149.9 grams (1.02mol) of p-dichlorobenzene and 13.6 grams (0.1mol) of catalyst sodium acetate, under nitrogen, start stirring, react at 255 ° C for three hours, cool naturally, and then normal pressure Filter, wash with tap water six tim...

Embodiment 2

[0052] Nano-TiO 2 The treatment of particles is the same as in Example 1.

[0053] With 193ml (2.0mol) N-methylpyrrolidone and 127.2 grams (1.0mol) Na 2 S·9H 2 O was added to the reactor, heated to 210°C, and reacted for 1 hour. Then cool to 100°C.

[0054] Then add 2 grams of titanate coupling agent surface-treated nano-TiO 2 , 5 grams of benzotriazole, 149.9 grams (1.02mol) of p-dichlorobenzene and 13.8 grams (0.1mol) of potassium carbonate catalyst, under the condition of nitrogen, start stirring, react at 230°C for three hours, then filter under normal pressure, tap water After washing six times and drying, the polyphenylene sulfide resin powder can be obtained.

[0055]Adopt the same method spinning of embodiment 1, obtain anti-ultraviolet polyphenylene sulfide fiber,

[0056] Table 3 Chromaticity change of polyphenylene sulfide fiber before and after ultraviolet light

[0057] sample

Unilluminated PPS fiber

PPS fiber after 50 hours of light

ΔE...

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PUM

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Abstract

The present invention is in-situ polymerization process for preparing ultraviolet resisting polyphenyl thioether resin. The process includes the following steps: 1. reaction of titanate coupling treated nanometer TiO2 and benzotriazole in 0.1-10 wt%, and monomers p-dichlorobenzene and sodium sulfide in 90-99.9 wt% inside solvent, in nitrogen atmosphere and in the presence of catalyst; and collecting ultraviolet resisting polyphenyl thioether resin powder from the reaction product; 2. pelletizing and slicing; and 3. spinning, winding and stretching to obtain fiber. The ultraviolet resisting polyphenyl thioether fiber has less color deepening caused by ultraviolet and high mechanical performance before and after ultraviolet irradiation.

Description

technical field [0001] The invention relates to a preparation method of anti-ultraviolet polyphenylene sulfide. Background technique [0002] Polyphenylene Sulfide (PPS) is a linear high molecular weight crystalline polymer with excellent high temperature resistance, chemical corrosion resistance, flame retardancy and dimensional stability. The strength and heat resistance of PPS fibers are similar to Nomex and other aramid fibers, and the corrosion resistance is better than Nomex, second only to PTFE fibers. It can be used for insulation and flame retardancy in aerospace and military fields. In recent years, It has become one of the most important high-performance thermoplastic polymer materials and maintains a high growth rate worldwide. [0003] At present, in the research on the formation of PPS fibers, it is found that both imported and domestic PPS fibers will change in color under light conditions. Brittle, strength decreased significantly. This greatly limits the ...

Claims

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Application Information

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IPC IPC(8): C08G75/02C08K13/02C08G75/0213C08G75/0254
Inventor 朱美芳吴文华陈龙陈彦模闫波赵晓燕
Owner DONGHUA UNIV
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