지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김병규
- 발행연도
- 2016
- 저작권
- 부산대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
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Rigid polyurethane foam (RPUF)/glass fiber and RPUF/glass fiber/silica composites have been fabricated from glass fiber, silica, polymeric 4,4’-di-phenylmethane diisocyanate (PMDI) and polypropylene glycols (PPG) using HFC 365mfc as blowing agent. Foam formation kinetics, morphology, thermal conductivity, glass transition temperature, decomposition temperatures as well as the mechanical strengths of the foam have been studied. With the addition and increasing amount of glass fiber, cream time, rise time, gel time, tack free time, density, compression strength, thermal monotonically increased while the glass transition temperature showed a maximum at 2%s. At constant glass fiber content (2%), addition of silica further increased the process times, density and compression strength while the Tg and thermal decomposition temperature showed a maximum at 3% silica. The thermal conductivity (k) of RFUF/glass mat decreased with the addition of silica up to 3%, where the k value was even lower than the virgin RPUF. However, beyond the content k value increased. Overall, the variation of k value with silica content showed identical tendency with cell size and closed cell content.
목차
Chapter 1. Glass Fiber and Silica Reinforced Rigid Polyurethane Foams 11.1 Abstract 11.2 Introduction 21.3 Experimental 31.3.1 Raw Materials 31.3.2 Isocyanate modification of silica particles 41.3.3 Preparation of samples 41.3.4 Characterizations 51.4 Results and discussion. 61.4.1 FT-IR spectra. 61.4.2 Kinetics of foam formation. 71.4.3 Density 81.4.4 Thermal properties 81.4.5 Compression strength 81.4.6 RPUF/glass mat/silica ternary composites 91.5 Conclusions 121.6 References. 14
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