IJ Thirty-nine liquid compounds were studied as to their sorption by nylon. Each liquid was kept in contact with test samples of nylon until equilibrium was established, and then the amount of compound sorbed was determined in a thermogravimetric analysis instrument. The same instrument was then used to desorb the compound from the nylon at a specified rate of heating. The resulting thermogram permitted the evaluation of the activation energy of desorption. Twenty compounds were found to be significantly sorbed by nylon, while the remaining compounds were not significantly sorbed. It was apparent that compounds having hydrogen-bonding potential would interact with nylon in most instances. Several compounds not possessing hydrogen-bonding properties were also sorbed but to a much lesser extent. The size of the molecule in a homologous series also played a part in the extent of sorption and in the energy requirement for sorption. Thermal gravimetric analysis appears to be a practical method for conducting sorption studies when large numbers of compounds are to be studied or screened for a packaging application in a polymeric material.
Keyphrases 0 Sorption equilibria-liquids sorbed by nylon 0 Nylon-liquid sorption equilibrium-thermal gravimetric analysis 0 Thermal gravimetric analysis-liquid-nylon sorption Activation energy, desorption-liquids from nylon 0 Containers, plasticliquids-nylon sorption * The TGA instr-ent consisted of the. following: (a) Fisher model