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Features of Thermal Stabilization of PVC Modified with Microstructured Titanium Phosphate.
Irina N Vikhareva1, Anton Abramian1, Dragan Manojlović2,3
1Nanotechnology REC, South Ural State University, Lenin Prospect 76, 454080 Chelyabinsk, Russia.
Polymers
|August 14, 2025
Summary
New titanium phosphates (TiP) with controlled structures act as effective thermal stabilizers for Poly(vinyl chloride) (PVC). These materials enhance PVC stability by neutralizing HCl and forming protective barriers, offering eco-friendly alternatives.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Poly(vinyl chloride) (PVC) requires thermal stabilizers due to degradation during processing and use.
- Existing stabilizers may pose environmental or health concerns.
Purpose of the Study:
- To evaluate hierarchically structured titanium phosphates (TiP) as novel thermal stabilizers for plasticized PVC.
- To investigate the influence of TiP morphology and Ti/P ratio on stabilizing efficiency.
Main Methods:
- Thermogravimetric analysis (TGA) in inert (Ar) and oxidizing (air) atmospheres.
- Assessment of degradation parameters: onset temperature, decomposition rate, exothermic effects, and residue yield.
- Analysis of TiP concentration and synergy with industrial stabilizers.
Main Results:
- TiPMSI/TiPMSII microspheres improved degradation onset temperature and residue yield in inert atmospheres.
- TiPR rods and TiPMSII microspheres enhanced stability in oxidizing atmospheres, reducing degradation rate by 10-15%.
- Optimal effectiveness linked to ordered morphology, Ti-deficient Ti/P ratio (~0.86) for HCl binding, and crystallinity.
Conclusions:
- Hierarchically structured titanium phosphates show significant potential as multifunctional PVC thermostabilizers.
- Stabilization mechanism involves HCl neutralization, barrier formation, and inhibition of oxidative processes.
- TiP offers a pathway for developing environmentally friendly, high-performance, and halogen-free PVC materials.
