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Related Concept Videos

Classification and Mechanical Properties of Synthetic Polymers01:28

Classification and Mechanical Properties of Synthetic Polymers

Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...

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Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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Published on: March 8, 2019

Highly stretchable nanoalginate based polyurethane elastomers.

Hamed Daemi1, Mehdi Barikani, Mohammad Barmar

  • 1Department of Polyurethane and Nanopolymers, Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Islamic Republic of Iran.

Carbohydrate Polymers
|May 8, 2013
PubMed
Summary
This summary is machine-generated.

New cationic polyurethane dispersions-sodium alginate nanoparticles (CPUD/SA) create highly stretchable thermoplastic-elastomers. These advanced nanocomposites exhibit enhanced thermal properties and excellent compatibility, paving the way for innovative material applications.

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Published on: October 26, 2016

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Developing advanced elastomeric materials with enhanced properties is crucial for various industrial applications.
  • Cationic polyurethane dispersions (CPUDs) offer unique properties for material synthesis.
  • Sodium alginate (SA) nanoparticles present opportunities for creating novel nanocomposites.

Purpose of the Study:

  • To synthesize and characterize highly stretchable elastomeric nanocomposites.
  • To investigate the effect of sodium alginate nanoparticles on the properties of cationic polyurethane dispersions.
  • To evaluate the thermal-mechanical properties and compatibility of the developed CPUD/SA systems.

Main Methods:

  • Solution blending of sodium alginate and aqueous cationic polyurethane dispersions.
  • Synthesis of CPUDs via step-growth polymerization using N-methyldiethanolamine.
  • Characterization using Fourier-transform infrared spectroscopy (FTIR) and dynamic mechanical thermal analysis (DMTA).
  • Morphological analysis using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX).

Main Results:

  • Successful preparation of elastomeric samples based on CPUD/SA.
  • Confirmation of nanoalginate particles (nanobeads and nanorods) within the matrix via SEM and EDX.
  • Demonstrated increase in thermal properties with higher SA content.
  • All samples exhibited thermoplastic-elastomer behavior with high elongation percentages.
  • DMTA data confirmed excellent compatibility between CPUD and SA nanoparticles.

Conclusions:

  • The developed CPUD/SA nanocomposites are highly stretchable thermoplastic-elastomers.
  • Incorporating SA nanoparticles enhances the thermal properties and compatibility of the polyurethane matrix.
  • The findings indicate significant potential for these materials in applications requiring high elasticity and thermal stability.