서지주요정보
PMMA 입체 복합체의 형성과 그 막의 물성에 관한 연구 = A study on the formation of stereocomplex of tactic PMMA and its membranological properties
서명 / 저자 PMMA 입체 복합체의 형성과 그 막의 물성에 관한 연구 = A study on the formation of stereocomplex of tactic PMMA and its membranological properties / 이봉근.
저자명 이봉근 ; Yi, Bong-Geun
발행사항 [서울 : 한국과학기술원, 1984].
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소장정보

등록번호

4102759

소장위치/청구기호

학술문화관(문화관) 보존서고

MCPE 8413

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초록정보

A streocomplex membrane of isotactic and syndiotactic PMMA was prepared by mixing isotactic and syndiotactic resins synthesized separately at different conditions. The isotactic PMMA was polymerized anionically with Grignard reagent at -30℃ and the syndiotactic PMMA was polymerized radically in bulk by thermal and photochemical initiation at -50,0,25,80℃. The tacticity was measured by 60MHz NMR and the molecular weight was measured by viscometry in chloroform solution at 25℃. Dope solution was formed by dissolving two tactic PMMAs in DMSO, which showed the thermoreversible sol-gel phase transition phenomenon. The gel melting behavior was observed by DSC to see the effects of the tacticity, polymer concentration in the dope the tactic polymer ratio (isotactic/syndiotactic), and the molecular weight. The time and temperature dependence of the gelation process was also observed and the gelation kinetic equation was obtained in Avrami form. The effects of the same process parameters on the membranological properties were also observed from the dialysis and ultrafiltration test. The water permeabilitydecreased as the degree of stereocomplex was increased but the solute permeability did not show any dependence on the streocomplex formation. Therefore, PMMA membranes which had the same solute permeabilities could be made to have different permeabilities. The PMMA membranes showed higher water permeabilities than the cellulose membranes because of its hydrophobicity although both membranes showed similar urea permeabilities. They showed higher solute permeabilities of the middle molecular weight substances, which is a good advantage in the biomedical application.

서지기타정보

서지기타정보
청구기호 {MCPE 8413
형태사항 [iv], 82 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Bong-Geun Yi
지도교수의 한글표기 : 김성철
지도교수의 영문표기 : Sung-Chul kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 72-75
주제 Polymers.
물리적 성질. --과학기술용어시소러스
고분자. --과학기술용어시소러스
Matter --Properties.
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