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Method for improving creep resistant performance of ultra-high molecular weight polyethylene fiber

A polyethylene fiber, ultra-high molecular weight technology, applied in fiber types, fiber processing, textiles and papermaking, etc., can solve the problem of single initiator, without considering the method of co-initiation of photosensitizer and thermal initiator, ultra-high molecular weight polyethylene The improvement of fiber creep resistance is not obvious, and the effects of increasing creep resistance, hindering relative slippage and improving crosslinking efficiency are achieved.

Active Publication Date: 2012-06-13
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, these methods do not significantly improve the creep resistance of ultra-high molecular weight polyethylene fibers, and the selection of the initiator starts with a single photosensitizer, and does not consider the method of co-initiating the photosensitizer and thermal initiator.

Method used

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  • Method for improving creep resistant performance of ultra-high molecular weight polyethylene fiber

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Experimental program
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Effect test

Embodiment 1

[0026] (1) Take a certain length of ultra-high molecular weight polyethylene and immerse it in n-heptane for 12 hours to swell;

[0027] (2) Use acetone solution to wash it with ultrasonic vibration, the frequency of ultrasonic vibration is 50 Hz, the temperature is 20 ° C, the time is 10 minutes, and then it is dried in an oven at 25 ° C to constant weight;

[0028] (3) Preparation of cross-linking liquid: the amount of cross-linking agent added is 20% of the mass of acetone; the initiator includes photosensitizer and thermal initiator, and the total amount of the two added is 1% of the mass of acetone. The ratio of the photosensitizer to the thermal initiator is photosensitizer:thermal initiator=1:9. The photosensitizer is benzophenone, and the thermal initiator is dicumyl peroxide.

[0029] (4) Pass nitrogen gas into the cross-linking solution for 10 minutes to fully catch oxygen, then soak the pretreated UHMWPE fiber in the cross-linking solution, and continue to pass nit...

Embodiment 2

[0032] (1) Take a certain length of ultra-high molecular weight polyethylene and immerse it in n-heptane for 24 hours to swell;

[0033] (2) Use acetone solution to wash it with ultrasonic vibration, the frequency of ultrasonic vibration is 100 Hz, the temperature is 25 ° C, the time is 20 minutes, and then it is dried in an oven at 30 ° C to constant weight;

[0034] (3) Preparation of cross-linking solution: the addition amount of cross-linking agent is 20% of the mass of acetone; the initiator includes photosensitizer and thermal initiator, and the total addition amount of the two is 2% of the mass of acetone. The ratio of the photosensitizer to the thermal initiator is photosensitizer:thermal initiator=1:4. The photosensitizer is benzophenone, and the thermal initiator is dicumyl peroxide.

[0035] (4) Pass nitrogen gas into the cross-linking solution for 10 minutes to fully catch oxygen, then soak the pretreated UHMWPE fiber in the cross-linking solution, and continue to...

Embodiment 3

[0038] (1) Take a certain length of ultra-high molecular weight polyethylene and immerse it in n-heptane for 18 hours to swell;

[0039] (2) Use acetone solution to wash it with ultrasonic vibration, the frequency of ultrasonic vibration is 50 Hz, the temperature is 30 ° C, the time is 15 minutes, and then it is dried in an oven at 25 ° C to constant weight;

[0040] (3) Preparation of cross-linking liquid: the amount of cross-linking agent added is 20% of the mass of acetone; the initiator includes photosensitizer and thermal initiator, and the total amount of the two added is 1% of the mass of acetone. The ratio of the photosensitizer to the thermal initiator is photosensitizer:thermal initiator=3:7. The photosensitizer is benzophenone, and the thermal initiator is dicumyl peroxide.

[0041] (4) Pass nitrogen into the cross-linking solution for 10 minutes to fully catch oxygen, then soak the pretreated UHMWPE fiber in the cross-linking solution, and continue to pass nitroge...

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Abstract

The invention relates to a method for improving the creep resistant performance of an ultra-high molecular weight polyethylene fiber; and the method is characterized by jointly triggering crosslinking by using a photosensitizer and a thermal initiating agent, thereby crosslinking points of the surface and interior of the ultra-high molecular weight polyethylene fiber are increased, the crosslinking efficiency of a cross-linking agent is improved, the relative slippage among molecules of the ultra-high molecular weight polyethylene fiber is effectively impeded and the creep resistant performance of the fiber is increased.

Description

[0001] technical field [0002] The invention relates to a method for improving ultra-high molecular weight polyethylene (UHMWPE) fibers, specifically a method for improving the creep resistance of UHMWPE fibers. Background technique [0003] Ultra-high molecular weight polyethylene fiber has mechanical properties unmatched by other high-performance fibers (see Table 1), which makes up for the shortcomings of high-performance carbon fibers and silicon carbide fibers with small fracture strains, so it is widely used in national defense military equipment, aerospace , marine engineering, sports and leisure products, communication optical cable reinforcement, special building materials and other fields. Due to the superior performance of UHMWPE fiber, countries all over the world have great interest and considerable attention to it. [0004] Table 1 Performance comparison between UHMWPE fiber and other fibers [0005] [0006] However, since polyethylene is a non-polar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/00D06M13/02D06M13/127C08J3/24D06M101/20
Inventor 赵国樑徐明忠贾清秀张天骄王晓春
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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