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자료유형
학술저널
저자정보
Chun, Byoung-Chul (Department of Polymer Engineering, The University of Suwon) Cho, Tae-Keun (Department of Polymer Engineering, The University of Suwon) Chong, Mi-Hwa (Department of Polymer Engineering, The University of Suwon) Chung, Yong-Chan (Department of Chemistry, The University of Suwon) Martin, David (Department of Materials Science and Engineering, The University of Michigan) Chen, Jihua (Department of Materials Science and Engineering, The University of Michigan) Park, Jong-Shin (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University)
저널정보
한국섬유공학회 Fibers and Polymers Fibers and polymers 제8권 제1호
발행연도
2007.1
수록면
43 - 49 (7page)

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Nanocomposite of polyurethane(PU), Nylon66(nylon), and montmorillonite(MMT) was prepared by a twin screw extruder, and the dispersion of MMT and the mechanical properties of the nanocomposite were analyzed. Dimethyl hydrogenated tallow 2-ethylhexyl ammonium modified Cloisite 25A(C25A) and methyl tallow bis-2-hydroxyethyl ammonium modified Cloisite 30B(C30B) were used as MMT. XRD and TEM analysis indicated that the continuous melt mixing by a twin screw extruder was effective in MMT dispersion. C30B having hydroxyl group on its surface has better dispersion than C25A in the PU/nylon matrix. Maximum stress and strain at break were the maximum at 1 wt% MMT regardless of matrix composition, and decreased at higher MMT content. Best MMT dispersion was also observed at 1 wt% MMT for the entire matrix composition. Aggregation of MMT occurred at MMT content higher than 1 wt%. Nylon addition also induced the aggregation of MMT because of the high polarity of nylon surface. Dispersion of MMT was very important in improving the mechanical properties of PU/nylon nanocomposite.

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