Polyurethane Incorporating Oxidatively Degradable Diacylhydrazine Moiety: Synthesis, Characterization, and Thermal Analysis

Authors

  • Md Shahin Hossen Department of Chemistry, University of Barishal, Barishal-5254, Bangladesh
  • Md Byzed Hasan Department of Chemistry, Pabna University of Science and Technology, Pabna-6600, Bangladesh
  • Md Foysal Ahmed Department of Chemistry, University of Barishal, Barishal-5254, Bangladesh
  • Md Masud Parvez Department of Chemistry, University of Barishal, Barishal-5254, Bangladesh

DOI:

https://doi.org/10.3329/dujs.v74i1.84349

Keywords:

Oxidative degradation, Diacylhydrazine, Polyurethane, TGA-DTA, Diisocyanates.

Abstract

Oxidatively degradable and thermally stable polyurethanes incorporating diacylhydrazine moieties were synthesized via solution polymerization of 4-hydroxy-N'-(4-hydroxybenzoyl)benzohydrazide with hexamethylene diisocyanate and toluene-2,4-diisosyanate. Structural characterization by NMR and IR confirmed the successful incorporation of diacylhydrazine and carbamate groups. TGA-DTA analysis revealed multistep thermal degradation with high stability. The polymers exhibited rapid oxidative degradation in 10% sodium hypochlorite, yielding carboxylic acids. Strong intermolecular hydrogen bonding rendered them insoluble in most organic solvents but soluble in highly polar media such as NMP and concentrated H2SO4. This study presents a versatile strategy for designing polyurethanes with both thermal robustness and controlled oxidative degradability.

Dhaka Univ. J. Sci. 74(1): 186-191, 2026 (January)

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Author Biographies

Md Shahin Hossen, Department of Chemistry, University of Barishal, Barishal-5254, Bangladesh

 

 

Md Byzed Hasan, Department of Chemistry, Pabna University of Science and Technology, Pabna-6600, Bangladesh

 

 

Md Foysal Ahmed, Department of Chemistry, University of Barishal, Barishal-5254, Bangladesh

 

 

Md Masud Parvez, Department of Chemistry, University of Barishal, Barishal-5254, Bangladesh

 

 

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Published

2026-01-28

How to Cite

Hossen, M. S., Hasan, M. B., Ahmed, M. F., & Parvez, M. M. (2026). Polyurethane Incorporating Oxidatively Degradable Diacylhydrazine Moiety: Synthesis, Characterization, and Thermal Analysis. Dhaka University Journal of Science, 74(1), 186–191. https://doi.org/10.3329/dujs.v74i1.84349

Issue

Vol. 74 No. 1 (2026)

Section

Articles