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Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper
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Published on: February 27, 2021

XRD studies of chitin-based polyurethane elastomers.

Khalid Mahmood Zia1, Ijaz Ahmad Bhatti, Mehdi Barikani

  • 1Department of Chemistry, University of Agriculture, Faisalabad 38040, Pakistan. ziakmpk@yahoo.com

International Journal of Biological Macromolecules
|May 23, 2008
PubMed
Summary
This summary is machine-generated.

Chitin-based polyurethane elastomers were synthesized, showing that chitin incorporation enhances polymer crystallinity and ordered structure compared to traditional extenders. This chitin modification offers a pathway to novel biomaterials.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Biomaterials

Background:

  • Polyurethane elastomers (PUEs) are versatile polymers with applications in various industries.
  • Chitin, a natural biopolymer, offers potential for creating sustainable and functional materials.
  • Modifying PUEs with chitin can lead to enhanced material properties and novel applications.

Purpose of the Study:

  • To synthesize chitin-based polyurethane elastomers (PUEs) using varying diisocyanate and chain extender structures.
  • To investigate the structural, crystalline, and thermal properties of the synthesized chitin-based PUEs.
  • To compare the properties of chitin-extended PUEs with those extended using a conventional chain extender (1,4-butane diol).

Main Methods:

  • Step-growth polymerization techniques were employed for PUE synthesis.
  • Spectroscopic methods (FTIR, 1H NMR, 13C NMR) were used for structural characterization.
  • Crystallinity and thermal properties were analyzed using X-ray diffraction (XRD), differential scanning calorimetry (DSC), and loss tangent curves.

Main Results:

  • The successful synthesis of chitin-based PUEs was confirmed by spectroscopic analysis.
  • Chitin incorporation and the nature of diisocyanates significantly influenced the crystallinity of the PUEs.
  • PUEs extended with chitin exhibited higher crystallinity and ordered structures compared to those extended with 1,4-butane diol, indicated by higher peak intensities and enthalpy values.

Conclusions:

  • Chitin-based PUEs can be effectively synthesized, offering a promising route for developing advanced biomaterials.
  • The presence of chitin enhances the crystalline behavior and structural order of polyurethane elastomers.
  • These findings suggest that chitin is a valuable component for tailoring the properties of PUEs for specific applications.