Investigation on Viscoelasticity of Waterborne Polyurethane with Azobenzene-containing Pendant Groups under Ultraviolet and Visible-light Irradiation

Yi-Jun Liu; Dong Liu; Si-Han Li; Hua-Qing Liang; Fang-Ming Zhu

doi:10.1007/s10118-019-2289-x

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Investigation on Viscoelasticity of Waterborne Polyurethane with Azobenzene-containing Pendant Groups under Ultraviolet and Visible-light Irradiation

ARTICLE | Updated：2021-02-18

- Investigation on Viscoelasticity of Waterborne Polyurethane with Azobenzene-containing Pendant Groups under Ultraviolet and Visible-light Irradiation
- Chinese Journal of Polymer Science Vol. 37, Issue 12, Pages: 1267-1272(2019)
- Affiliations：
  
  a.GDHPPC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
  b.Key Lab for Polymer Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
- Author bio：
  
  ceszfm@mail.sysu.edu.cn
- Funds：
- DOI：10.1007/s10118-019-2289-x
  CLC：
- Received：06 April 2019，
  
  Revised：2019-4-28，
  
  Accepted：06 May 2019，
  
  Online First：26 June 2019，
  
  Published：2019-12
- Accepted：
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Liu, Y. J.; Liu, D.; Li, S. H.; Liang, H. Q.; Zhu, F. M. Investigation on viscoelasticity of waterborne polyurethane with azobenzene-containing pendant groups under ultraviolet and visible-light irradiation. Chinese J. Polym. Sci. 2019, 37, 1267–1272.

Yi-Jun Liu, Dong Liu, Si-Han Li, et al. Investigation on Viscoelasticity of Waterborne Polyurethane with Azobenzene-containing Pendant Groups under Ultraviolet and Visible-light Irradiation[J]. Chinese Journal of Polymer Science, 2019, 37(12): 1267-1272.
Liu, Y. J.; Liu, D.; Li, S. H.; Liang, H. Q.; Zhu, F. M. Investigation on viscoelasticity of waterborne polyurethane with azobenzene-containing pendant groups under ultraviolet and visible-light irradiation. Chinese J. Polym. Sci. 2019, 37, 1267–1272. DOI： 10.1007/s10118-019-2289-x.

Yi-Jun Liu, Dong Liu, Si-Han Li, et al. Investigation on Viscoelasticity of Waterborne Polyurethane with Azobenzene-containing Pendant Groups under Ultraviolet and Visible-light Irradiation[J]. Chinese Journal of Polymer Science, 2019, 37(12): 1267-1272. DOI： 10.1007/s10118-019-2289-x.

摘要

Abstract

In this study

a novel waterborne polyurethane (WPU) with azobenzene-containing (azo-containing) pendant groups was synthesized by isophorone diisocyanate

long-chain diol of polycaprolactone

2-ethyl-2-methyl-butanoic acid (2

2-dimethylolpropionic acid)

10-(4-(phenyldiazenyl)phenoxy)decyl-3-hydroxy-2-(hydroxymethyl)-2-methylpropanoate

and

-diethyl-ethanamine (triethylamine). Moreover

the influence of ultraviolet and visible (UV-Vis) light irradiation on the viscoelasticity of azo-containing WPU film in terms of the reversible

trans

cis

photoisomerization of azo-containing pendant groups was investigated by UV-Vis light spectroscopy

atomic force microscopy

and dynamic thermomechanical analysis. The results revealed that the adhesion of azo-containing WPU with single crystal silicon atomic force microscope probe was about 13 nN when irradiated by 450 nm Vis light for 60 s at 25 °C. Subsequently

the adhesion increased to 82 nN after irradiation with 365 nm UV light for 60 s at 25 °C. In addition

the azo-containing WPU presented a photo-induced reversible transition of tensile modulus and tan

in the range from about 2 MPa to 22 MPa and 6000 to 0.35 with UV-Vis light cyclic irradiation for 120 s at 25 °C

respectively.

关键词

Keywords

references

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