[article]
| Titre : |
Chemical properties of polymers |
| Type de document : |
texte imprimé |
| Auteurs : |
Tipanna Melkeri, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 98-100 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Polymères -- Propriétés chimiques
|
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Chemical resistance is the ability of a polymeric material to maintain its original properties such as mechanical, electrical, optical etc. when exposed to certain chemicals. The chemical structure of the polymer and functional group present in it is responsible for chemical resistance. Polymers are used in plastics as well as paints. Chemical resistance testing on plastic automotive materials is essential to gauge how such parts withstand the influence of mostly aggressive, automotive fluids such as fuels, biofuels, cleaners, cooling liquids and lubricants, often in combination with high temperature fluctuations. Steel structure has to be protected from the corrosion atmosphere specially in chemical industry so these structures are painted. The polymer used in these paints are must be resistance towards acid, alkali, solvents and other reactive chemical reagent. It is important that these polymer must exhibits good chemical resistance. Polymer can be affected by two ways either the chemical reagent acts as a solvent or chemical reagent attacks the polymeric material. Factors affecting the chemical resistance of the polymer are time of exposure, temperature of exposure, concentration of reagent, stress present in polymer and other ingredients present in plastics or paint formulations. |
| Note de contenu : |
- INTRODUCTION : The chemical reagent act as a solvent - Chemical reagent attacks the polymeric material
- FACTORS AFFECTING CHEMICAL RESISTANCE : I) Time of exposure in the presence of the indicated chemical reagent - II) Temperature of expose - III) Stresses in molded and external to which the application is subjected - IV) Concentration of the indicated chemical reagent - V) Presence of other ingredients
- Solvent resistance testing : Test procedure - Specimen size - Data
- Table 1 : Material, Hansen parameters and Hilderbrand solubility parameter
- Table 2 : Chemical resistance of plastics |
| En ligne : |
https://drive.google.com/file/d/1Z_E7kfN2Jk8k72my223vaKHmHsHxkW1R/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35229 |
in PAINTINDIA > Vol. LXXI, N° 1 (01/2021) . - p. 98-100
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Chemical properties of polymers in PAINTINDIA, Vol. LXXI, N° 1 (01/2021)
