INSTITUTUL NAÅ¢IONAL DE CERCETARE-DEZVOLTARE - ICECHIM

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2. Multifunctional materials and nanocomposites - OTHERMO-ANALYTICAL INVESTIGATION OF STRUCTURE ANDBIODEGRADABILITY OF LOW DENSITY POLYETHYLENEAdina Magdalena MUSUC a , Mihaela BADEA DONI b , Luiza JECU b , Adriana RUSU a ,Vlad Tudor POPA aa Romanian Academy ”Ilie Murgulescu” Institute of Physical Chemistry, 202 Spl.Independentei, 060021 Bucharest, ROMANIA.b National Research & Development Institute for Chemistry & Petrochemistry – ICECHIM,202 Spl. Independentei, 060021 Bucharest, ROMANIAThe increasing use of synthetic films leads to a series of ecological problems due to their nonbiodegradability[1-4]. Current food packaging must be resistant to immediate microbialattack in order to prevent food contamination due to damaged packaging before expiration theproduct warranty, and on the other hand must be biodegradable in order to meet theenvironmental protection [5-7]. Polyethylene is one of the synthetic polymers widely used aspackaging material. In natural form, it is not biodegradable. To make polyethylenebiodegradable requires modifying its crystalline degree, molecular weight and mechanicalproperties that are responsible for its resistance towards degradation [8]. The biodegradabilitystudies were carried out by incubating the low density polyethylene films (LDPE) modifiedwith natural antioxidants with Aspergillus sp. in liquid media for 50 days. The structure of thesamples before and after microbial attack was investigated using the following methods:optical microscopy, X-ray diffractions (XRD), Fourier Transform Infrared Spectroscopy (FT-IR) and microcalorimetry (microDSC).[1] H.-Y. Cheung, M.-P. Ho, K.-T. Lau, F. Cardona, D. Hui, Composites: Part B, 40 (2009) 655–63.[2] J. P. Eubeler, M. Bernhard, T. P. Knepper, Trends Anal Chem 29(1) (2010) 84-100.[3] J. P. Eubeler, M. Bernhard, S. Zok, T. P. Knepper, Trend Anal Chem 28(9) (2009) 1057-72.[4] L.S.Nair, C.T.Laurencin, Prog Polym Sci 32 (2007) 762-98.[5] F. Carrasco, P.Pages, J.Gamez-Perez, O.O.Santana, M.I.Maspoch, Polym Degrad Stab 95 (2010) 119-25.[6] A.P.Gupta, V.Kumar, Eur Polym J 43 (2007) 1123-74.[7] L.T.Lim, R.Auras, M.Rubino, Prog Polym Sci 33 (2008) 820-52.[8] A. A. Shah, F. Hasan, A. Hameed, S. Ahmed, Biotechnol. Adv. 26 (2008) 246–265.Acknowledgements: This work was supported by a grant of the Romanian National Authority for ScientificResearch, CNCS – UEFISCDI, project number PN-II-RU-PD-2011-3-0057
2. Multifunctional materials and nanocomposites - PTalon Participare Priochem 7:Nume: APOSTOL PetruFunctia: cercetator stiintificInstitutia: Institutul de Fizica AplicataAdresa: Chisinau, str.Academiei 5, R. MoldovaTelefon: +373(22) 738150Email: apopetru@gmail.comFax: +373(22) 738149Doresc sa particip: Cu LucrareTipul lucrarii: PosterSectiunea: Materiale multifunctionale si nanocompoziteTitlul lucrarii: \'\'Synthesis and optical properties of PbSe nanoparticles in aqueoussolutions\'\'Autori: Apostol Petru, Mihail Revenco.
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