Selective Localization of Nanofillers: Effect on Morphology and Crystallization of PLA/PCL Blends

Adding nanofillers to PLA/PCL blends to change their surface and interface properties can improve their phase morphology. Here the selective localization of CNTs and organoclays as the third component in the blend is studied. It is found that clay is selectively localized in the PLA phase and at the...

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Bibliographic Details
Published in:	Macromolecular chemistry and physics Vol. 212; no. 6; pp. 613 - 626
Main Authors:	Wu, Defeng, Lin, Dongpo, Zhang, Jie, Zhou, Weidong, Zhang, Ming, Zhang, Yisheng, Wang, Dongmei, Lin, Bilei
Format:	Journal Article
Language:	English
Published:	Weinheim WILEY-VCH Verlag 15-03-2011 WILEY‐VCH Verlag Wiley
Subjects:	Applied sciences Blends carbon nanotubes clay Composites Exact sciences and technology Forms of application and semi-finished materials Localization Morphology Nanocomposites Nanomaterials Nanostructure poly(ε-caprolactone) polylactide Polymer blends Polymer industry, paints, wood Position (location) Technology of polymers Organic clay Polymer blends Carbon nanotubes Experimental study Lactone polymer Heterogeneous mixture Transformation temperature clay Functionalized nanotube Heat of transformation Melt crystallization Lactic acid polymer poly(ε-caprolactone) Multiwalled nanotube Morphology Nanocomposite Phase partition Kinetics polylactide Polycaprolactone Filler Isothermal crystallization Comparative study
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Summary:	Adding nanofillers to PLA/PCL blends to change their surface and interface properties can improve their phase morphology. Here the selective localization of CNTs and organoclays as the third component in the blend is studied. It is found that clay is selectively localized in the PLA phase and at the phase interface whereas CNTs are mainly found in the PCL phase and at the phase interface. With a reduced viscosity ratio of the blend matrices, the CNTs change their preferred localization from PCL to PLA. The effects of the different selective localization of clay and CNTs on the morphologies are studied. In addition, the crystallization behavior of ternary systems also shows a strong dependence on the selective localization of nanofillers. In biodegradable PLA/PCL immiscible blend systems, clay and carbon nanotubes present different selective localization behaviors. The former is selectively localized in the PLA phase and phase interface, while the latter is mainly dispersed in the PCL phase and phase interface. These two selective localizations can be used as powerful tools to design phase morphology of the matrix blends and to control crystallization of the component polymers.
Bibliography:	Natural Science Foundation of Jiangsu Province - No. BK2010040 Postdoctoral Science Foundation of China - No. 20080441078, 200902532 istex:8A975F4AA8BE56EBE53943B0F7C97F6471D96C2B National Natural Science Foundation of China - No. 50803052 ark:/67375/WNG-W2G5K0C7-1 ArticleID:MACP201000579 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1022-1352 1521-3935 1521-3935
DOI:	10.1002/macp.201000579