서지주요정보
불포화 폴리에스터/폴리우레탄 IPN 구조를 가진 복합재료의 기계적 성질과 저수축 특성 = Mechanical properties and low-profile characteristic of composites with unsaturated polyester/polyurethane IPN structure
서명 / 저자 불포화 폴리에스터/폴리우레탄 IPN 구조를 가진 복합재료의 기계적 성질과 저수축 특성 = Mechanical properties and low-profile characteristic of composites with unsaturated polyester/polyurethane IPN structure / 여운길.
저자명 여운길 ; Yeo, Un-Gil
발행사항 [대전 : 한국과학기술원, 1990].
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소장정보

등록번호

8000903

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 9014

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The mechanical properties and low-profile characteristic of unsaturated polyester/polyurethane (UPE-PU) interpeneatrating polymer network (IPN) materials as the matrix of fiber-reinforced composites were studied for application of sheet molding compound (SMC) process. The molded parts were prepared by compression molding at 130°C under 35atm pressure. The mechanical properties were tested according to ASTM procedure and the low-profile characteristic was obserbed by taking the photographs of the surface lines of the molded part observed by microscope (x75). Improved impact strength was observed with increasing the content of polyurethane and lowering the crosslink density of the polyurethane crosslinked site($\overline{Mc}$), but these gave poor tensile strength of the composite. Polyurethane content of 20wt% with $\overline{Mc}$ of 2840 was observed to be the optimum condition of impact modifier with increase of the impact strength (22%) with slight decrease of the tensile strength (13%). Polyurethane using PTMG(Poly (tetramethylene ether glycol)) showed better impact strength than using PPG (Polypropylene glycol). The increase of the content and $\overline{Mc}$ of polyurethane improved the low-profile characteristic of the IPN matrices. But, the differences of the low-profile characteristic of polyurethane contents using PTMG or PPG were not observed.

서지기타정보

서지기타정보
청구기호 {MCE 9014
형태사항 [iv], 53 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Un-Gil Yeo
지도교수의 한글표기 : 김성철
지도교수의 영문표기 : Sung-Chul Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 51-53
주제 Material testing laboratories.
중합체. --과학기술용어시소러스
기계적 성질. --과학기술용어시소러스
Polymer network.
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