| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.165 |
| 발표분야 | 고분자 구조 및 물성 |
| 제목 | Effect of Surface Treatment of Clay on Thermal Properties of Vinyl Ester Nanocomposites |
| 초록 | Nanocomposites are a new class of composites with ultrafine phase dimension typically in the nanometer range. They show remarkable improvement in mechanical, thermal, and physical properties when compared with pristine polymer. In this work, the layered silicates-reinforced nanocomposites were prepared by swelling an organoclay in vinyl ester (VE) with subsequent in situ polymerization. The intercalated organoclay are prepared by ion-exchange reaction of octadecylammonium chloride with Na+-montmorillorite (MMT) in H2O solution. The surface of organoclay is treated with nitric acid solution. The contents of oganoclay were varied from 0.5 to 2 wt% and the dicumyl peroxide was used as a free-radical initiator. To examine the molecular conformation of the intercalated chains and interlayer structure, FT-IR spectroscopy and X-ray diffraction were used. Thermal properties of the nanocomposites were investigated by using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Fig. 1 shows the FT-IR spectra of C18-MMT before and after nitric acid treatment. A new OH peak at 1357 cm-1 is appeared after acid treatment, which is due to formation of hydroxy groups at the clay surfaces. The addition of 1 wt% A-C18-MMT significantly led to an improving the thermal stabilities of the nanocomposites. This can be attributed to the intercalation of the VE chains inside the organoclay gallery played a major role in enhancing of interactions between the hydroxy groups of the silicate surfaces and the VE chains in the nanocomposites. Fig. 1. FT-IR spectra of C18-MMT before and after acid treatment. |
| 저자 | 김범용, 박수진 |
| 소속 | 한국화학(연) |
| 키워드 | Surface treatment; Vinyl ester; Nanocomposites |
