서지주요정보
폴리 (옥시테트라메틸렌) 글리콜-폴리(부틸렌 테레프탈레이트) 블록 공중합체의 합성, 안정화 및 물성에 대한 연구 = Poly(oxytetramethylene) glycol-poly(butylene terephthalate)block copolymer : preparation, stabilization and properties
서명 / 저자 폴리 (옥시테트라메틸렌) 글리콜-폴리(부틸렌 테레프탈레이트) 블록 공중합체의 합성, 안정화 및 물성에 대한 연구 = Poly(oxytetramethylene) glycol-poly(butylene terephthalate)block copolymer : preparation, stabilization and properties / 김상율.
발행사항 [서울 : 한국과학기술원, 1982].
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소장정보

등록번호

4101746

소장위치/청구기호

학술문화관(문화관) 보존서고

MAC 8203

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

Block copolymers composed of poly (oxytetramethylene) glycol (PTMG) and poly (butylene terephthalate) (PBT) were prepared and the effect of PTMG molecular weight on the properties of block copolymer was evaluated. The ability of various antioxidants to provide stabilization of prepared block copolymer against thermooxidative degradation was also investigated. For the polycondensation reaction the optimum temperature was 250℃ and optimum reaction time was 3 hrs with 0.1% level of magnesium acetate and titanium tetrabutoxide. Effect of antioxidants on thermo-oxidative degradation was examined by isothermal thermogravimetric method and by ovenaging test. Change in tensile strength and elongation were followed after oven-aging for certain time intervals. Antioxidants of aromatic amine type were found to be most effective among various types of antioxidants such as phosphorous, sulfur and phenol derivatives. Synergistic effect was observed when some phenolic antioxidants were mixed with phosphorous compounds. Very effective stabilization was obtained by combination of preventive antioxidants with chain-breaking antioxidants. Tensile strength, elongation and melting point were found to increase with the increase in PTMG molecular weight, but glass transition temperature and Young's modulus were rather decreased.

서지기타정보

서지기타정보
청구기호 {MAC 8203
형태사항 [iv], 64 p. : 삽도 ; 28 cm
언어 한국어
일반주기 부록 :Ⅰ, Structural formula of antioxidants empolyed for this study. - Ⅱ, Weight loss (%) of PTNG-PBT block copolymer in the presence of various antioxidants at 250℃ under air stream. - Ⅲ, Weight loss (%) of PTNG-PBT block copolymer in the presence of various antioxidants at 250℃ under air stream
저자명의 영문표기 : Sang-Youl Kim
지도교수의 한글표기 : 조의환
지도교수의 영문표기 : I-Whan Cho
학위논문 학위논문(석사) - 한국과학기술원 : 화학과,
서지주기 참고문헌 : p. 56-58
주제 Antioxidants.
Polymers.
블록 공중합. --과학기술용어시소러스
산화제. --과학기술용어시소러스
고분자. --과학기술용어시소러스
Block copolymers.
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