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Non-isothermal crystallization behavior of PLA/acetylated cellulose nanocrystal/silica nanocomposites

Title
Non-isothermal crystallization behavior of PLA/acetylated cellulose nanocrystal/silica nanocomposites
Author
김성훈
Keywords
poly(lactide); polymer nanocomposites; cellulose nanocrystal; silica; non-isothermal crystallization
Issue Date
2016-01
Publisher
WILEY-BLACKWELL
Citation
POLYMER INTERNATIONAL, v. 65, NO 1, Page. 115-124
Abstract
Poly(lactide) (PLA)/acetylated cellulose nanocrystals (ACN)/silica nanocomposites were prepared by solution casting. Surface modification of cellulose nanocrystal (CNC) was performed to prepare the ACN. The ACN and silica were expected to act as a mechanical reinforcement of PLA and a nucleation agent, respectively, to increase the crystallization rate. Introduction of acetyl groups on the surface of the cellulose nanocrystals was confirmed by Fourier transform infrared spectroscopy. A combined Avrami-Ozawa analysis described the non-isothermal crystallization effectively. The activation energy for the crystallization was calculated from the Kissinger and the Takhor equations. Spherulite growth behavior was observed by polarizing optical microscopeandspherulitegrowthrate, thenumberof spherulite versus crystallization timehave investigated. Thedevelopment of PLA crystals and the thermal stability had a tendency to improvewith increasing silica content. Increased tensile strengthwas observed due to the reinforcement effect of ACN and themorphology of the nanocomposites was investigated. (C) 2015 Society of Chemical Industry
URI
http://onlinelibrary.wiley.com/doi/10.1002/pi.5038/abstract;jsessionid=DFE5CFC9F786E175BBC7568E0AB29681.f03t03http://hdl.handle.net/20.500.11754/31430
ISSN
0959-8103; 1097-0126
DOI
10.1002/pi.5038
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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