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
- 학술저널
- 저자정보
- 발행연도
- 2011.6
- 수록면
- 193 - 198 (6page)
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초록· 키워드
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Polyester was prepared through the esterification reaction between watsepaper liquefied by ethylene glycol and carboxylic acid. Liquefaction was carried out at the previously determined condition of 100 minutes, 160℃, and 3% sulfuric acid, and the hydroxyl value of the liquefied product was 411 mg KOH/g. In order to remove bubbles produced during the curing step, the method to introduce a slight nitrogen stream into reaction vessel and/or the method to preheat a polyester film at 85℃ before curing step were used alone or in combination. But if curing temperature was 130℃, simple method to cure a film for 5 hours at 130℃ without using both methods was found to be most effective. The polyesters prepared with various carboxylic acids showed significant different physical properties, and maleic acid was best among them. Also, the effect of reaction time and temperature, C/H (carboxyl group/hydroxyl group) ratio, and type of additive on the crosslinkage of polyester was investigated. Lithium hydroxide or citric acid as additive was used to enhance the crosslinkage of polyester and citric acid was proved to be much more effective than lithium hydroxide. The effect of reaction temperature on the crosslinkage was marginal, but the crosslinkage decreased above 130℃. The crosslinkage was 86% when the polyester was prepared at an optimum condition such as 130℃ and 15 minutes of reaction condition, 1.5 of C/H ratio, 130℃ and 5 hours of curing condition, and 10% addition of citric acid.
목차
Abstract
1. 서론
2. 재료 및 방법
3. 결과 및 고찰
4. 결론
References
참고문헌 (16)
참고문헌 신청
1. [학술지(정기간행물)] - Sanchez, Q. J / 2008 / Trends in biotechnological production of fuel ethanol from different feedstocks / Bioresour. Technol 99 : 5270 ~ 5295
2. [학술지(정기간행물)] - Shiraishi, N / 1985 / Dissolution of etherified or esterified wood into polyhydric alcohols or bisphenol A and their application in preparing wooden polymeric materials / Mokuzai Gakkaishi 31 : 418 ~ 420
3. [학술지(정기간행물)] - Yao, Y. / 1993 / Combined liquefaction of wood and starch in a polyethylene glycol/glycerin blended solvent / Mokuzai Gakkaishi 39 : 930 ~ 938
4. [학술지(정기간행물)] - Wang, Y. / 2009 / Liquefaction of corn stover using industrial biodiesel glycerol / Int. J. Agric. Biol. Eng 2 : 32 ~ 40
5. [학술지(정기간행물)] - Hae Joong Shin / 2009 / Kinetic Study of Recycled Newspaper Liquefaction in Polyol Solvent / Biotechnology and Bioprocess Engineering 14 (3) : 349 ~ 353
2. [학술지(정기간행물)] - Shiraishi, N / 1985 / Dissolution of etherified or esterified wood into polyhydric alcohols or bisphenol A and their application in preparing wooden polymeric materials / Mokuzai Gakkaishi 31 : 418 ~ 420
3. [학술지(정기간행물)] - Yao, Y. / 1993 / Combined liquefaction of wood and starch in a polyethylene glycol/glycerin blended solvent / Mokuzai Gakkaishi 39 : 930 ~ 938
4. [학술지(정기간행물)] - Wang, Y. / 2009 / Liquefaction of corn stover using industrial biodiesel glycerol / Int. J. Agric. Biol. Eng 2 : 32 ~ 40
5. [학술지(정기간행물)] - Hae Joong Shin / 2009 / Kinetic Study of Recycled Newspaper Liquefaction in Polyol Solvent / Biotechnology and Bioprocess Engineering 14 (3) : 349 ~ 353
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