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Preparation method of PPS fibers with self-extinguishment and free of molten drops

A self-extinguishing, fiber technology, used in fiber processing, fiber types, textiles and papermaking, etc., can solve the problems of unfavorable industrial production, complex process, high cost, and achieve excellent mechanical properties, high glass transition temperature, and improved electrical conductivity. sexual effect

Active Publication Date: 2015-12-02
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current modification method is more complex, difficult to control, and the cost is relatively high, which is not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] The invention provides a kind of preparation method of the PPS fiber with self-extinguishing property and droplet-free, described preparation method comprises the following steps:

[0015] (1) Prepare the oxidizing agent solution: dissolve or disperse the oxidizing agent in the solvent to form an oxidizing agent solution with a mass concentration of 0.5-40wt%; preferably, the mass concentration of the oxidizing agent solution is 5%-15%.

[0016] (2) Dipping, washing and drying: immerse the PPS fiber in the oxidant solution, the quality of the PPS fiber accounts for 10-40wt% of the total mass of the PPS fiber and the oxidant solution, and the preferred mass fraction is 15-25%; the immersion temperature is 60-140°C , the preferred immersion temperature is 65-90°C; the immersion time is 10min-12h, the preferred immersion time is 0.5-2h; through the steps of solvent separation, washing and drying, the vacuum drying temperature is 60-180°C, and the preferred drying temperatur...

Embodiment 1

[0022] 3L10%H 2 o 2 and 500gPPS fibers (tensile strength 3.9CN / dt, elongation at break 20%), heated to 60°C under mechanical stirring, then kept for 10 minutes, and filtered the solution with 200-400 mesh steel mesh, and the PPS fibers were separated with deionized water. After washing for 3 times, vacuum-dry at 140°C for 12 hours to obtain PPS fibers with self-extinguishing properties and no droplet.

[0023] The prepared PPS fiber, 22% of the sulfur atoms on the surface is oxidized to sulfone, has self-extinguishing and no droplet phenomenon, the glass transition temperature reaches 165 ° C, the fiber tensile strength is 3.8CN / dt, and the elongation at break is 21%.

Embodiment 2

[0025] 10% KMnO 4 3L and 600gPPS fibers (tensile strength 4.2CN / dt, elongation at break 25%), heated to 60°C under mechanical stirring, then kept for 10 minutes, filtered the solution with 200-400 mesh steel mesh, and washed the PPS fibers with deionized water respectively After 3 times, vacuum-dry at 140° C. for 12 hours to obtain PPS fibers with self-extinguishing properties and no droplet.

[0026] 28% of the sulfur atoms on the surface of the prepared PPS fiber are oxidized to sulfone, which is self-extinguishing and has no droplet phenomenon. The glass transition temperature reaches 176°C, the tensile strength of the fiber is 4.0CN / dt, and the elongation at break is 23%.

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Abstract

The invention discloses a preparation method of PPS fibers with self-extinguishment and free of molten drops. The preparation method comprises the following steps: soaking a pure polyphenylene sulfide fiber serving as a raw material into an oxidant solution, controlling the soaking temperature and the soaking time by selecting the type of an oxidant, adjusting the oxidization degree of sulfur atoms on the surface of the fiber, performing solvent separation after an reaction, and washing and drying the PPS fibers. The preparation method is simple and feasible, and a complicated fiber modification method is eliminated; the performances, such as oxidization resistance, high-temperature resistance, creep resistance and molten drop resistance, of the prepared PPS fibers are greatly improved.

Description

technical field [0001] The invention relates to the preparation technology of PPS fibers, in particular to a preparation method of PPS fibers with self-extinguishing properties and no droplet. The method is to use an oxidant to partially oxidize the sulfur atoms (S) on the surface of polyphenylene sulfide fibers to sulfone (SO 2 ), the resulting selectively oxidized PPS fibers have the characteristics of no droplet and creep resistance. Background technique [0002] Polyphenylene sulfide (PPS for short) is a rigid main chain formed by benzene rings linking sulfur atoms on the pair. Due to the existence of a large number of π bonds in the structure, its performance is relatively stable. The biggest feature of PPS fiber is that it can be used for a long time under high temperature and extremely harsh working environment, and it is mainly used for thermal filter materials. With the development of high-tech research and application, people put forward higher requirements for h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/50D06M11/30D06M11/65D06M13/12D06M13/11D06M23/00D06M101/30
Inventor 李振环樊海彬苏坤梅
Owner TIANJIN POLYTECHNIC UNIV
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