Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 106, Issue 2, Pages 730-736Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/app.24174
Keywords
biodegradable; degradation; nanocomposites; organoclay; polyesters
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The biodegradability of poly(butylene adipate-co-butylene terephthalate) (PBAT) and PBAT/starch composites with layered silicates prepared by melt intercalation was evaluated with aerobic biodegradability tests in soil and in an aqueous medium containing activated sludge. Nonmodified montmorillonite (MMT) and octadecylamine-modified montmorillonite (ODA-M), known to give a microcomposite and an intercalated nanocomposite for PBAT, respectively, were used as layered silicates. After they were buried in the soil for 8 months, the PBAT/MMT microcomposite exhibited a higher weight loss than the control PBAT, whereas the PBAT/ODA-M nanocomposite showed a lower weight loss instead. Also, the biodegradability test in the aqueous medium, by determining the biochemical oxygen demand, showed that the addition of MMT and/or starch to PBAT promoted biodegradation, whereas the addition of ODA-M did not. (c) 2007 Wiley Periodicals, Inc.
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