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논문 기본 정보

자료유형
학술저널
저자정보
김학용 (전북대학교 섬유공학과) 김선호 (삼양사 중앙연구소) 이준희 (삼양사 중앙연구소) 권수한 (충북대학교 화학과)
저널정보
한국섬유공학회 한국섬유공학회지 한국섬유공학회지 제36권 제2호
발행연도
1999.1
수록면
125 - 131 (7page)

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Cyclic oligomers of poly(ethylene terephthalate)(PET) were separated by HPLC and they were analyzed. Pure cyclic trimer used as the standard for calibration was collected and structural analyses were conducted. A calibration curve for the quantification of the cyclic oligomers was obtained with very high confidence. Also an easy and reproducible sample preparation procedure of dissolution and reprecipitation using co-solvent and condition for high resolution HPLC separation were determined. Total amount of cyclic oligomer in melt polymerized PET with intrinsic viscosity(IV) 0.64 was 2.09$\pm$0.08 wt% at 95%-confidence level. The amount of cyclic trimer and tetramer were 1.08$\pm$0.06 wt% and 0.31$\pm$0.01 wt%, respectively. Also the amount of cyclic oligomer decreased with increasing ring size. Total amount of cyclic oligomer in solid state polymerized PET with IV 0.80 was 0.82$\pm$0.04 wt%. The amount of cyclic trimer and tetramer were 0.48$\pm$0.03 wt% and 0.11$\pm$0.01 wt%, respectively. The amount of cyclic oligomer in solid state polymerized PET was drastically decreased since some oligomers were polymerized and low molecular weight oligomers such as cyclic trimer and tetramer were eliminated during solid state polymerization.

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