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Improved dispersion of grafted starch granules leads to lower water resistance for starch-g-PLA/PLA composites
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- Yang, Xi (author)
- KTH,Fiber- och polymerteknologi
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- Finne-Wistrand, Anna (author)
- KTH,Fiber- och polymerteknologi
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- Hakkarainen, Minna (author)
- KTH,Polymerteknologi
- (creator_code:org_t)
- Elsevier, 2013
- 2013
- English.
- In: Composites Science And Technology. - : Elsevier. - 0266-3538 .- 1879-1050. ; 86, s. 149-156
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Polylactide (PLA) was grafted on the surface of starch (St) granules to improve the interfacial adhesion between starch granules and PLA matrix in starch/PLA blends. The grafting significantly improved strain at failure values of St-g-PLA/PLA 25:75 blends as compared to starch/PLA 25:75 blends. However, unexpectedly the water resistance of the films significantly deteriorated after the surface grafting. SEM and FTIR analysis showed that St-g-PLA was evenly distributed at the film surface and in the bulk, while unmodified starch was encapsulated inside the PLA matrix. This resulted in rapid leaching of St-g-PLA from the films during aging in water, while the unmodified starch granules were protected by PLA matrix.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Keyword
- Polymer matrix composites (PMCs)
- Environmental degradation
- Mechanical properties
- Infrared (IR) spectroscopy
- Scanning electron microscopy (SEM)
Publication and Content Type
- ref (subject category)
- art (subject category)
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