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논문 기본 정보

자료유형
학술저널
저자정보
Kim, Hyung-Su (Applied Rheology Center, Department of Chemical Engineering, Dankook University) Lee, Hoo-Seok (Applied Rheology Center, Department of Chemical and Biomolecular Engineering, Sogang University) Lee, Jae-Wook (Applied Rheology Center, Department of Chemical and Biomolecular Engineering, Sogang University)
저널정보
한국유변학회 Korea-Australia rheology journal Korea-Australia rheology journal 제19권 제1호
발행연도
2007.1
수록면
1 - 5 (5page)

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By combining ultrasonic energy which is essential for the chain scission of polymer molecules and a multifunctional agent (MFA) having double bonds at its ends, we were able to modify the molecular structure of polycarbonate (PC) from linear to a branched structure during melt processing. The three double bonds in chain ends of MFA were expected to act as sites for trapping macroradicals of PC during the course of ultrasound-assisted mixing process. The transformation of molecular structure of PC was confirmed by the measurements of rheological properties of the modified PC. After the ultrasonic irradiation of PC together with MFA, increase in complex viscosities and shear-thinning behavior were observed. The Cole-Cole plot and measurement of extensional viscosities revealed the characteristic features of branched structure with well-defined extensional behavior which is comparable to that of a commercial branched PC.

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