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Polymer Bulletin

, Volume 75, Issue 9, pp 4019–4036 | Cite as

Microphase separation and thermo-mechanical properties of energetic poly(urethane–urea)

  • Jie Lv
  • Jizhen Huo
  • Ye Yang
  • Yingfeng Yu
  • Guozhu Zhan
  • Huikun Zhang
Original Paper

Abstract

In this paper, the phase segregation and thermo-mechanical properties of energetic poly(urethane–urea) (EPUU) for propellant binder application are analyzed. Series of EPUUs are synthesized from copolymer of 3,3-bis-azido methyl oxetane and tetrahydrofuran, tolylene diisocyanate, and 3,3′-dichloro-4,4′-dianilino methane, with different hard segment contents ranging from 9.7 to 38%. With the enlargement of hard segment content from 9.7 to 28.9% (EPUU1–EPUU3), the percentage of ordered part via hydrogen-bonded C=O in urea increases as investigated by FTIR, further increase of hard segment content to 38% results in less hydrogen-bonded ordered part but more disordered part. The SAXS result also verifies the highest degree of phase segregation of EPUU3. The thermo-mechanical properties of energetic poly(urethane–urea) are related to the degree of microphase separation. With the increase of hard segment content, the tensile strength increases roughly, while the elongation at break drops from EPUU1 to EPUU4. EPUU3 exhibits the highest value of tensile strength and acceptable elongation at break.

Keywords

Energetic Poly(urethane–urea) Microphase separation Mechanical property 

Notes

Acknowledgements

This research work was supported by the SAST Foundation No. 2015101.

Supplementary material

289_2017_2251_MOESM1_ESM.docx (61 kb)
Supplementary material 1 (DOCX 61 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular ScienceFudan UniversityShanghaiChina
  2. 2.The 806th Institute of the Eighth Academy of CASCHuzhouChina

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