Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/107028
Type: Artigo de periódico
Title: Study Of Parameters Interfering In Oxidative Induction Time (oit) Results Obtained By Differential Scanning Calorimetry In Polyolefin
Author: Rosa D.S.
Sarti J.
Mei L.H.I.
Filho M.M.
Silveira S.
Abstract: Sample preparation and test conditions are parameters recognized to influence Oxidative Induction Time (OIT) results obtained by Differential Scanning Calorimetry (DSC). Therefore, many laboratory practices have been written to prevent this interference. However, quantitative results on the variability of OIT as a function of these parameters have not been presented systematically in the literature. The following parameters were investigated using a two level factorial design and High Density Polyethylene samples: (1) sample shape - pulverizing and cutting pieces of sample; (2) amount of sample - 2 and 8 mg; (3) heating rates to reach the isotherm - fast and 10 °C/min; (4) oxygen flow - 20 and 60 ml/min. Sample shape, amount of sample and heating rate were the parameters that showed significant variability. Higher order interactions were considered negligible. Finally, the variation of the parameters under assessment was described by a linear model obtained with the aide of the chemometric method of Yates' Algorithm.
Editor: Elsevier Science Ltd, Exeter, United Kingdom
Rights: fechado
Identifier DOI: 10.1016/S0142-9418(99)00022-7
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0033737256&partnerID=40&md5=81d76a3010627daee38f92791aac66f0
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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