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Spinning solution, heat-resistant creep-resistant fiber and preparation method of heat-resistant creep-resistant fiber

A spinning dope, anti-creep technology, applied in spinning solution preparation, dry spinning, fiber processing, etc., can solve the problems of poor heat resistance, poor dimensional stability, easy creep of polyethylene fibers, etc. Long life, high stability, low density effect

Pending Publication Date: 2022-08-05
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of easy creep of polyethylene fibers, poor dimensional stability and poor heat resistance in the prior art, the invention provides a spinning stock solution, heat-resistant and creep-resistant fibers and a preparation method thereof; One is to provide a polyethylene spinning stock solution; the second object of the present invention is to provide a high-performance polyethylene fiber with high gel content and high crystallinity, thus excellent creep resistance and heat resistance; The third purpose of the invention is to provide a low-cost and high-efficiency preparation method suitable for large-scale and continuous production of the fiber

Method used

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  • Spinning solution, heat-resistant creep-resistant fiber and preparation method of heat-resistant creep-resistant fiber
  • Spinning solution, heat-resistant creep-resistant fiber and preparation method of heat-resistant creep-resistant fiber
  • Spinning solution, heat-resistant creep-resistant fiber and preparation method of heat-resistant creep-resistant fiber

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0050] A preparation method of a photoinitiator, the concrete steps are:

[0051] (1) put azobisisobutyronitrile, xylene, 4-acryloyloxybenzophenone into the three-necked flask, carry out the polymerization reaction under argon, the reaction temperature is 60 ℃, and the reaction time is 2 hours; wherein , the content of azobisisobutyronitrile is 10wt% of the total mass of 4-acryloyloxybenzophenone; the ratio of moles of 4-acryloyloxybenzophenone to the volume of xylene is 1mol:1L ;

[0052] (2) adopting the method of vacuum distillation to remove unreacted monomers and solvent, carry out vacuum drying, drying temperature 60°C, drying time 12h, to obtain photoinitiator I; wherein, the process conditions of vacuum distillation are: at 80°C Condition, gradually reduce the pressure to boiling until the solvent is completely evaporated. The structural formula of the obtained photoinitiator I is:

[0053]

[0054] where x is an integer, R 0 is a hydrogen atom; its number-avera...

preparation example 2

[0056] A preparation method of a photoinitiator, the concrete steps are:

[0057] (1) azobisisobutyronitrile, xylene, 4-acryloyloxybenzophenone, and acrylic acid are subjected to a copolymerization reaction under argon, the reaction temperature is 65° C., and the reaction time is 3 hours; wherein, The content of azobisisobutyronitrile is 2wt% of the total mass of 4-acryloyloxybenzophenone; the mole number of 4-acryloyloxybenzophenone is X, and the mole number of acrylic acid is Y, wherein, The relationship between X and Y is: X:(X+Y)=0.05; The ratio of the total moles of 4-acryloyloxybenzophenone and acrylic acid to the volume of xylene is 2mol:1L;

[0058](2) adopting the method of vacuum distillation to remove unreacted monomers and solvent, carry out vacuum drying, drying temperature is 60°C, drying time is 12h, to obtain photoinitiator I; wherein, the process conditions of vacuum distillation are: at 40°C Condition, gradually reduce the pressure to boiling until the solve...

preparation example 3

[0063] A preparation method of a photoinitiator, the concrete steps are:

[0064] (1) azobisisobutyronitrile, xylene, 4-acryloyloxybenzophenone, and styrene are subjected to a copolymerization reaction under argon, the reaction temperature is 70° C., and the reaction time is 4 hours; wherein , the content of azobisisobutyronitrile is 0.05wt% of the total mass of 4-acryloyloxybenzophenone; the mole number of 4-acryloyloxybenzophenone is X, and the mole number of styrene is Y , wherein the relationship between X and Y is: X:(X+Y)=0.3; the ratio of the total moles of 4-acryloyloxybenzophenone and styrene to the volume of xylene is 2mol:1L;

[0065] (2) adopting the method of vacuum distillation to remove unreacted monomers and solvent, carry out vacuum drying, drying temperature is 60°C, drying time is 12h, to obtain photoinitiator I; wherein, the process conditions of vacuum distillation are: at 40°C Condition, gradually reduce the pressure to boiling until the solvent is compl...

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Abstract

The invention relates to a spinning solution, a heat-resistant creep-resistant fiber and a preparation method of the heat-resistant creep-resistant fiber, the spinning solution comprises polyethylene, a solvent and a photoinitiator, and the content of the photoinitiator is 0.2 wt%-10wt% of the mass of the polyethylene; performing gel spinning and multi-stage drafting on the spinning solution to obtain polyethylene fibers; performing ultraviolet light irradiation through an ultraviolet light source to obtain the heat-resistant creep-resistant polyethylene fiber. Wherein the light intensity of the ultraviolet light source is 100 mW / cm < 2 > to 5000 mW / cm < 2 >, and the ultraviolet light irradiation time is 10 seconds to 600 seconds; the gel content of the heat-resistant creep-resistant polyethylene fiber is 20 wt%-100 wt%, and the crystallinity of the heat-resistant creep-resistant polyethylene fiber is 50 wt%-90 wt%; under the conditions that the temperature is 70 DEG C and the load is 300MPa, the creep rate of the fiber is 10 <-8 > s <-1 > to 10 <-7 > s <-1 >; the fracture temperature of the fiber is 155-245 DEG C under the conditions that the load is 15MPa and the heating rate is 2 DEG C / min. The method is simple and easy to implement and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of chemical fibers, and relates to a spinning dope, a heat-resistant and creep-resistant fiber and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber is currently the fiber with the highest specific strength and specific modulus in the world. It is a fiber spun from polyethylene with a molecular weight of more than 1 million. There are two different production technology routes for its production. : One is a dry gel spinning process route with high volatility solvent (decalin, toluene, etc.), referred to as dry route; the other is a wet process with low volatility solvent (mineral oil, white oil, etc.) Gel spinning process route, referred to as wet route. UHMWPE fiber has good impact resistance and high specific energy absorption, and can be made into bulletproof vests, bulletproof helmets, bulletproof panels (such as armored panels for helico...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10D06M10/00D01D1/02D01D5/40
CPCD01F6/46D01F1/10D06M10/001D01D1/02D01D5/40D01D5/04Y02P20/54D01D10/00D01D5/06Y02P70/62D01F11/04D06M2101/20D06M2200/30
Inventor 何勇郭子贤郭俊谷郭亚东王新鹏项朝阳王依民倪建华
Owner DONGHUA UNIV
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