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Diffusion of vinyl chloride from PVC packaging material into food simulating solvents
Author(s) -
Chan R. K. S.,
Anselmo K. J.,
Reynolds C. E.,
Worman C. H.
Publication year - 1978
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760180709
Subject(s) - vinyl chloride , solvent , diffusion , materials science , monomer , volume (thermodynamics) , polyvinyl chloride , chloride , chemical engineering , polymer chemistry , polymer , composite material , organic chemistry , thermodynamics , chemistry , metallurgy , copolymer , physics , engineering
Two models are used to describe vinyl chloride monomer (VCM) diffusion from poly(vinyl chloride) (PVC) packages to food simulating solvents. It was found that when the initial solid concentration in a PVC package is 0,35 ppm: (a) For poor solvents such as water and oils, VCM concentration in the solvent, C l , theoretically will not exceed 20 ppb. (b) For strong solvents, the volume ratio of package solid/solvent should not exceed 0.1 in order to keep ( C l ) max below 20 ppb. (c) It was demonstrated that thickness can be adjusted to give a C l = 20 ppb at the time equal to the shelf‐life of the package. The method can also be used to calculate the initial concentration of VCM in a package which will give a proposed level of maximum C l when the solvent and package geometry are fixed. VCM diffusion from PVC pressure pipe to pipe fluids was similarly analyzed.