caa a22 4500 445384727 CHVBK 20180317143028.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10924-010-0233-9 doi (NATIONALLICENCE)springer-10.1007/s10924-010-0233-9 Effects of Alkali Treatment on the Properties of Short Flax Fiber-Poly(Lactic Acid) Eco-Composites [Elektronische Daten] [Merlin Aydın, Hale Tozlu, Sebnem Kemaloglu, Ayse Aytac, Guralp Ozkoc] In this study, the influence of alkali (NaOH) treatment on the mechanical, thermal and morphological properties of eco-composites of short flax fiber/poly(lactic acid) (PLA) was investigated. SEM analysis conducted on alkali treated flax fibers showed that the packed structure of the fibrils was deformed by the removal non-cellulosic materials. The fibrils were separated from each other and the surface roughness of the alkali treated flax fibers was improved. The mechanical tests indicated that the modulus of the untreated fiber/PLA composites was higher than that of PLA; on the other hand the modulus of alkali treated flax fiber/PLA was lower than PLA. Thermal properties of the PLA in the treated flax fiber composites were also affected. Tg values of treated flax fiber composites were lowered by nearly 10°C for 10% NaOH treatment and 15°C for 30% NaOH treatment. A bimodal melting behavior was observed for treated fiber composites different than both of neat PLA and untreated fiber composites. Furthermore, wide angle X-ray diffraction analysis showed that the crystalline structure of cellulose of flax fibers changed from cellulose-I structure to cellulose-II. Springer Science+Business Media, LLC, 2010 Eco-composites nationallicence Poly(lactic acid) nationallicence Alkali treatment nationallicence Flax fiber nationallicence Morphology nationallicence Aydın Merlin Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut Tozlu Hale Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut Kemaloglu Sebnem Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut Aytac Ayse Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut Ozkoc Guralp Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 11-17 1566-2543 19:1<11 2011 19 10924 https://doi.org/10.1007/s10924-010-0233-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-010-0233-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Aydın Merlin Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut NATIONALLICENCE 700 1- Tozlu Hale Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut NATIONALLICENCE 700 1- Kemaloglu Sebnem Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut NATIONALLICENCE 700 1- Aytac Ayse Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut NATIONALLICENCE 700 1- Ozkoc Guralp Department of Chemical Engineering, Kocaeli University, 41380, Kocaeli, Turkey aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 11-17 1566-2543 19:1<11 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer