Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34324
DC FieldValueLanguage
dc.contributor.authorHo, R.M.en_US
dc.contributor.author林助傑zh_TW
dc.contributor.authorHsieh, P.Y.en_US
dc.contributor.authorTseng, W.H.en_US
dc.contributor.authorLin, C.C.en_US
dc.contributor.authorHuang, B.H.en_US
dc.contributor.authorLotz, B.en_US
dc.date2003zh_TW
dc.date.accessioned2014-06-06T07:47:33Z-
dc.date.available2014-06-06T07:47:33Z-
dc.identifier.issn0024-9297zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/34324-
dc.description.abstractThe formation of large-sized, well-oriented microdomains Of poly(L-lactide)-b-poly(epsilon-caprolactone) (PLLA-PCL) was successfully achieved by using different crystalline substrates including benzoic acid (BA) and hexamethylbenzene, (HMB), whereas spherulitic crystalline texture was obtained on amorphous substrates. Crystallization-induced orientation of PLLA-PCL microstructures is attributed to directional crystallization of eutectic type between crystalline PLLA and substrate, regardless of microphase separation. Surprisingly, a flat-on crystalline morphology (i.e., with the chain axis normal to the substrate) was obtained, as evidenced by single-crystal-like [001] zonal electron diffraction (ED). By contrast, an edge-on crystalline morphology (i.e., with the chain axis parallel to the substrate) was observed for PLLA homopolymer under the same condition. The crystallographic organization of PLLA-PCL microdomains as observed by transmission electron microscopy, ED, and scanning probe microscopy suggests that the growth direction of PLLA crystals is along the alpha-axis direction, which suggests that the growth direction of PLLA crystals is along the alpha-axis direction that corresponds well with the preferential growth direction (i.e., b-axis direction) of BA or HMB crystals. As a result, the phase-separated lamellar morphology consists of an alternation of a flat-on layer of PLLA lamellae and of an amorphous layer of PLLA and PCL components.en_US
dc.language.isoen_USzh_TW
dc.relationMacromoleculesen_US
dc.relation.ispartofseriesMacromolecules, Volume 36, Issue 24, Page(s) 9085-9092.en_US
dc.relation.urihttp://dx.doi.org/10.1021/ma0347868en_US
dc.subjectin-vitro degradationen_US
dc.subjectorder-disorder transitionen_US
dc.subjectto-lamellar transitionen_US
dc.subjectepitaxial crystallizationen_US
dc.subjectthin-filmsen_US
dc.subjectmicrodomain orientationen_US
dc.subjectblock-copolymersen_US
dc.subjectaliphatic polyestersen_US
dc.subjectelectric-fieldsen_US
dc.subjectbenzoic-aciden_US
dc.titleCrystallization-induced orientation for microstructures of poly(L-lactide)-b-poly(epsilon-caprolactone) diblock copolymersen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1021/ma0347868zh_TW
item.languageiso639-1en_US-
item.openairetypeJournal Article-
item.cerifentitytypePublications-
item.grantfulltextnone-
item.fulltextno fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
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