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PBAT fiber and preparation method thereof

A fiber and chain segment technology, applied in the field of polymer fiber preparation, can solve problems such as adhesion, inability to solve fibers, and change polymer crystallization properties, so as to speed up crystallization speed, avoid style changes, and improve dyeing performance.

Active Publication Date: 2021-07-16
XINJIANG BLUE RIDGE TUNHE CHEM IND JOINTSTOCK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent "A PBAT material with fast crystallization speed and its preparation method" (201810122762.7) provides a PBAT material with fast crystallization speed and its preparation method, which is obtained by adding a nucleating agent dimethylene phenyl dialkyl However, this method does not change the crystallization properties of the polymer itself, does not help to improve the crystallinity of the polymer, and still cannot solve the problem of fiber adhesion during processing and use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A preparation method of PBAT fiber, the steps are as follows:

[0053] (1) Esterification of terephthalic acid: Mix terephthalic acid, butanediol, catalyst I (tetrabutyl titanate) and antioxidant I (triphenyl phosphate) in a certain proportion and then carry out esterification The reaction obtains a terephthalic acid ester compound with a degree of polymerization of 2;

[0054] The amount of catalyst I added is 5ppm relative to terephthalic acid; the amount of antioxidant I added is 100ppm relative to terephthalic acid; the molar ratio of terephthalic acid and butanediol is 1:1.1;

[0055] The temperature of the esterification reaction is 180 ° C, the absolute pressure is 100 Pa, and the esterification time is 300 minutes; when the water output is equal to 98% of the theoretical water output, the esterification is considered to be completed;

[0056] (2) Esterification of adipic acid: Mix adipic acid, butanediol, catalyst II (tetrabutyl titanate) and antioxidant II (tr...

Embodiment 2

[0072] A preparation method of PBAT fiber, the steps are as follows:

[0073] (1) Esterification of terephthalic acid: Mix terephthalic acid, butanediol, catalyst I (tetrabutyl titanate) and antioxidant I (triphenyl phosphate) in a certain proportion and then carry out esterification The reaction obtains a terephthalic acid ester compound with a degree of polymerization of 4;

[0074] The amount of catalyst I added is 10ppm relative to terephthalic acid; the amount of antioxidant I added is 150ppm relative to terephthalic acid; the molar ratio of terephthalic acid and butanediol is 1:1.1;

[0075] The temperature of the esterification reaction is 190 ° C, the absolute pressure is 0.1 MPa, and the esterification time is 250 minutes; when the water output is equal to 98% of the theoretical water output, the esterification is considered to be completed;

[0076] (2) Esterification of adipic acid: Mix adipic acid, butanediol, catalyst II (tetrabutyl titanate) and antioxidant II (...

Embodiment 3

[0092] A preparation method of PBAT fiber, the steps are as follows:

[0093] (1) Esterification of terephthalic acid: Mix terephthalic acid, butanediol, catalyst I (tetrabutyl titanate) and antioxidant I (antioxidant 300) in a certain proportion and perform esterification The reaction obtains a terephthalic acid ester compound with a degree of polymerization of 6;

[0094] The amount of catalyst I added is 20ppm relative to terephthalic acid; the amount of antioxidant I added is 200ppm relative to terephthalic acid; the molar ratio of terephthalic acid and butanediol is 1:1.2;

[0095] The temperature of the esterification reaction is 200 ° C, the absolute pressure is 0.2 MPa, and the esterification time is 200 minutes; when the water output is equal to 98% of the theoretical water output, the esterification is considered to be completed;

[0096] (2) Esterification of adipic acid: Mix adipic acid, butanediol, catalyst II (tetrabutyl titanate) and antioxidant II (antioxidant...

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Abstract

The invention relates to a PBAT fiber and a preparation method. Molecular chain segments of the PBAT fiber comprise a butylene terephthalate chain segment, a butylene adipate chain segment and an isophthalic acid-5-sodium sulfoisophthalic acid butanediol ester chain segment, the molar content of the butylene adipate chain segment is 50%-150% relative to the molar content of the butylene terephthalate chain segment, and the molar content of the isophthalic acid-5-sodium sulfoisophthalic acid butanediol ester chain segment is 0.5%-4% relative to the molar content of the terephthalic acid butanediol ester chain segment; and the breaking strength of the PBAT fiber is 2.0-5.5 cN / dtex, the elongation at break is 15%-60%, and the AA rate is greater than or equal to 98%. The preparation method comprises the following steps that terephthalic acid and adipic acid are correspondingly esterified and then subjected to pre-polycondensation, then two prepolymers are mixed, an isophthalic acid-5-sodium sulfonate ester is added, then final polycondensation is carried out, and finally the PBAT fiber is prepared by a melt spinning method. According to the PBAT fiber, the balance relation between the crystallization capacity and the performance of PBAT is regulated and controlled through the length of the chain segment, and the performance of the fiber is improved by introducing SSIPA into the chain segment.

Description

technical field [0001] The invention belongs to the technical field of polymer fiber preparation, and relates to a PBAT fiber and a preparation method. Background technique [0002] Poly(butylene adipate-butylene terephthalate) (PBAT), as an emerging biodegradable copolyester, is mainly based on 1,4-butanediol (BDO), hexylene Diacid (AA) and terephthalic acid (PTA) are prepared as raw materials. PBAT not only has the good thermal stability and mechanical properties of PBT polyester, but also has the good stretchability and ductility of aliphatic polyester, and can be degraded into water and carbon dioxide under natural conditions. PBAT can be used in fields such as packaging, medical and agricultural films. [0003] As a degradable plastic with excellent performance, PBAT can also be used in the field of textile and clothing. However, at present, PBAT is mainly produced by direct esterification or transesterification. The obtained high polymer is a random copolymer with l...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/688
CPCD01F6/84C08G63/6886
Inventor 丁建萍王华平翟春军吉鹏黎万丽张志峰刘博
Owner XINJIANG BLUE RIDGE TUNHE CHEM IND JOINTSTOCK
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