Photostabilization of polystyrene/montmorillonite nanocomposite. A factorial experimental design 24
item.page.type
Artigo
Date
2013
item.page.ispartof
Journal of Applied Polymer Science
item.page.citationsscopus
4
Authors
Oliveira C.F.P.
Cremm S.R.
Cruz G.H.S.
Fechine G.J.M.
Cremm S.R.
Cruz G.H.S.
Fechine G.J.M.
publication.page.advisor
Journal Title
Journal ISSN
Volume Title
publication.page.board
publication.page.program
Abstract
The weathering behavior of polystyrene (PS) and PS/montmorillonite nanocomposite with and without addition of ultraviolet (UV) absorber and/or antioxidant was investigated. Samples were exposed to UV radiation in the laboratory for periods of up to approximately 12 weeks. The samples were exposed for various irradiation intervals, and their tensile and impact strength was monitored through a factorial experimental design 24. The molecular weight, yellowness, and fracture surface were also monitored. The results generated by analysis of variance (ANOVA) Table showed that UV absorber and exposure time had the most important effects positive and negative, respectively. These results could be seen for neat PS and PS/MMT nanocomposite. The presence of antioxidant alone did not have any significant effect but when mixed with UV absorber presented a small synergism. These results corroborate with molecular weight, yellowing and fracture surface of tensile and impact samples. © 2012 Wiley Periodicals, Inc.
Description
Keywords
item.page.scopussubject
Exposure-time , Factorial design , Factorial experimental design , Fracture surfaces , Photostabilization , Ultraviolet absorbers , UV absorbers , Weathering behavior