Print Email Facebook Twitter Typical diffusion behaviour in packaging polymers - Application to functional barriers Title Typical diffusion behaviour in packaging polymers - Application to functional barriers Author Dole, P. Feigenbaum, A.E. de la Cruz, C. Pastorelli, S. Paseiro, P. Hankemeier, T. Voulzatis, Y. Aucejo, S. Saillard, P. Papaspyrides, C. TNO Kwaliteit van Leven Publication year 2006 Abstract When plastics are collected for recycling, possibly contaminated articles might be recycled into food packaging, and thus the contaminants might subsequently migrate into the food. Multilayer functional barriers may be used to delay and to reduce such migration. The contribution of the work reported here is to establish reference values (at 40°C) of diffusion coefficients and of activation energies to predict the functional barrier efficiency of a broad range of polymers (polyolefins, polystyrene, polyamide, PVC, PET, PVDC, [ethylene vinyl alcohol copolymer], polyacrylonitrile and [ethylene vinyl acetate copolymer]). Diffusion coefficients (D) and activation energies (Ea) were measured and were compiled together with literature data. This allowed identification of new trends for the log D=f(molecular weight) relationships. The slopes were a function of the barrier efficiency of the polymer and temperature. The apparent activation energy of diffusion displayed two domains of variation with molecular weight (M). For low M (gases), there was little variation of Ea. Focusing on larger molecules, high barrier polymers displayed a larger dependence of Ea with M. The apparent activation energy decreased with T. These results suggest a discontinuity between rubbery and glassy polymers. © 2006 Taylor & Francis. Chemicals / CAS: ethylene vinyl acetate copolymer, 24937-78-8; ethylene vinyl alcohol copolymer, 25067-34-9; polyacrylonitrile, 25014-41-9, 63231-45-8; polyamide, 63428-83-1; polyethylene terephthalate, 25038-59-9, 9003-68-3; polystyrene, 9003-53-6; polyvinylchloride, 9002-86-2; rubber, 9006-04-6; vinylidene chloride, 25323-30-2, 75-35-4; Acrylic Resins; ethylene-vinyl alcohol copolymer, 25067-34-9; ethylenevinylacetate copolymer, 24937-78-8; Nylons; PL 732, 83136-87-2; Plastics; polyacrylonitrile, 25014-41-9; Polyenes; Polyethylene Terephthalates; Polymers; Polystyrenes; Polyvinyl Chloride, 9002-86-2; Polyvinyls Subject PackagingAnalytical researchPackagingActivation energyDiffusion coefficientFunctional barrierMigrationPackagingPolymerRecyclingSurrogatesethylene vinyl acetate copolymerethylene vinyl alcohol copolymerglassplasticpolyacrylonitrilepolyamidepolyethylene terephthalatepolymerpolyolefinpolystyrenepolyvinylchloriderubbervinylidene chloridearticlecontrolled studydiffusiondiffusion coefficientenergyfood contaminationfood packagingmolecular weightpredictionpriority journalrecyclingreference valuetemperatureAcrylic ResinsConservation of Natural ResourcesFood ContaminationFood PackagingMolecular WeightNylonsPlasticsPolyenesPolyethylene TerephthalatesPolymersPolystyrenesPolyvinyl ChloridePolyvinylsReference Values To reference this document use: http://resolver.tudelft.nl/uuid:f315edd6-f78c-478b-84bf-8bf3fa0a2d01 DOI https://doi.org/10.1080/02652030500373661 TNO identifier 239119 ISSN 0265-203X Source Food Additives and Contaminants, 23 (2), 202-211 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.