Sorption Behavior of Selected Aldehyde-scavenging Agents in Poly(ethylene terephthalate) Blends |
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| Authors: | EC Suloff JE Marcy BA Blakistone SE Duncan TE Long SF O'Keefe |
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| Affiliation: | Author Suloff is with the Intl. Food Network, Inc., Ithaca, N.Y. Authors Duncan, Marcy, and O'Keefe are with the Dept. of Food Science and Technology, Virginia Polytechnic Inst. And State Univ., Duck Pond Rd., Blacksburg, VA 24061. Author Blakistone is with Graham Packaging Co., York, Pa. Author Long is with the Dept. of Chemistry, Virginia Polytechnic Inst. And State Univ., Blacksburg, Va. Direct inquiries to author Marcy (E-mail: ). |
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| Abstract: | ABSTRACT: Poly(m-xylylene adipamide) (nylon MXD6), D-sorbitol, and a-cyclodextrin aldehyde-scavenging agents were blended with poly(ethylene terephthalate) and thermally pressed into films. Films were stored in an acidified aqueous model solution (pH 3.6) containing a 25 μM mixture of acetaldehyde, propionaldehyde, butyraldehyde, valeraldehyde, and caproaldehyde for 1, 3, 7, and 14 d. The total amount of aldehydes sorbed by films was 2 to 10 times higher for films containing aldehyde-scavenging agents than nonblended films. Aldehyde-scavenging films demonstrated selective scalping, preferring smaller molecular weight aldehydes to larger aldehydes. Partition coefficients for smaller aldehydes were 3 to 6 times greater for aldehyde-scavenging films than control film. |
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| Keywords: | active packaging aldehydes food packaging scalping scavenging |
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