Effect of Fluorocarbon Side Chain on the Microphase Morphology and Rheological Behavior of Thermoplastic Polyurethanes

Ao Wang; Shu-Ren Shao; He-Cheng Wu; Chen-Xu Tian; Feng Luo; Jie-Hua Li; Zhen Li; Hong Tan

doi:10.1007/s10118-022-2865-3

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Effect of Fluorocarbon Side Chain on the Microphase Morphology and Rheological Behavior of Thermoplastic Polyurethanes

RESEARCH ARTICLE | Updated：2023-05-26

- Effect of Fluorocarbon Side Chain on the Microphase Morphology and Rheological Behavior of Thermoplastic Polyurethanes
- Chinese Journal of Polymer Science Vol. 41, Issue 6, Pages: 933-941(2023)
- Affiliations：
  
  College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
- Author bio：
  
  zhenli@scu.edu.cn (Z.L.)
  hongtan@scu.edu.cn (H.T.)
- Funds：
- DOI：10.1007/s10118-022-2865-3
  CLC：
- Received：16 August 2022，
  
  Revised：2022-8-27，
  
  Accepted：06 September 2022，
  
  Online First：20 October 2022，
  
  Published：01 June 2023
- Accepted：
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Wang, A.; Shao, S. R.; Wu, H. C.; Tian, C. X.; Luo, F.; Li, J. H.; Li, Z.; Tan, H. Effect of fluorocarbon side chain on the microphase morphology and rheological behavior of thermoplastic polyurethanes. Chinese J. Polym. Sci. 2023, 41, 933–941

Ao Wang, Shu-Ren Shao, He-Cheng Wu, et al. Effect of Fluorocarbon Side Chain on the Microphase Morphology and Rheological Behavior of Thermoplastic Polyurethanes[J]. Chinese Journal of Polymer Science, 2023, 41(6): 933-941.
Wang, A.; Shao, S. R.; Wu, H. C.; Tian, C. X.; Luo, F.; Li, J. H.; Li, Z.; Tan, H. Effect of fluorocarbon side chain on the microphase morphology and rheological behavior of thermoplastic polyurethanes. Chinese J. Polym. Sci. 2023, 41, 933–941 DOI： 10.1007/s10118-022-2865-3.

Ao Wang, Shu-Ren Shao, He-Cheng Wu, et al. Effect of Fluorocarbon Side Chain on the Microphase Morphology and Rheological Behavior of Thermoplastic Polyurethanes[J]. Chinese Journal of Polymer Science, 2023, 41(6): 933-941. DOI： 10.1007/s10118-022-2865-3.

摘要

The introduction of FDO destroyed the hydrogen bond between hard segment and contributed to the formation of loose packed hard domain which can be utilized as internal plasticizer.

Abstract

Fluorinated diols (FDO) with dangling chain were introduced into polyether urethanes (PEUs) as chain extender in order to achieve internal plasticization. Based on temperature dependent Fourier transform infrared (FTIR) spectroscopy results

the fluorinated polyether urethanes (FPEUs) exhibited weaker hydrogen bonding between C＝O and N―H groups with addition of FDO. The crystallinity of hard domain was destroyed determined by thermal analysis. Combined with the results of dynamic mechanical analysis (DMA) and dissipative particle dynamics (DPD) simulation

it was proved that more loosely aggregated hard domains with weakened interaction separated from soft segment were formed. Rheological analysis indicated that FDO reduced the complex viscosity and viscous flow activation energy which endowed the polymer with more flexibility. Despite the loss of hydrogen bonds

there was no significant decline in mechanical property resulting from the decrease of hard segment dissolved in soft segment phase. The presence of fluorinated carbon side chain could function as internal plasticizer and contribute to the processability of polyurethane.

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