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Azobenzene polyether ester multi-block copolymer elastomer with photo-induced deformation performance and preparation method thereof

A multi-block copolymer, azobenzene polyetherester technology, applied in the direction of one-component polyetherester rayon, etc., can solve the problem of high requirements, low molecular weight of polyetherester, difficult to obtain high-performance polymers, etc. problem, achieve good photodeformation performance, and solve the effect of small photodeformation

Active Publication Date: 2018-08-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has high requirements for the purity of monomers, the ratio of acid and alcohol, catalysts, etc., the molecular weight of the synthesized polyether ester is low, and the obtained is a random copolymer, and it is difficult to obtain high-performance polymers.

Method used

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  • Azobenzene polyether ester multi-block copolymer elastomer with photo-induced deformation performance and preparation method thereof
  • Azobenzene polyether ester multi-block copolymer elastomer with photo-induced deformation performance and preparation method thereof
  • Azobenzene polyether ester multi-block copolymer elastomer with photo-induced deformation performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Preparation of azophenyl polyether ester multi-block copolymer PTMO-AZO-1-1

[0029] Equipped with mechanical stirring, N 2 Into a 100 mL three-neck round-bottomed flask for the catheter, add 5 grams (g) of cyclic oligopolyazophthalate triethylene glycol, 5 g of polytetrahydrofuran diol with a molecular weight of 2900, and pass through N 2 , heated to 240°C, adding n-butyl titanate as a catalyst, 2 Stirring was continued for 3 hours to obtain the final product PTMO-AZO-1-1 as a reddish-brown solid, figure 1 A schematic diagram of the reaction equation.

[0030] plotted by GPC ( figure 2 ) shows that the azophenyl polyether ester multi-block copolymer PTMO-AZO-1-1 with higher molecular weight was obtained.

Embodiment 2

[0031] Example 2 Preparation of azobenzene polyether ester multi-block copolymer PTMO-AZO-2-1

[0032] Equipped with mechanical stirring, N 2 Into a 100 mL three-necked round-bottomed flask with a catheter, add 3 g of cyclic oligopolyazophthalate triethylene glycol, 6 g of polytetrahydrofuran diol with a molecular weight of 2900, and pass N 2 , heated to 240°C, adding n-butyl titanate as a catalyst, 2 Stirring was continued for 3 hours under conditions to obtain the final product PTMO-AZO-2-1 as a reddish-brown solid.

Embodiment 3

[0033] Example 3 Preparation of azophenyl polyether ester multi-block copolymer PTMO-AZO-3-1

[0034] Equipped with mechanical stirring, N 2 Into a 100 mL three-necked round-bottomed flask with a catheter, add 2 g of cyclic oligopolyazophthalate triethylene glycol, 6 g of polytetrahydrofuran diol with a molecular weight of 2900, and pass N 2 , heated to 240°C, adding n-butyl titanate as a catalyst, 2 Stirring was continued for 3 hours under conditions to obtain the final product PTMO-AZO-3-1 as a reddish-brown solid.

[0035] Azophenyl polyether ester multi-block copolymers PTMO-AZO-1-1, PTMO-AZO-2-1, PTMO-AZO-3-1 with different soft and hard segment ratios were synthesized by controlling the feed ratio, molecular weight and molecular weight The distribution data are shown in Table 1, and the molecular weights are above 33,000.

[0036] Table 1 GPC molecular weight and molecular weight distribution of azobenzene polyether ester multi-block copolymer PTMO-AZO-1-1, PTMO-AZO-2...

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Abstract

The invention discloses azobenzene polyether ester multi-block copolymer elastomer with photo-induced deformation performance and a preparation method for high-strength super-tough fibers of the azobenzene polyether ester multi-bock copolymer elastomer. The preparation method comprises the following steps: adopting an open loop-condensation cascade polymerization method, leading an azobenzene group into a main chain of polyether ester multi-block copolymer, and combining photo-induced deformation performance of azobenzene with good elasticity of the polyether ester multi-block copolymer, thereby obtaining high-molecular-weight azobenzene polyether ester multi-block copolymer elastomer with photo-induced deformation performance, and fusion-spinning to prepare high-strength super-tough fibers with good mechanical properties.

Description

technical field [0001] The invention relates to the field of preparation of elastomers with photodeformation properties, in particular to a preparation method of azophenyl polyether ester multi-block copolymer elastomers with photodeformation properties and high-strength super-tough fibers. Background technique [0002] Azobenzene is a UV-responsive material, which has photoinduced cis-trans isomerism, that is, under ultraviolet light around 365 nanometers (nm), it can change from trans structure to cis structure. Upon irradiation, the cis structure converts back to the lower energy trans structure. Utilizing this property of azobenzene, materials with photodeformable properties can be prepared. Due to the good mechanical properties and processing properties of polymers, the introduction of azophenyl groups into polymers to prepare photoresponsive polymer materials has become a research hotspot. [0003] However, since the modification of azobenzene is difficult and becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C08G63/85D01F6/86
CPCC08G63/6856C08G63/85D01F6/86
Inventor 屠迎锋贺冲朱祥李志凯
Owner SUZHOU UNIV
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