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Polymer Classification: Crystallinity01:21

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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  11. Effect Of Nano Spinel Ferrites Co0.9cu0.1fe2o4 On Non-isothermal Cold Crystallization Behaviours And Kinetics Of Its Composites With Polylactic Acid.
  1. Home
  3. Research Domains
  5. Physical Sciences
  7. Condensed Matter Physics
  9. Surface Properties Of Condensed Matter
  11. Effect Of Nano Spinel Ferrites Co0.9cu0.1fe2o4 On Non-isothermal Cold Crystallization Behaviours And Kinetics Of Its Composites With Polylactic Acid.

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Effect of Nano Spinel Ferrites Co0.9Cu0.1Fe2O4 on Non-Isothermal Cold Crystallization Behaviours and Kinetics of Its Composites with Polylactic Acid.

Wael H Alsaedi1, Khulood A Abu Al-Ola1, Omaima Alhaddad1

  • 1Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Munawarah P.O. Box 30002, Saudi Arabia.

Polymers
|May 11, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

This study synthesized Co0.9Cu0.1Fe2O4 (AM) magnetic nanoparticles and incorporated them into polylactic acid (PLA). The AM nanoparticles enhanced PLA crystallization but decreased its thermal stability.

Keywords:
Co0.9Cu0.1Fe2O4 magnetic nanoparticlesDSCPLAPOM

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Polylactic acid (PLA) is a biodegradable polymer with potential applications in various fields.
  • Enhancing the properties of PLA, such as its crystallization behavior and thermal stability, is crucial for its wider adoption.
  • Spinel ferrite nanoparticles offer unique magnetic and structural properties that can be leveraged to modify polymer matrices.

Purpose of the Study:

  • To synthesize Co0.9Cu0.1Fe2O4 (AM) ceramic magnetic nanoparticles (NPs) using a hydrothermal route.
  • To investigate the effects of incorporating AM NPs on the morphology, crystallization behavior, and thermal properties of polylactic acid (PLA) nanocomposites.
  • To analyze the crystallization kinetics of PLA/AM nanocomposites using Avrami models.

Main Methods:

TGA
crystallization
hydrothermal synthesis
  • Hydrothermal synthesis of Co0.9Cu0.1Fe2O4 (AM) nanoparticles.
  • Characterization using X-ray diffraction (XRD), Energy-dispersive X-ray (EDX) spectroscopy, and Field Emission-Scanning Electron Microscopy (FE-SEM).
  • Analysis of PLA nanocomposites using Polarized Light Optical Microscopy (POM), Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), and Avrami kinetics.

Main Results:

  • Single cubic spinel phase confirmed for AM NPs.
  • POM revealed a significant increase in PLA spherulites with increasing AM NP content.
  • DSC indicated that AM NPs act as efficient nucleating agents, lowering crystallization temperature and reducing crystallization half-time (t1/2), thus accelerating crystallization.
  • TGA data showed a decrease in the thermal stability of PLA upon addition of AM NPs.

Conclusions:

  • Co0.9Cu0.1Fe2O4 nanoparticles were successfully synthesized and confirmed to have a single cubic spinel structure.
  • The incorporation of AM nanoparticles into PLA significantly enhances its crystallization rate and acts as an effective nucleating agent.
  • While improving crystallization, the presence of AM nanoparticles leads to a reduction in the overall thermal stability of the PLA matrix.