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Synthesis and UV absorption properties of 5,5′-methylenedisalicylic acid-intercalated Zn−Al layered double hydroxides / Cui, Guo-Jing in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 448–453 Titre : Synthesis and UV absorption properties of 5,5′-methylenedisalicylic acid-intercalated Zn−Al layered double hydroxides Type de document : texte imprimé Auteurs : Cui, Guo-Jing, Auteur ; Xu, Xiang-Yu, Auteur ; Lin, Yan-Jun, Auteur Année de publication : 2010 Article en page(s) : pp 448–453 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : UV  absorption  Methylenedisalicylic  Hydroxides. Résumé : A UV absorber, 5,5′-methylenedisalicylic acid (MDSA), has been intercalated into a ZnAl−NO3 layered double hydroxide (LDH) by an ion-exchange method. After intercalation of MDSA, the basal spacing in the LDH increased from 0.90 to 1.53 nm, suggesting that the MDSA anions were arranged in the interlayer galleries of ZnAl−MDSA LDH as a tilted monolayer arrangement of dianions. Infrared spectroscopy and thermogravimetry and differential thermal analysis (TGA−DTA) curves revealed the presence of a complex system of supramolecular host−guest interactions. The thermal stability of the intercalated UV absorbent was investigated by TGA−DTA, which showed that the thermostability was markedly enhanced after intercalation into the LDH host. After addition of 1 wt % ZnAl−MDSA LDH to polypropylene (PP), the resistance of the polymer to UV degradation was significantly improved. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901151c [article] Synthesis and UV absorption properties of 5,5′-methylenedisalicylic acid-intercalated Zn−Al layered double hydroxides [texte imprimé] / Cui, Guo-Jing, Auteur ; Xu, Xiang-Yu, Auteur ; Lin, Yan-Jun, Auteur . - 2010 . - pp 448–453. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 448–453 Mots-clés : UV  absorption  Methylenedisalicylic  Hydroxides. Résumé : A UV absorber, 5,5′-methylenedisalicylic acid (MDSA), has been intercalated into a ZnAl−NO3 layered double hydroxide (LDH) by an ion-exchange method. After intercalation of MDSA, the basal spacing in the LDH increased from 0.90 to 1.53 nm, suggesting that the MDSA anions were arranged in the interlayer galleries of ZnAl−MDSA LDH as a tilted monolayer arrangement of dianions. Infrared spectroscopy and thermogravimetry and differential thermal analysis (TGA−DTA) curves revealed the presence of a complex system of supramolecular host−guest interactions. The thermal stability of the intercalated UV absorbent was investigated by TGA−DTA, which showed that the thermostability was markedly enhanced after intercalation into the LDH host. After addition of 1 wt % ZnAl−MDSA LDH to polypropylene (PP), the resistance of the polymer to UV degradation was significantly improved. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901151c