불포화폴리에스터수지, 천연도료, 엔지니어링 플라스틱 레포트
- 최초 등록일
- 2016.04.26
- 최종 저작일
- 2014.12
- 5페이지/
한컴오피스
- 가격 1,000원
목차
1. 불포화 폴리에스터 수지(Unsaturated Polyester Resin)의 제조 및 FRP에의 적용
2. 천연도료의 제조 및 경화 메커니즘
3. 엔지니어링 플라스틱(EP) 폴리머 5종의 제조 방법
본문내용
1. 불포화 폴리에스터 수지(Unsaturated Polyester Resin)의 제조 및 FRP에의 적용
불포화 폴리에스테르 수지(UPR)은 무색 투명한 열경화성 수지로, 무수 말레인산과 푸마르산 같은 불포화 디카르복시산, 포화 디카르복시산 및 다이올을 반응시켜 제조한다. 다음은 그 제조의 예이다.
A mixture of 1.25 mol Propylene glycol (PG), 0.5 mol Phthalic anhydride (PA), 0.2% p- Toluene sulfonic acid (PTSA) and Xylene as solvent was charged in a three-neck reaction kettle equipped with stirrer, thermometer, nitrogen-gas introducing tube, separator and water condenser. The mixture was mechanically stirred and heated at 1200C under nitrogen gas stream. When reaction mass becomes clear, it was allowed to cool to 800C and then 0.5 mol Maleic anhydride (MA) was added and continues heating at 150-2000C until an acid number of 20 was reached. During esterification reaction, water formed as by product and was continuously removed from the reaction mass as it inhibits the rate of reaction. The Xylene was completely distilled out and reaction product was allowed to cool.
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