| 학회 | 한국화학공학회 |
| 학술대회 | 2003년 봄 (04/25 ~ 04/26, 순천대학교) |
| 권호 | 9권 1호, p.5 |
| 발표분야 | 고분자 |
| 제목 | Thermorheological Behavior of Polypropylene Varying the Number of Extrusion Time |
| 초록 | Rheological properties of polypropylene (PP) varying the number of extrusion were studied by advanced rheometric expansion system (ARES). In the study of the rheology around the melting point of PP, the storage modulus (G’) and loss modulus (G”) were decreased as increasing the number of extrusion time. From the relaxation spectrum studies, the extruded 2 times PP shows another relaxation mode corresponding the gelation caused by shear induced crystallization. The difference of relaxation exponents between the storage modulus (G’) and loss modulus (G”) was increased as increasing the number of extrusion time. According to the gelation equation of Winter and Chambon, the relaxation exponents results was consistent with the relaxation spectrum results. From the results rheology, relaxation spectrum and gelation behavior, it is suggested that the extrusion effect of PP is sensitively shown in the rheology around the melting point of PP. 감사의 글: 본 연구는 한국과학재단 (KOSEF)에서 지정한 우수연구센터 (ERC)인 유변연구센터 (Applied Rheology Center)의 연구지원에 의해 수행되었습니다. |
| 저자 | 승유택, 서원진, 신민철, 김우년 |
| 소속 | 고려대 |
| 키워드 | extrusion; shear-induced crstallization; gelation |
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| VOD | VOD 보기 |
