Crystalline morphology of poly(L-lactic acid) thin films
Li, Haidong; Nie, Wei; Deng, Chao; Chen, Xuesi; Ji, Xiangling
AbstractCrystalline morphologies of spin-coated poly(L-lactic acid) (PLLA) thin films under different conditions are investigated mainly with atomic force microscopy (AFM) technique. When PLLA concentration in chloroform is varied from 0.01 to 1% gradually, disordered structure, rod-shape and larger spheres aggregates are observed in thin films subsequently. Under different annealing temperature, such as at 78, 102, 122 degrees C, respectively, we can find most rod-like crystalline aggregates. Interestingly, we observed that nucleation sites locate at the edge of the holes at the original crystalline stage. Then, these holes developed to form chrysanthemum-like and rods subsequently with annealing time meanwhile the size and the shape of crystalline aggregate are changed. In addition. effect of substrate and solvent on morphology is also discussed. On the other hand, the possible mechanism of crystalline morphology evolution is proposed. (C) 2008 Elsevier Ltd. All rights reserved.
KeywordPoly(L-lactic Acid) Thin Films Afm Crystalline Morphology
Indexed BySCI
WOS IDWOS:000263211400014
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Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorChen, Xuesi
AffiliationChinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Grad Sch, Changchun 130022, Peoples R China
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GB/T 7714
Li, Haidong,Nie, Wei,Deng, Chao,et al. Crystalline morphology of poly(L-lactic acid) thin films[J]. EUROPEAN POLYMER JOURNAL,2009,45(1):123-130.
APA Li, Haidong,Nie, Wei,Deng, Chao,Chen, Xuesi,&Ji, Xiangling.(2009).Crystalline morphology of poly(L-lactic acid) thin films.EUROPEAN POLYMER JOURNAL,45(1),123-130.
MLA Li, Haidong,et al."Crystalline morphology of poly(L-lactic acid) thin films".EUROPEAN POLYMER JOURNAL 45.1(2009):123-130.
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