Journal
POLYMER DEGRADATION AND STABILITY
Volume 98, Issue 8, Pages 1473-1480Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2013.04.013
Keywords
Poly(hydroxyalkanoate); Tea plant fiber; Cross linking technique; Mechanical properties; Biodegradation
Categories
Funding
- National Science Council (Taipei City, Taiwan, R.O.C.) [NSC-101-2621-M-244-001]
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The biodegradability, morphology, and mechanical properties of composite materials made from maleic anhydride-grafted poly(hydroxyalkanoate) (PHA-g-MA) and treated (crosslinked) tea plant fibre (t-TPF) were evaluated. Composites containing PHA-g-MA (PHA-g-MA/t-TPF) had noticeably superior mechanical properties compared with those of PHA/TPF because of greater compatibility with TPF. The dispersion of t-TPF in the PHA-g-MA matrix was more homogeneous because of ester formation and the consequent creation of branched and crosslinked macromolecules between the anhydride carboxyl groups of PHA-g-MA and hydroxyl groups in t-TPF. Additionally, the PHA-g-MA/t-TPF composites were more easily processed because of their lower melt viscosities. The water resistance of PHA-g-MA/t-TPF was higher than that of PHA/TPF, although the weight loss of composites buried in soil compost indicated that both were biodegradable, especially at high levels of TPF substitution. The PHA/TPF and PHA-g-MA/t-TPF composites were more biodegradable than pure PHA, which implied a strong connection between TPF content and biodegradability. (C) 2013 Elsevier Ltd. All rights reserved.
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