Vol 20, No 1 (2016) > MJT Intl Meeting on Collaborative Technologies >

Thermal Properties, Crystallinity, and Oxygen Permeability of Na-montmorillonite Reinforced Plasticized Poly(lactic acid) Film

Kurniawan Yuniarto 1 , Yohanes Aris Purwanto 2 , Setyo Purwanto 3 , Bruce A. Welt 4 , Hadi Karia Purwadaria 2 , Titi Candra Sunarti 5

Affiliations:

  1. Department of Agricultural Engineering, UniversitasMataram, Mataram 83125, Indonesia
  2. Department of Machinery and Biosystem, Institut Pertanian Bogor, Bogor 16002, Indonesia
  3. National Nuclear Agency, Serpong, Tangerang Selatan15310, Indonesia
  4. Department of Packaging Science, University of Florida, Gainesville 110270, United States of America
  5. Department of Agroindustrial Technology, Institut Pertanian Bogor, Bogor 16680, Indonesia

 

Abstract: Introducing unmodified organically clay/Na-montmorillonite (Na-MMT) was applied into plasticized poly(lactic acid) PLA  to  produce  film  composites  by direct  casting.  Film  composite  structure,  the  crystallinity  degree  and  form, and thermal  properties  were  carried  out  using  X-ray  diffraction  and differential  scanning  calorimetry.  The effect  of NaMMT  to  the  tortuous path  and  the  crystallinity  degree  in  the  plasticized  film  composites  were calculated  in oxygen barrier  properties.  Chromatogram  film  composites resulted  in  an  intercalated  structure  that  showed  peak diffraction angle shift at about 0.2o. Then, a peak diffraction pattern was indicated in  α-form crystal structure. Plasticized PLA has a crystallinity degree at 34%, and the addition of  Na-MMT increased to 52%. Glass transition temperature improved from 53 °C to 57 °C, and melting temperature remained stable at 167 °C. Filling Na-MMT into plasticized PLA caused to enhance a tortuous path about 28% and improved the oxygen permeability to 80%. As a result, the addition of NaMMT of 3% into plasticized PLA during  film composite preparation using the mixing method resulted in balancing properties related to the crystallinity degree, thermal properties, and oxygen barrier properties. 
Keywords: crystallinity, Na-MMT, plasticized PLA, permeability, thermal
Published at: Vol 20, No 1 (2016) pages: 1-6
DOI:

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