서지주요정보
열방성 액정분자가 폴리에틸렌테레프탈레이트의 결정화 속도에 미치는 영향 = The effect of thermotropic liquid crystalline polymer on the crystallization kinetics of poly (ethylene terephthalate)
서명 / 저자 열방성 액정분자가 폴리에틸렌테레프탈레이트의 결정화 속도에 미치는 영향 = The effect of thermotropic liquid crystalline polymer on the crystallization kinetics of poly (ethylene terephthalate) / 이민희.
저자명 이민희 ; Lee, Min-Hee
발행사항 [서울 : 한국과학기술원, 1989].
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소장정보

등록번호

4105538

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 8919

SMS전송

도서상태

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반납예정일

초록정보

Crystallization kinetics and morphology of Poly (ethyleneterephthalate) (PET) containing thermotropic liquid crystalline polyester (LCP) were studied by Differential scanning calorimetry (DSC), Polarized optical microscopy, Scanning electron microscopy and Small-angle light scattering (SALS). Thermotropic liquid crystalline polyester were used to remedy defects of organic and inorganic nucleating agents. Molecular weight of thermotropic polyester was controlled by varying the stoichiometric ratio of reactants. The compositions of thermotropic polyester were fixed at 0.5 and 1.0 weight percent and isothermal crystallization experiments was carried out over the temperature range from 170℃ to 225℃. The half-time of crystallization was decreased by adding liquid crystalline polyester. Because PET with LCP crystallize much faster than pure PET. And high molecular weigh thermotropic polyester had a superior nucleating effectiveness than that of low molecular weight polyester. The crystallization isotherm of pure PET and PET/LCP blend could be characterized with Avrami exponents ranging from 2.64 to 3.60 which suggested the spherical growth of crystalline structure on constant nucleation and sporadic nucleation. Morphology observation by using Polarized optical microscopy and Small-angle light scattering showed that the crystalline structure was spherulite in all case. The size of spherulites was decreased and size distribution was narrowed by adding the thermotropic polyester.

서지기타정보

서지기타정보
청구기호 {MCE 8919
형태사항 ix, 61 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Min-Hee Lee
지도교수의 한글표기 : 정인재
지도교수의 영문표기 : In-Jae Chung
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 59-61
주제 Morphology.
고분자 액정. --과학기술용어시소러스
표면 성질. --과학기술용어시소러스
Polymer liquid crystals.
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