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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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Recently, various nanoparticles have been used filler in polymer matrices. The particles of nano size are whether high or not cross-link density in polymer affects the thermal and mechanical properties of one. The properties change as a result of chemical reactions between the nanoparticles and the surface of the polymer. There are two models for nanocomposites: "repulsive interaction" and "attractive interaction" between the nanoparticles and matrix. In this study, the variation in the curing mechanism was examined when nano-size TiO₂ was dispersed into an epoxy (Bisphendol A, YD-128) with different curing agents. The results of this study showed that the exothermic temperature and Tg in the case of the nanoparticles used (Jeffamine) (D-180) at room temperature were reduced by an increase in the TiO₂ contents because of the "repulsive interaction" between the nanoparticles and the matrix. The tensile strengths were increased by increasing amounts of TiO₂ until 3 wt% because of a dispersion strengthening effect caused by the nanoparticles, because of the repulsive interaction. However, such tensile properties decreased at 5 wt% of TiO₂ because the TiO₂ was agglomerated in the epoxy. In contrast, in the case of the nanoparticles that used NMA and BDMA, the exothermic temperature and Tg tended to rise with increasing amounts of TiO₂ as a result of the "attractive interaction". This was because the same amounts of TiO₂ were well dispersed in the epoxy. The tensile strength decreased with an increase in the TiO₂ contents. In the general attractive interaction model, however, the cross-link density was higher, and tensile strength tended to increase. Therefore, for the nanoparticles that used NMA, it was difficult to conclude that the result was caused by the "attractive model."
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ABSTRACT
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2. 재료 및 실험방법
3. 결과 및 고찰
4. 결론
References
참고문헌 (13)
참고문헌 신청
1. [학술지(정기간행물)] - Chatterjee, A. / 2008 / Fabrication and Characterization of TiO2-epoxy Nanocomposites / Materials Science and Engineering A 487 : 574 ~ 585
2. [학술지(정기간행물)] - Chen, X. / 2007 / Titaninum Dioxide Nanomaterials / Chemical Reviews 107 (7) : 2891 ~ 2959
3. [학술지(정기간행물)] - Ciprari, D. / 2006 / Characterization of Polymer Nanocomposite Interphase and Its Impact on Mechanical Properties / Macromolecules 39 : 6565 ~ 6573
4. [학술지(정기간행물)] - de Pablo, J. J. / 2005 / Local Mechanical Properties of Polymeric Nanocomposites / Physical review E 72 (3) : 791 ~ 801
5. [학술지(정기간행물)] - Bavykin, D. V. / 2006 / Protonated Titanates and TiO2 Nanostructured Materials : Synthesis, Properties and Applications / Advanced Materials 18 : 2807 ~ 2824
2. [학술지(정기간행물)] - Chen, X. / 2007 / Titaninum Dioxide Nanomaterials / Chemical Reviews 107 (7) : 2891 ~ 2959
3. [학술지(정기간행물)] - Ciprari, D. / 2006 / Characterization of Polymer Nanocomposite Interphase and Its Impact on Mechanical Properties / Macromolecules 39 : 6565 ~ 6573
4. [학술지(정기간행물)] - de Pablo, J. J. / 2005 / Local Mechanical Properties of Polymeric Nanocomposites / Physical review E 72 (3) : 791 ~ 801
5. [학술지(정기간행물)] - Bavykin, D. V. / 2006 / Protonated Titanates and TiO2 Nanostructured Materials : Synthesis, Properties and Applications / Advanced Materials 18 : 2807 ~ 2824
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UCI(KEPA) : I410-ECN-0101-2014-550-002762985