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Xu W.C.,Beijing Key Laboratory of Printing and Packaging Materials and TechnologyBeijing Institute of Graphic CommunicationBeijing102600 Peoples Republic of China | Li D.L.,Beijing Key Laboratory of Printing and Packaging Materials and TechnologyBeijing Institute of Graphic CommunicationBeijing102600 Peoples Republic of China | Fu Y.B.,Beijing Key Laboratory of Printing and Packaging Materials and TechnologyBeijing Institute of Graphic CommunicationBeijing102600 Peoples Republic of China | Liao R.J.,Beijing Key Laboratory of Printing and Packaging Materials and TechnologyBeijing Institute of Graphic CommunicationBeijing102600 Peoples Republic of China | And 3 more authors.
Journal of Applied Polymer Science | Year: 2015

In this article, we present a process for preparing organovermiculites, which consist of expanded vermiculite (EVMT)-poly(vinyl alcohol) (PVOH) created by the mechanical ball-milling of EVMT in a PVOH-water solution. We then discusses the influence of EVMT-PVOH on the barrier performance, crystallization behavior, thermal stability, and mechanical properties of modified blown polypropylene (PP) films. EVMT was intercalated and exfoliated by PVOH macromolecules to obtain a kind of hybrid EVMT-PVOH. PVOH served as both an intercalating agent into EVMT and a compatibilizer between EVMT and PP. Compared with the original (unmodified) PP, when the EVMT loading ranged from 0.1 to 2.0%, although the crystallinity decreased for most PP films, the thermal stability and mechanical properties all improved. Moreover, EVMT platelike particles with a high aspect ratio (ca. 550) dispersed in the PP matrix also improved the barrier properties of the modified PP films, which was in accordance with the Nielsen model. © 2015 Wiley Periodicals, Inc. Source

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