期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 30, 期 1, 页码 17-23出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200800553
关键词
adhesion; interfacial adhesion; PE; polyethylene heat sealants; polymer nanocomposites
资金
- National Science Foundation [DMR-0602877]
- Penn State University Agricultural Experimental Station
A novel heat-sealing performance is achieved by polyethylene (PE) nanocomposites reinforced by ethylene vinyl acetate (EVA) and montmorillonite (MMT). Appropriate nanocomposite design leads to hermetic seals with a general peelable/easy-open character across the broadest possible sealing temperature range. Observations of the fracture seal surfaces by infrared spectroscopy and electron microscopy reveal that this behavior originates from a synergistic effect of the EVA copolymer and the montmorillonite clav nanofiller. Namely, the combination of EVA-copolymers and MMT nano-fillers provides sufficiently favorable interactions for nanocomposite formation and mechanical robustness, but weak enough interfacial adhesion to promote a general cohesive failure of the sealant at the EVA/MMT interfaces.
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