서지주요정보
환형올레핀 공중합체와 스틸렌계 블록 공중합체 블렌드의 충격강도 및 광학적 특성에 관한 연구 = Impact strength and optical properties of cyclic olefin copolymer/styrenic block copolymer blends
서명 / 저자 환형올레핀 공중합체와 스틸렌계 블록 공중합체 블렌드의 충격강도 및 광학적 특성에 관한 연구 = Impact strength and optical properties of cyclic olefin copolymer/styrenic block copolymer blends / 박지용.
저자명 박지용 ; Park, Ji-Yong
발행사항 [대전 : 한국과학기술원, 2004].
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소장정보

등록번호

8015129

소장위치/청구기호

학술문화관(문화관) 보존서고

MCBE 04016

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초록정보

Cyclic olefin copolymer(COC) is one of the new class of polymers based on cyclic olefin monomer and ethylene. Because of the bulky cyclic olefin units randomly or alternately attached to the polymer backbone, the copolymer becomes amorphous and shows properties of high glass transition temperature(Tg), optical clarity, low shrinkage, low moisture absorption, and low birefringence. Although the COC has many desirable properties as a potential engineering plastic, the disadvantage of low impact strength of COC remains still problematic. Therefore, an improvement of impact strength of COC is very essential to expand its applications. Also, it has been demanded to further improve the impact strength with maintaining an excellent transparency of COC. In this study, the toughening of COC(ethylene-trtracyclododecene copolymer) with styrenic elastomer while maintaining its optical transparency was investigated. SEBS(Polystyrene-block-poly(ethylene-co-butylene)-block-polystyrene) having 58% styrene block is selected as a impact modifier because of its closely matched refractive index to COC. It is found that the impact strength of COC/SEBS blends strongly depends on the dispersed particle size and SEBS content. When the SEBS content is 10wt, the impact strength of COC/SEBS increases with decreasing the particle size and shows a sharp transition at about 0.5μm particle size. And it is observed that the optical transparency of COC/SEBS blends is strongly influenced by the refractive index difference between SEBS and COC. The optical transparency of COC/SEBS blends is improved as the relative refractive index approaches to unity. The control of the refractive index of SEBS by adding the polymer which has a miscibility with each segment in SEBS is studied. The refractive index of the dispersed SEBS can be adjusted by adding a PS and EPR and it leads to more closely matched refractive index to COC. From the morphological observation, the multi lamella vesicles are observed in the cast films prepared by solution blending due to the lamella microstructure of SEBS itself.

서지기타정보

서지기타정보
청구기호 {MCBE 04016
형태사항 vii, 57 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ji-Yong Park
지도교수의 한글표기 : 김성철
지도교수의 영문표기 : Sung-Chul Kim
학위논문 학위논문(석사) - 한국과학기술원 : 생명화학공학과,
서지주기 참고문헌 : p. 56-57
주제 환형올레핀 공중합체
스틸렌계 블록 공중합체
충격강도
광학적특성
CYCLIC OLEFIN COPOLYMER
STYRENIC BLOCK COPOLYMER
IMPACT STRENGTH
OPTICAL PROPERTIES
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