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Some novel layered-silicate nanocomposites based on a biodegradable hydroxybutyrate copolymer |
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| Authors: | Xiujuan Zhang Reda Abou-Hussein Isao Noda |
| Institution: | a Department of Chemistry and the Polymer Research Center, The University of Cincinnati, Cincinnati, OH 45221-0172, United States b Department of Polymer Science, University of Southern Mississippi, Hattiesburg, MS 39406-0076, United States c The Procter & Gamble Company, 8611 Beckett Road, West Chester, OH 45069, United States |
| Abstract: | This paper describes the preparation, characterization, mechanical properties and thermal stability of layered silicate nanocomposites based on poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHB-co-PHH, known as NodaxTM). The dispersed phases were organically modified montmorillonites (clay 20A and clay 25A), mica, and talc, and they were introduced by solution mixing. Wide-angle X-ray scattering results and transmission electron microscopy (TEM) images confirmed that these two clays were intercalated and finely distributed in the NodaxTM matrix. This type of layered filler led to remarkable improvements in mechanical properties even at very low loadings. Minimizing aggregation was more of a problem in the case of the mica and the talc, at least in this particular matrix. In some cases, these layered fillers slightly decreased the thermal stability of the NodaxTM. |
| Keywords: | Hydroxybutyrate copolymers NodaxTM Clays Mica Talc Mechanical properties |
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