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Degradable polyester/polyether block copolymer, polylactic acid degradable composite fiber and preparation method thereof

A technology of polyether block and degrading polyester is applied in the field of textile fibers, which can solve the problems of low impact resistance, poor heat resistance and high cost, and achieve the effects of good toughness and elasticity, low cost and good aging resistance.

Pending Publication Date: 2021-11-05
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a kind of degradable polyester / polyether block copolymer, polylactic acid degradable composite fiber and preparation method thereof, which can effectively solve the poor toughness existing in the existing polylactic acid composite fiber , poor heat resistance, low impact resistance and high cost

Method used

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  • Degradable polyester/polyether block copolymer, polylactic acid degradable composite fiber and preparation method thereof
  • Degradable polyester/polyether block copolymer, polylactic acid degradable composite fiber and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] In this example, 1 mol of terephthalic acid (TPA), 1.5 mol of 1,4-butanediol (BD) and 150 g of PEG polyether with a molecular weight of 1000 are used as the reaction raw materials, and 0.142 g of butyl titanate is added as a catalyst, and the esterification process is carried out directly at 210 ° C. The reaction was carried out for 3 hours. After the esterification was completed, the polycondensation reaction was carried out at 245°C in a vacuum state of 50 Pa. The reaction time was 6 hours to obtain a degradable polyester / polyether block copolymer. The mass ratio of the hard segment PBT / soft segment It was 52.4:47.6.

[0039] The above-mentioned degradable polyester / polyether block copolymer (core layer material) obtained by polymerization and commercially available PLA (skin layer material) slices are fully dried at 100°C; then the dried PLA and degradable polyester / polyether The polyether block copolymer raw materials are melted and extruded through a screw extruder...

Embodiment 2

[0042] In this example, 1mol of terephthalic acid (TPA), 1.5mol of 1,4 butanediol (BD) and 81g of polytetrahydrofuran ether glycol (PTMG) of 2500 molecular weight are used as reaction raw materials, and 0.192g of butyl titanate is added as a catalyst. The esterification reaction was carried out directly at 200°C for 4 hours. After the esterification, the polycondensation reaction was carried out at 250°C in a vacuum state of 100 Pa. The reaction time was 4 hours to obtain a degradable polyester / polyether block copolymer, in which the hard segment PBT / soft The mass ratio of chain segments is 71.4:28.6.

[0043] The above-mentioned degradable polyester / polyether block copolymer (core layer material) obtained by polymerization and commercially available PLA (skin layer material) slices were fully dried at 60°C; then the dried PLA and degradable polyester / polyether The polyether block copolymer raw materials are melted and extruded through a screw extruder, and the polylactic acid...

Embodiment 3

[0045] In this example, 1mol of terephthalic acid (TPA), 1.5mol of 1,4-butanediol (BD) and 61g of 500 molecular weight propylene oxide diol (PPG) are used as reaction raw materials, and 0.362g of butyl titanate is added as a catalyst. The esterification reaction was carried out directly at 230°C for 2 hours. After the esterification was completed, the polycondensation reaction was carried out at 235°C in a vacuum state of 10 Pa. The reaction time was 4 hours to obtain a degradable polyester / polyether block copolymer, in which the hard segment PBT / soft The mass ratio of chain segments is 71.4:28.6.

[0046] The above-mentioned degradable polyester / polyether block copolymer (core layer material) obtained by polymerization and commercially available PLA (skin layer material) slices were fully dried at 60°C; then the dried PLA and degradable polyester / polyether The polyether block copolymer raw materials are melted and extruded through a screw extruder, and the polylactic acid wit...

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Abstract

The invention discloses a degradable polyester / polyether block copolymer, a polylactic acid degradable composite fiber and a preparation method of the polylactic acid degradable composite fiber, and belongs to the technical field of textile fibers.The polylactic acid degradable composite fiber is of a skin-core structure, and the skin layer material of the skin-core structure is polylactic acid; the core layer material of the skin-core structure is the degradable polyester / polyether block copolymer; the performance of the PLA fiber is improved, and the cost can be reduced; compared with a pure PLA fiber, the polylactic acid degradable composite fiber with the skin-core structure has better mechanical properties, and the problems of poor hand feeling, elasticity, toughness and the like of the PLA fiber are effectively solved.

Description

technical field [0001] The invention relates to the technical field of textile fibers, in particular to a degradable polyester / polyether block copolymer, a polylactic acid degradable composite fiber and a preparation method thereof. Background technique [0002] Composite fibers are composed of two or more polymers or the same polymer with different properties in a certain way. According to the cross-section and longitudinal arrangement, the composite fiber can be divided into skin-core type, side-by-side type, sea-island type and other composite fibers. The sheath-core composite fiber refers to a composite fiber formed by continuously arranging two components along the fiber axis in the form of a sheath-core structure. As a kind of composite fiber, the skin-core structural fiber has the unique properties of the two components, which can make up for the shortcomings of a single component; further, its special skin-core structure can produce a certain combination effect, thu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/85D01F8/14
CPCC08G63/672C08G63/85D01F8/14
Inventor 兰建武林绍建尚娇娇
Owner SICHUAN UNIV
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