Decomposition of epoxy resin in supercritical isopropanol / Guozhan Jiang in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4535–4541 Titre : Decomposition of epoxy resin in supercritical isopropanol Type de document : texte imprimé Auteurs : Guozhan Jiang, Auteur ; Stephen J. Pickering, Auteur ; Edward H. Lester, Auteur Année de publication : 2010 Article en page(s) : pp. 4535–4541 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Isopropanol Hydroxide Résumé : This paper reports the decomposition of an amine-cured bisphenol A diglycidyl ether (DGEBA) epoxy resin in supercritical isopropanol in a flow reactor with and without potassium hydroxide (KOH). The decomposition process was monitored by the change of the refractive index of the exit solution with time. The product distribution was analyzed using gas chromatography−mass spectroscopy (GC-MS) and compared with those obtained from the decomposition in supercritical 1-butanol and pyrolysis processes. This study indicated that thermolysis played a key role in cleaving the chemical bonds of the epoxy resin, and that supercritical isopropanol reduced char formation, because of the rapid removal of the primary decomposition products from the reaction zone to lessen secondary reactions. KOH reduced the initial decomposition temperature of the epoxy resin, but it also promoted the Guerbet reaction of isopropanol to form complex alcohols. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901542z [article] Decomposition of epoxy resin in supercritical isopropanol [texte imprimé] / Guozhan Jiang, Auteur ; Stephen J. Pickering, Auteur ; Edward H. Lester, Auteur . - 2010 . - pp. 4535–4541. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4535–4541 Mots-clés : Isopropanol Hydroxide Résumé : This paper reports the decomposition of an amine-cured bisphenol A diglycidyl ether (DGEBA) epoxy resin in supercritical isopropanol in a flow reactor with and without potassium hydroxide (KOH). The decomposition process was monitored by the change of the refractive index of the exit solution with time. The product distribution was analyzed using gas chromatography−mass spectroscopy (GC-MS) and compared with those obtained from the decomposition in supercritical 1-butanol and pyrolysis processes. This study indicated that thermolysis played a key role in cleaving the chemical bonds of the epoxy resin, and that supercritical isopropanol reduced char formation, because of the rapid removal of the primary decomposition products from the reaction zone to lessen secondary reactions. KOH reduced the initial decomposition temperature of the epoxy resin, but it also promoted the Guerbet reaction of isopropanol to form complex alcohols. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901542z

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Temperature dependence of the dielectric properties of 2,2′-azobis(2-methyl-butyronitrile) (AMBN) / Smith, Alastair D. in Industrial & engineering chemistry research, Vol. 49 N° 6 (Mars 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 3011–3014 Titre : Temperature dependence of the dielectric properties of 2,2′-azobis(2-methyl-butyronitrile) (AMBN) Type de document : texte imprimé Auteurs : Smith, Alastair D., Auteur ; Edward H. Lester, Auteur ; Thurecht, Kristofer J., Auteur Année de publication : 2010 Article en page(s) : pp. 3011–3014 Note générale : Industrial Chermistry Langues : Anglais (eng) Mots-clés : Temperature--Dependence--Dielectric--Azobis--methyl--butyronitrile--AMBN Résumé : For the first time, the response of 2,2′-azobis(2-methyl-butyronitrile) (AMBN) to microwave heating at 2.45 GHz was studied by measuring its dielectric properties as a function of temperature with the observed variations being attributed to the physical form of the initiator, the 1 h decomposition half-life temperature, and the relaxation frequency. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901389a [article] Temperature dependence of the dielectric properties of 2,2′-azobis(2-methyl-butyronitrile) (AMBN) [texte imprimé] / Smith, Alastair D., Auteur ; Edward H. Lester, Auteur ; Thurecht, Kristofer J., Auteur . - 2010 . - pp. 3011–3014. Industrial Chermistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 3011–3014 Mots-clés : Temperature--Dependence--Dielectric--Azobis--methyl--butyronitrile--AMBN Résumé : For the first time, the response of 2,2′-azobis(2-methyl-butyronitrile) (AMBN) to microwave heating at 2.45 GHz was studied by measuring its dielectric properties as a function of temperature with the observed variations being attributed to the physical form of the initiator, the 1 h decomposition half-life temperature, and the relaxation frequency. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901389a

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