Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/67526
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dc.titlePreparation and properties of new antioxidants with higher MW
dc.contributor.authorPan, J.-Q.
dc.contributor.authorLiu, N.C.
dc.contributor.authorLau, W.W.Y.
dc.date.accessioned2014-06-17T10:02:13Z
dc.date.available2014-06-17T10:02:13Z
dc.date.issued1998-10
dc.identifier.citationPan, J.-Q.,Liu, N.C.,Lau, W.W.Y. (1998-10). Preparation and properties of new antioxidants with higher MW. Polymer Degradation and Stability 62 (1) : 165-170. ScholarBank@NUS Repository.
dc.identifier.issn01413910
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/67526
dc.description.abstractFive new antioxidants containing hindered phenol groups with higher molecular weight(MW) have been synthesized by direct addition reaction of 2,6-di-tert-butyl-4-hydroxy methyl phenol (DBHMP) and isocyanates. They are 3,5-di-tert-butyl 4-hydroxyl benzyl n-octadecyl carbamate (MW = 531), 3,5-di-tert-butyl-4-hydroxyl benzyl toluene-2,4-dicarbamate (MW = 646) 3,5-di-tert-butyl-4-hydroxyl benzyl hexamethylene dicarbamate (MW = 640), 3,5-di-tert-butyl-4-hydroxyl benzyl isophorone dicarbamate (MW = 694), and 3,5-di-tert-butyl-4-hydroxyl benzyl methylene diphenylene dicarbamate (MW = 722). Structures of these new antioxidants have been characterized by IR, NMR and Elemental Analysis. The stabilizing action of these antioxidants for protecting polypropylene against thermal oxidation was examined. Results show that an increase in the MW of the antioxidant by isocyanation enhanced its thermal stability, hence its stabilizing effectiveness for protecting PP against thermal oxidation is enhanced. Introduction of very long alkyl chains into the antioxidant can effectively improve compatibility of the antioxidant with the polymer substrate. © 1998 Elsevier Science Limited. All rights reserved.
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentCHEMICAL ENGINEERING
dc.description.sourcetitlePolymer Degradation and Stability
dc.description.volume62
dc.description.issue1
dc.description.page165-170
dc.description.codenPDSTD
dc.identifier.isiutNOT_IN_WOS
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