Effect of Chain Extender on Hydrogen Bond and Microphase Structure of Biodegradable Thermoplastic Polyurethanes

Wen-Kai Liu; Yun Zhao; Rong Wang; Feng Luo; Jian-Shu Li; Jie-Hua Li; Hong Tan

doi:10.1007/s10118-018-2020-3

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Effect of Chain Extender on Hydrogen Bond and Microphase Structure of Biodegradable Thermoplastic Polyurethanes

Articles | Updated：2021-02-18

- Effect of Chain Extender on Hydrogen Bond and Microphase Structure of Biodegradable Thermoplastic Polyurethanes
- Chinese Journal of Polymer Science Vol. 36, Issue 4, Pages: 514-520(2018)
- Affiliations：
  
  College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
- Author bio：
  
  E-mail jiehua_li@scu.edu.cn (J.H.L)
  E-mail hongtan@scu.edu.cn (H.T.)
- Funds：
- DOI：10.1007/s10118-018-2020-3
  CLC：
- Received：19 June 2017，
  
  Accepted：11 August 2017，
  
  Online First：01 November 2017，
  
  Published：05 April 2018
- Accepted：
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Wen-Kai Liu, Yun Zhao, Rong Wang, et al. Effect of Chain Extender on Hydrogen Bond and Microphase Structure of Biodegradable Thermoplastic Polyurethanes[J]. Chinese Journal of Polymer Science, 2018, 36(4): 514-520.
DOI：

Wen-Kai Liu, Yun Zhao, Rong Wang, et al. Effect of Chain Extender on Hydrogen Bond and Microphase Structure of Biodegradable Thermoplastic Polyurethanes[J]. Chinese Journal of Polymer Science, 2018, 36(4): 514-520. DOI： 10.1007/s10118-018-2020-3.

摘要

Abstract

Thermomechanical properties of polyurethanes (PUs) strongly depend on the molecular interactions and microphase structure. In this work

two chain extenders with different ratios

flexile 1

4-butanediol (BDO) and branched trimethylolpropane mono allyl ether (TMPAE)

are used to tune the molecular interactions and microphase structures of a series of biodegradable thermoplastic polyurethanes (TPUs). In TPUs

the biodegradable polycaprolactone (PCL

of 2000) is used as soft segment while 1

6-diisocyanatohexane (HDI) and chain extenders are used as hard segment. Fourier transform infrared spectroscopy (FTIR)

proton nuclear magnetic resonance spectroscppy (

H-NMR)

gel permeation chromatography (GPC)

differential scanning calorimetry (DSC)

dynamic mechanical analysis (DMA) and mechanical tests were performed to characterize the bulk structure and properties of TPUs. Compared with BDO

the steric bulk of TMPAE is larger. The increment of TMPAE can help to increase the hydrogen bond content

microphase separation

and the elastic modulus ratio (

)

which would strongly affect the thermomechanical property of the TPUs. The results of this work verify the importance of the structure of chain extender on the properties of TPUs. It provides valuable information for further understanding the structure-property relationships of these polyurethanes.

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Keywords

references

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