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Method for preparing nano TiO2 polyester ether elastic fiber

A technology of polyether ester elastomer and elastic fiber, which is applied in the field of preparation of nano-TiO2 polyether ester elastic fiber, to achieve the effects of stable chemical properties, uniform fiber size, and simple process

Inactive Publication Date: 2009-07-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are all attempts to improve the elastic recovery rate by strengthening the physical crosslinking of the hard segment, but they have not solved the problems in their application well.

Method used

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  • Method for preparing nano TiO2 polyester ether elastic fiber
  • Method for preparing nano TiO2 polyester ether elastic fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using dimethyl terephthalate (DMT), polytetrahydrofuran ether glycol (PTMO), and 1,4-butanediol (BD) as raw materials, adding nano-TiO with a mass fraction of 0.3% 2 Participate in copolymerization, first vacuumize at 100°C to remove water, then raise the temperature to 200°C for transesterification reaction, the transesterification reaction is considered to be complete when the amount of methanol distilled is about 90% of the theoretical amount; raise the temperature to about 250°C, First remove small liquid molecules under low vacuum conditions, then conduct polycondensation reaction for 3 hours while ensuring that the vacuum degree is less than 80Pa, and finally discharge under nitrogen protection to obtain polyether ester elastomers;

[0030] The above polyether ester elastomer was melt spun at a spinning speed of 1000 m / min to obtain polyether ester elastic fibers. Its elastic recovery rate is more than 97% (100% constant elongation) and more than 84% (300% constan...

Embodiment 2

[0032] Using dimethyl terephthalate (DMT), polytetrahydrofuran ether glycol (PTMO), and 1,4-butanediol (BD) as raw materials, adding nano-TiO with a mass fraction of 0.5% 2 Participate in copolymerization, first vacuumize at 100°C to remove water, then raise the temperature to 200°C for transesterification reaction, the transesterification reaction is considered to be complete when the amount of methanol distilled is about 90% of the theoretical amount; raise the temperature to about 250°C, First remove small liquid molecules under low vacuum conditions, then polycondense for 3.5 hours under the condition of ensuring that the vacuum degree is less than 80Pa, and finally discharge under nitrogen protection to obtain polyether ester elastomers;

[0033] The above polyether ester elastomer was melt spun at a spinning speed of 800 m / min to obtain polyether ester elastic fibers. Its elastic recovery rate is more than 97% (100% constant elongation) and more than 86% (300% constant e...

Embodiment 3

[0035] Using dimethyl terephthalate (DMT), polytetrahydrofuran ether glycol (PTMO), and 1,4-butanediol (BD) as raw materials, adding nano-TiO with a mass fraction of 1.0% 2Participate in copolymerization, first vacuumize at 100°C to remove water, then raise the temperature to 200°C for transesterification reaction, the transesterification reaction is considered to be complete when the amount of methanol distilled is about 90% of the theoretical amount; raise the temperature to about 250°C, First remove small liquid molecules under low vacuum conditions, then polycondense for 4 hours under the condition that the vacuum degree is guaranteed to be less than 80Pa, and finally discharge under nitrogen protection to obtain polyether ester elastomers;

[0036] The above polyether ester elastomer was melt spun at a spinning speed of 1000 m / min to obtain polyether ester elastic fibers. Its elastic recovery rate is more than 97% (100% constant elongation) and more than 88% (300% constan...

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Abstract

The invention relates to nanometer TiO2 polyether ester elastic fiber manufacturing method. It includes the following steps: preparing nanometer TiO2 / 1, 4-butanediol system that replacing the nanometer TiO2 by 1,4-butanediol as dispersion medium and vacuum pumping at 70-80 deg.C; preparing polyether ester elastic body that using dimethyl terephthalate, polytetrahydrofuran ether glycol, 1, 4-butanediol as material, adding 0.1-2.0% mass fraction nanometer TiO2, vacuum pumping at 50-100 deg.C, ester interchange reacting at 180-200 deg.C, condensation polymer reacting for 3-4h at 230-250 deg.C under 80Pa; melt spinning. This technology is simple. In addition, the prepared fiber has even nanometer particle disperse, good elastic recovery, low cost, suits for industrialization production.

Description

technical field [0001] The invention relates to the field of improving the preparation of polyether ester elastic fibers, in particular to a nano-TiO 2 The preparation method of polyether ester elastic fiber. Background technique [0002] Thermoplastic polyetherester elastomer (TPEE) is a new type of crystalline thermoplastic elastomer after styrene-butadiene-styrene (S-B-S) thermoplastic elastomer. It is a block polymer, and its macromolecular chain It consists of hard segment and soft segment. Its hard segment is crystalline aromatic polyester, and its soft segment is amorphous aliphatic polyether or polyester. This linear multi-block copolymer has a micro-phase separation structure, and the crystalline phase micro-domain composed of hard segment polyester acts as a physical cross-link, binding and dispersing the soft segment polyether or polyester molecules. In the amorphous phase composed of soft segments. Since crosslinking relies on the physical action of the cryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/86D01F1/10D01D5/08
Inventor 李光宋晓芳金俊弘王嫄江建明
Owner DONGHUA UNIV
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