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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.3
- 수록면
- 40 - 47 (8page)
이용수
초록· 키워드
오류제보하기
As a coating material for loudspeaker dampers, resilient polyurethane/epoxy hybrid resins were synthesized to replace conventional phenol resin and examined the physical properties, which are not only environmentally friendly but also not harmful to human. Five types of polyurethane resins were synthesized in the step-shot method using methylene diisocyanate, three polyols such as poly tetramethylene ether glycol(PTMEG, MW:2000), poly(1,4-buthylene adipate(PBAP, MW:2000), and poly carbonatediol(PCD, MW:2000), and three chain extenders such as ethylene glycol(EG), neopentyl glycol(NPG), and 1,4-buthandiol(1,4-BD). The five types of synthesized polyurethane resins and commercially available bisphenol A type epoxy resin were blended in weight ratios of 90:10, 70:30, and 50:50 to synthesize 15 types of polyurethane/epoxy hybrid resins. Among the polyurethane resins, the one that was synthesized using PCD and 1,4- BD showed excellent tensile strength, 100% modulus, low extension, and relatively high viscosity. Polyurethane/epoxy hybrid resins with higher epoxy resin contents showed better thermal properties and water resistance while those with higher polyurethane contents showed higher flexibility. The polyurethane/epoxy hybrid resin made by blending the polyurethane based on PCD and 1,4-BD with a bisphenol A type epoxy resin in a weight ratio of 70:30 was identified to be the most suitable to be used in speaker dampers.
목차
Abstract
1. 서론
2. 실험
3. 결과 및 고찰
4. 결론
References
참고문헌 (11)
참고문헌 신청
D. S. Choi and S. S. Lee, Experimental Analysis of the Damper of Loudspeaker, The Acoustical Society of Korea, 23(3), 192(2004).
H. R. Yi, S. J. Oh, and S. W. Yoon, Radiation of the Damper of Loudspeaker, The Acoustical Society of Korea, 23(1), 127(2004).
S. G. Choi andK. S. Yoo, AStudy on the Synthesis and Properties of Polyurethane Resin Based on PPG as a Glycol, Elastomer, 35(3), 205(2000).
S. G. Kim, M. J. Li, M. T. Ramesan, and D. S. Lee, Effects of Polyol Types andHard SegmentContents on the Crystallization of Thermoplastic Polyurethanes, Polymer( Korea), 29(2), 140(2005).
S. Y. Yang, H. A. Kim, and S. J. Kim, The Synthesis of One-step Type Hydrophilic Non-porous Polyurethane Resin and the Physical Property of its Coated Fabric for the Garment, Textile Coloration and Finishing, 23(2), 131(2011).
H. R. Yi, S. J. Oh, and S. W. Yoon, Radiation of the Damper of Loudspeaker, The Acoustical Society of Korea, 23(1), 127(2004).
S. G. Choi andK. S. Yoo, AStudy on the Synthesis and Properties of Polyurethane Resin Based on PPG as a Glycol, Elastomer, 35(3), 205(2000).
S. G. Kim, M. J. Li, M. T. Ramesan, and D. S. Lee, Effects of Polyol Types andHard SegmentContents on the Crystallization of Thermoplastic Polyurethanes, Polymer( Korea), 29(2), 140(2005).
S. Y. Yang, H. A. Kim, and S. J. Kim, The Synthesis of One-step Type Hydrophilic Non-porous Polyurethane Resin and the Physical Property of its Coated Fabric for the Garment, Textile Coloration and Finishing, 23(2), 131(2011).
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UCI(KEPA) : I410-ECN-0101-2016-551-002734939