서지주요정보
셀룰로오즈-NMMO/$H_2O$ 계의 유변학적 특성 = Rheological roperties of cellulose-NMMO/$H_2O$ system
서명 / 저자 셀룰로오즈-NMMO/$H_2O$ 계의 유변학적 특성 = Rheological roperties of cellulose-NMMO/$H_2O$ system / 신원주.
저자명 신원주 ; Shin, Won-Ju
발행사항 [대전 : 한국과학기술원, 1998].
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소장정보

등록번호

8008773

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 98020

SMS전송

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초록정보

The cellulose solutions of various concentrations (5-25wt%) were prepared by mixing cellulose with $NMMO/H_2O$ solvents. The mole ratio of water to NMMO was fixed at 0.8. Propyl-gallate was used as antioxidant to prevent the degradation of cellulose. We could observe the anisotropic phase for the over 20wt% concentration of cellulose solution by PLM. This anisotropic phase could be observed better for the highly sheared sample. The anisotropic-isotropic transition temperature and concentration were measured as common for thermotropic or lyotropic polymer using capillary rheometer under the high shear rate. The transition temperature was between 96℃ and 98℃ and the transition concentration was about 23wt%. This anisotropic-isotropic transition appeared more clearly in the steady mode measurement as compared to dynamic mode. The time-temperature-superposition rule could not be applied to the highly concentrated cellulose solutions with anisotropic phase. But for the solutions of relatively low concentrations in isotropic phase, the time-temperature-superposition rule could be well applied.

서지기타정보

서지기타정보
청구기호 {MCHE 98020
형태사항 vii, 49 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Won-Ju Shin
지도교수의 한글표기 : 정인재
지도교수의 영문표기 : In-Jae Chung
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 46-49
주제 셀룰로오즈
NMMO/$H_2O$
비등방상
전이
유변학적 물성
시간-온도 중첩원리
Cellulose
NMMO/$H_2O$
Anisotropic phase
Transition
Rheological properties
Time-Temperture superposition rule
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