Simultaneous Improvement of Mechanical Properties and Thermal Stability of Polyvinyl Chloride Nanocomposite by Magnesium Aluminum-Layered Double Hydroxide

Year : 2025 | Volume : 13 | Special Issue 06 | Page : 825 837
    By

    Ehsan Asghari,

  • Alireza Azizi,

  1. Master’s Graduate, Department of Polymer Engineering, Faculty of Engineering, Qom University of Technology, Qom, Iran
  2. Assistant Professor, Department of Polymer Engineering, Faculty of Engineering, Qom University of Technology, Qom, Iran

Abstract

The application of nanoclays in polyvinyl chloride (PVC) is limited as the organic modifier of conventional nanoclays can degrade PVC. Using usual nanoclays could reduce thermal stability due to the catalytic effects on PVC degradation, so the main chalenge is to find suitable nanoclay for PVC. The effects of two nanoclays, MgAl-layered double hydroxide and alkylammonium-modified montmorillonite, were studied on the mechanical properties of PVC nanocomposites. Dioctyl phthalate (DOP)-plasticized PVC was used as a matrix. Samples containing 1 phr, 3 phr and 5 (phr) of nanoclay were prepared and their mechanical and rheological properties were measured. Alkylammonium-modified montmorillonite nanoclay decreased the thermal stability of PVC despite the improvements in mechanical properties. This type of nanoclay decreased the thermal stability, causing a color change from yellow to pink with increasing the nanoclay content. Simultaneous improvement of mechanical properties and thermal stability of PVC nanocomposites were observed upon using MgAl-layered double hydroxide nanoclay. The results of the dynamic mechanical thermal analysis (DMTA) test showed an increment in the storage modulus and glass transition temperature with the use of MgAl-layered double hydroxide nanoclay, suggesting the significant effect of this type of nanoclay. The results of rheometer mechanical spectroscopy (RMS), however, showed no significant difference in the complex modulus viscosity and loss modulus.

Keywords: Nanocomposite, Nanoclay, PVC, Mechanical properties, Thermal stability.

[This article belongs to Special Issue under section in Journal of Polymer & Composites (jopc)]

How to cite this article:
Ehsan Asghari, Alireza Azizi. Simultaneous Improvement of Mechanical Properties and Thermal Stability of Polyvinyl Chloride Nanocomposite by Magnesium Aluminum-Layered Double Hydroxide. Journal of Polymer & Composites. 2025; 13(06):825-837.
How to cite this URL:
Ehsan Asghari, Alireza Azizi. Simultaneous Improvement of Mechanical Properties and Thermal Stability of Polyvinyl Chloride Nanocomposite by Magnesium Aluminum-Layered Double Hydroxide. Journal of Polymer & Composites. 2025; 13(06):825-837. Available from: https://journals.stmjournals.com/jopc/article=2025/view=234434


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Special Issue Subscription Original Research
Volume 13
Special Issue 06
Received 19/05/2025
Accepted 19/08/2025
Published 19/11/2025
Publication Time 184 Days
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