Degradation behavior of polypropylene – organically modified clay nanocomposites / K. J. Singala in Industrial & engineering chemistry research, Vol. 51 N° 32 (Août 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 32 (Août 2012) . - pp. 10557-10564 Titre : Degradation behavior of polypropylene – organically modified clay nanocomposites Type de document : texte imprimé Auteurs : K. J. Singala, Auteur ; A. A. Mungray, Auteur ; A. K. Mungray, Auteur Année de publication : 2012 Article en page(s) : pp. 10557-10564 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Nanocomposite Résumé : The degradation mechanism of polypropylene (PP)―clay nanocomposites is investigated in the present study. The he pp―clay nanocomposites are prepared through a solution process with 4 and 8 wt % incorporation ot nanoclay in a polymer matrix. Nanoclay with two types of organic modifications (25―30 wt % methyl dihydroxyethyl hydrogenated tallow ammonium (TA) and 25―30 wt % octadecylamine (OA)) is used with isotactic PP, atactic PP, and ethylene propylene copolymer with ∼20 wt % rubber. Characterization of nanocomposites is done through X-ray diffraction (XRD) analysis while melting and crystallization behavior is studied through differential scanning calorimetry (DSC). XRD and DSC analysis shows formation of intercalated type nanocomposites with improved barrier properties. Degradation behavior of nanocomposites is studied through thermogravimetric analysis (TGA). Weight loss curves are further analyzed through the Friedman technique to find the rate of degradation. Nanoclay incorporation increases the lifetime of nanocomposites, calculated using an equation derived by Toop [IEEE Trans. Electr. Insul. 1971, 6, 2―14]. The peak rate of degradation in nanocomposites with isotactic homo PP and ethylene propylene copolymer is found to increase up to 1.5 times. Atactic homo PP and its nanocomposites show only a marginal improvement in properties as well as degradation rate. It is also concluded that the rate of degradation increased with clay loading due to increase in residual impurity. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26259759 [article] Degradation behavior of polypropylene – organically modified clay nanocomposites [texte imprimé] / K. J. Singala, Auteur ; A. A. Mungray, Auteur ; A. K. Mungray, Auteur . - 2012 . - pp. 10557-10564. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 32 (Août 2012) . - pp. 10557-10564 Mots-clés : Nanocomposite Résumé : The degradation mechanism of polypropylene (PP)―clay nanocomposites is investigated in the present study. The he pp―clay nanocomposites are prepared through a solution process with 4 and 8 wt % incorporation ot nanoclay in a polymer matrix. Nanoclay with two types of organic modifications (25―30 wt % methyl dihydroxyethyl hydrogenated tallow ammonium (TA) and 25―30 wt % octadecylamine (OA)) is used with isotactic PP, atactic PP, and ethylene propylene copolymer with ∼20 wt % rubber. Characterization of nanocomposites is done through X-ray diffraction (XRD) analysis while melting and crystallization behavior is studied through differential scanning calorimetry (DSC). XRD and DSC analysis shows formation of intercalated type nanocomposites with improved barrier properties. Degradation behavior of nanocomposites is studied through thermogravimetric analysis (TGA). Weight loss curves are further analyzed through the Friedman technique to find the rate of degradation. Nanoclay incorporation increases the lifetime of nanocomposites, calculated using an equation derived by Toop [IEEE Trans. Electr. Insul. 1971, 6, 2―14]. The peak rate of degradation in nanocomposites with isotactic homo PP and ethylene propylene copolymer is found to increase up to 1.5 times. Atactic homo PP and its nanocomposites show only a marginal improvement in properties as well as degradation rate. It is also concluded that the rate of degradation increased with clay loading due to increase in residual impurity. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26259759

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