Abstract
This work is an experimental study of the differential scanning calorimetry characterisation of polymer materials used in food packaging materials, such as polypropylene (0.03 mm), polyethylene (0.1 and 0.03 mm), poly(D-(-)-Β-hydroxybutyrate) (powder), two-layered polypropylene (0.064 mm), and two-layered polypropylene with poly-vinylidene-chloride (0.012/0.021). The polymer stability was checked by simulation of conditions during food preparation in microwave ovens, sterilisation or rapid freezing.
The materials were tested in the temperature range from 40 to 200‡C at different scan rates from 2 to 30°C min−1 during heating or cooling. The enthalpies show a high correlation coefficient (0.964) with scan rate. All samples undergo phase change in the temperature range from 107 to 173°C during heating and enthalpies are in the range from 31.8 to 71.1Jg−1. Upon subsequent cooling from 200°C, the temperature range of phase changes is shifted to lower temperatures from 86 to 102°C with enthalpies ranging from 30.4 to 57.8 J g−1.
Experiments with exposure of polymers to microwave radiation and freezing prove that the phase change considering the temperature range is very similar in all experiments.
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References
Billmeyer F W 1971Textbook of polymer science (New York: John Wiley and Sons)
Bonnet M, Loos J, Petermann J 1998 On the crystallization of syndiotactic polypropylene (SPP) high density polyethylene (HDPE) blends.Colloid Polym. Sci. 276: 524–528
Briese B H, Jendrossek D, Schlegel H G 1994 Degradation of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by aerobic sewage sludge.FEMS Microbiol. Lett. 117: 107–111
Demertzis P G, Franz R 1998 Development of an HPLC method for measurements of the stability of irganox-type polymer antioxidants in fatty food simulants.Z. Lebensmittelunters-forschung. A206: 193–198
Franz R 1995 Permeation of flavour compounds across conventional as well as biodegradable polymer films. InFoods and packaging materials — chemical interactions (eds) P Ackermann, M JÄgerstad, T Ohlsson (Cambridge: The Royal Soc. Chem.)
Fuchs S, Schmidt T, Haftka S, Jerosch J 1998 KristalinitÄtsverÄnderungen durch Sterilisation und Verarbeitung des in der Endoprothetik verwendeten ultrahochmolekularen Polyethylens.Unfallchirurg 101: 382–387
Gajdos J 1996Primjena diferencijalne motridbene kalorimetrije (DSC) za ispitivanje plasticne ambalaze, Diploma work, Faculty of Food Technology and Biotechnology, University of Zagreb, Zagreb
Gajdoš J, Galić K, Kurtanjekz, Cikovic N 2001 Gas permeability and DSC characteristics of polymers used in food packaging.Polym. Testing 20: 49–57
Harding S G, Johns M L, Pugh S R, Fryer P J, Gladden L F 1997 Magnetic resonance imaging studies of diffusion in polymers.Food Additives and Contaminants 14: 583–589
Hoekstra H D, Spoormaker J L, Breen J, Audouin L, Verdu J, 1995 UV-exposure of stabilized and non-stabilized HDPE films: physico-chemical characterisation.Polym. Degrad, Stab. 49: 251–259
Hoekstra H D, Spoormaker J L, Breen J 1996 Mechanical and morphological properties of stabilized and non-stabilized HDPE films versus exposure time. In: (eds) N C Billingham, G KlenderProc. 18th Annual Int. Conf. on Advances in the Stabilization and Degradation of Polymers, Luzern, Switzerland, pp 101–120
Janigova I, Lacik I, Chodak I 2002 Thermal degradation of plasticized poly(3-hydroxybutyrate) investigated by DSC.Polym. Degrad. Stab. 77: 35–41
Johanson F, Levfven A 1995 Food packaging polymers as barriers against aroma vapours and oxygen in fat or humid environment. InFoods and packaging materials — Chemical interactions (eds) P Ackermann, M JÄgerstad, T Ohlsson (Cambridge: The Royal Soc. Chem.)
Khanna Y P, Kuhn W P, Sichina W J 1995 Reliable measurements of the nylon 6 glass transition made possible by the new dynamic DSC.Macromolecules 28: 2644–2651
Pentimalli M, Capitani D, Ferrando A, Ferri D, Ragni P, Segre AL 2000 Gamma irradiation of food packaging materials: an NMR study.Polymer 41: 2871–2881
Plummer C J G, Zanetto J-E, Bourban P-E, Mânson J-AE 2001 The crystallization kinetics of polyamide-12.Colloid Polym. Sci. 279: 312–322
Rellmann J, Schenck H 1992 Barrieremedien.Kunststoffe 82: 729–732
Scheid F 1968Numerical analysis (New York: McGraw-Hill)
Werlein H-D 2001 Discrimination of chocolates and packaging materials by an electronic nose.Eur. Food Res Technol. 212: 529–533
Zhu X, Yan D 2001 Influence of the order of polymer melt on the crystallization behaviour: II. Crystallization kinetics of isotactic polypropylene.Colloid Polym. Sci. 279: 546–553
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Kljusurić, J.G. Changes in polymer foils used in food packaging tested by using differential scanning calorimetry. Sadhana 28, 991–998 (2003). https://doi.org/10.1007/BF02703809
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DOI: https://doi.org/10.1007/BF02703809