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Cracking formation on the surface of extruded photodegraded polypropylene plates

Fechine, G.J.M. ; Demarquette, N.R.

Polymer engineering and science, 2008-02, Vol.48 (2), p.365-372 [Periódico revisado por pares]

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

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  • Título:
    Cracking formation on the surface of extruded photodegraded polypropylene plates
  • Autor: Fechine, G.J.M. ; Demarquette, N.R.
  • Assuntos: Ageing ; Applied sciences ; Cracks ; Evaluation ; Exact sciences and technology ; Extrusion ; Materials science ; Mechanical properties ; Oxidation ; Physical properties ; Polymer industry, paints, wood ; Polymer processing ; Polypropylene ; Properties and testing ; Technology of polymers
  • É parte de: Polymer engineering and science, 2008-02, Vol.48 (2), p.365-372
  • Notas: ark:/67375/WNG-D35KJSH6-L
    ArticleID:PEN20958
    istex:2C6B866BF200EB910A6A122E8AB6E0A321BAB31E
    Brazilian Funding Agency, FAPESP
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: The cracking formation during the photodegradation of polypropylene (PP) plates (1 mm thickness), with (PPOx) and without pro‐oxidant (PP), has been investigated. The plates were produced by extrusion in an industrial production line and were exposed to ultraviolet radiation in the laboratory for periods of up to 480 hr. The samples were investigated by infrared spectroscopy—FTIR, optical light microscopy, differential scanning calorimetry (DSC) and X‐ray diffraction (XRD). The results showed that the extension of photodegradation process is more intense for PPOx than for PP samples. For both samples, cracks were formed at the surface perpendicularly to the flow‐lines. However the cracks frequency was different for both samples and sides of sample. The crack frequency was correlated with chain orientation, A110; it was shown that lower degrees of orientation resulted in lower crack frequency. POLYM. ENG. SCI., 2008. © 2007 Society of Plastics Engineers
  • Editor: Hoboken: Wiley Subscription Services, Inc., A Wiley Company
  • Idioma: Inglês
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