| 학회 |
한국고분자학회 |
| 학술대회 |
2015년 봄 (04/08 ~ 04/10, 대전컨벤션센터) |
| 권호 |
40권 1호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Time-Dependent Structural Evolution of Aromatic Copolyesters |
| 초록 |
The isothermal self-assembly of high-performance poly(1,4-cyclohexyldimethylene-coethylene terephthalate)s (PCETs) enriched with 1,4-cyclohexanedimethanol (CHDM) was investigated for the first time using in-situ synchrotron SAXS measurements and quantitative data analysis. Interestingly, the bulky CHDM units, which assumed a kinked chair conformation, formed lamellar crystals. The self-assembly process was governed by a nucleation and growth mechanism that depended on the degree of supercooling. Isothermal self-assembly occurred through a four-regime process. The structural evolution was driven mainly by a primary crystallization process, which contributed to crystal layer thickening, and in part by a secondary crystallization process during the later stages, which did not contribute to crystal layer thickness, to produce a lamellar structure. This study also suggests that copolymers having a minor EG unit content tend to exclude the EG units from the formation of lamellar crystals. |
| 저자 |
김창섭1, 김영용2, 허규영3, 진경식4, 김제한4, 정성민1, 권경호3, 김종현3, 위동우1, 이진석3, 송성진3, 이종찬3, 김용진1, 이호열3, Brian J. Ree3, 윤현경3, 이문호3
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| 소속 |
1포항공대 첨단재료과학부, 2포항공대 첨단재료화학부, 3포항공대 화학과, 4포항가속기(연) |
| 키워드 |
copolyesters; crystallizaion; Time-dependent; synchrotron
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| E-Mail |
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