Oxidative degradations of oxodegradable LDPE enhanced with thermoplastic pea starch: Thermo-mechanical properties, morphology, and UV-ageing studies

Jean Marie Raquez, Audrey Bourgeois, Heidi Jacobs, Philippe Degée, Michael Alexandre, Philippe Dubois

Research output: Contribution to journalArticlepeer-review

Abstract

The abiotic UV-degradation behavior of oxodegradable LDPE was investigated in the presence of thermoplastic pea starch (TPPS) in this study. Oxodegradable LDPE was first melt-blended with thermoplastic pea starch (TPPS) using an internal mixing chamber to enhance the abiotic oxidative degradation of oxodegradable LDPE. Because of their different affinity, maleated polyethylene was added as compatibilizer. Tensile properties, thermal properties, and morphology of resulting melt-blends were determined at different content in TPPS. High content in TPPS (40 wt %) could be readily added to oxodegradable LDPE without affecting the tensile properties of resulting melt-blends. UV-ageing studies on compatibilized TPPS/oxodegradable LDPE melt-blends were carried out by Attenuated Total Reflectance infrared spectroscopy (ATR-FTIR), Dynamic Thermomechanical Analyses (DMTA) and Differential Scanning Calorimetry (DSC) under abiotic conditions. These results suggested a synergistic effect on the UV-ageing of TPPS-based melt-blends provided by both components during the first stage of UV-irradiation.

Original languageEnglish
Pages (from-to)489-496
Number of pages8
JournalJournal of Applied Polymer Science
Volume122
Issue number1
DOIs
Publication statusPublished - 5 Oct 2011
Externally publishedYes

Keywords

  • melt-blends
  • oxodegradable LDPE
  • pea starch
  • synergistic association
  • UV-ageing

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