Phase behaviour of poly(l-lactic acid) (PLLA) and its blends with poly(ethylene oxide) (PEO)

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dc.contributor.advisor Singfield, Kathy
dc.creator Zhang, Xiaocan
dc.date.accessioned 2011-05-09T12:32:09Z
dc.date.available 2011-05-09T12:32:09Z
dc.date.issued 2006
dc.identifier.other QD382 C78 Z43 2006
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/22478
dc.description xviii, 144 leaves : ill. (some col.) ; 28 cm.
dc.description Includes abstract.
dc.description.abstract A combination of polarized light optical microscopy (PLOM), scanning electron microscopy (SEM), and total depolarized light intensity (DLI) investigations were performed to understand the phase behaviour and micro-level morphology of melt-crystallized poly(l-lactic acid) (PLLA) and its blend with poly(ethylene oxide) (PEO) before and after enzymatic degradation. Three distinct blend groups with respect to the blend composition have been identified: (i) 10--20 wt% PEO in which the PEO is not able to form any ordered structure in the binary blend; (ii) 30--50 wt% PEO in which the PEO is able to form some order but not enough to develop spherulitic crystals; (iii) 60--90 wt% PEO in which the PEO forms a network of spherulites throughout the pre-crystallized PLLA. The predominant lamellar structure of the PLLA component is concluded to be edge-on and flat-on in group (ii) and (iii), respectively.
dc.language.iso en
dc.publisher Halifax, N.S. : Saint Mary's University
dc.subject.lcc QD382.C78
dc.subject.lcsh Crystalline polymers
dc.subject.lcsh Crystallization
dc.subject.lcsh Fusion
dc.subject.lcsh Morphology
dc.subject.lcsh Polyesters -- Structure
dc.subject.lcsh Polyethers -- Structure
dc.title Phase behaviour of poly(l-lactic acid) (PLLA) and its blends with poly(ethylene oxide) (PEO)
dc.type Text
thesis.degree.name Master of Science in Applied Science
thesis.degree.level Masters
thesis.degree.discipline Chemistry
thesis.degree.grantor Saint Mary's University (Halifax, N.S.)


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