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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 20 - 25 (6page)
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The effect of the isocyanate index (NCO index) on the particle size and particle size distribution of a waterborne polyurethane dispersion (WPUD) with polycarbonate-diol was determined. The WPUDs were prepared using a conventional acetone process with polycarbonate-polyol (Mn = 2028), 4,4'-methylenebis(cyclohexyl isocyanate) (H12MDI), 2,2-bis(hydroxymethyl) propionic acid (DMPA), and dibutyltin dilaurate catalyst. At NCO index values below 1.5, the number average particle diameter of the WPUDs significantly increased with the NCO index, whereas the particle diameter slightly varied at higher NCO indexes. The dependency of the WPUD viscosity on the NCO index exhibited similar behavior to that of the particle size. The relative values of the full width at half maximum of the WPUD particle distribution curves at various NCO indexes were not influenced by the NCO index.
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참고문헌 (28)
참고문헌 신청
N. D. Hann / 1977 / Effects of lithium bromide on the gel-permeation chromatography of polyester-based polyurethanes in dimethylformamide / J. Polym. Sci. : Polym. Chem. Ed 15:1331
U. Khan / 2010 / Development of stiff, strong, yet tough composites by the addition of solvent exfoliated graphene to polyurethane / Carbon 48:4035
M. Kiremitci / 1990 / Structural and cellular characterization of solvent-casted polyurethane membranes / Clin. Mater 6:227
L. Bao / 2006 / Synthesis and properties of waterborne polyurethane dispersions with ions in the soft segments / J. Polym. Res 13:507
J. Y. Jang / 2002 / Effect of process variables on molecular weight and mechanical properties of water-based polyurethane dispersion / Colloids. Surf. A Physicochem. Eng. Asp 196:135
U. Khan / 2010 / Development of stiff, strong, yet tough composites by the addition of solvent exfoliated graphene to polyurethane / Carbon 48:4035
M. Kiremitci / 1990 / Structural and cellular characterization of solvent-casted polyurethane membranes / Clin. Mater 6:227
L. Bao / 2006 / Synthesis and properties of waterborne polyurethane dispersions with ions in the soft segments / J. Polym. Res 13:507
J. Y. Jang / 2002 / Effect of process variables on molecular weight and mechanical properties of water-based polyurethane dispersion / Colloids. Surf. A Physicochem. Eng. Asp 196:135
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