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Stability Qualification of Resins/Metallic Oxide Composites for Surface Oxidative Protection
Traian Zaharescu1,2, Radu Mirea3, Tunde Borbath2
1INCDIE-ICPE CA, Radiochemical Center, 313 Splaiul Unirii, Ro 030138 Bucharest, Romania.
Polymers
|February 10, 2024
Summary
Gamma irradiation accelerates alkyd resin degradation. Inorganic oxides enhance thermal resistance and activation energy against radiolysis, improving material stability under irradiation.
Area of Science:
- Polymer Science
- Materials Science
- Radiation Chemistry
Background:
- Alkyd resins are susceptible to degradation under various environmental conditions.
- Understanding the impact of gamma irradiation is crucial for predicting material lifespan.
- Chemiluminescence is a sensitive technique for studying degradation mechanisms.
Purpose of the Study:
- To investigate the accelerated degradation of alkyd resins induced by gamma irradiation.
- To evaluate the effect of inorganic oxides on the radiation stability of alkyd resins.
- To elucidate the degradation mechanism under non-isothermal conditions.
Main Methods:
- Non-isothermal chemiluminescence measurements were employed.
- Samples were subjected to varying doses of gamma irradiation.
- Thermogravimetric analysis was used to assess thermal stability.
- Activation energies for oxidative degradation were calculated.
Main Results:
- Gamma irradiation significantly accelerated the degradation of alkyd resins.
- The presence of inorganic oxides increased thermal resistance and activation energy.
- Irradiated samples exhibited lower chemiluminescence intensity compared to unirradiated ones.
- Oxidation onset temperature was observed to be around 75 °C for irradiated samples.
Conclusions:
- Inorganic oxides act as stabilizers, enhancing the radiation resistance of alkyd resins.
- The degradation mechanism involves competition between degradation and crosslinking processes.
- Gamma irradiation alters the chemiluminescence profile, indicating changes in degradation pathways.
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