| 학회 |
한국고분자학회 |
| 학술대회 |
2003년 가을 (10/10 ~ 10/11, 부경대학교) |
| 권호 |
28권 2호, p.325 |
| 발표분야 |
고분자 구조 및 물성 |
| 제목 |
Thermodynamic Parameters of Poly(lactic acid)/Dialkyl Phthalate Systems |
| 초록 |
Thermodynamic parameter of binary mixture plays an important role to understand the interaction between two components and the phase transition behavior. Two stereoisomers of poly(lactic acid) (PLA), poly(DL-lactic acid) (PDLLA) and poly(L-lactic acid) (PLLA), in dialkyl phthalate was investigated to comprehend interaction of two components. A series of dialkyl phthalates were adopted as solvents and the interaction between polymer and solvent was systematically controlled by changing the number of carbon atoms in the alky chain of the phthalates. Based on the phase diagrams of PLA/dialkyl phthalate systems and qualitative understandings of interaction between polymer and dialkyl phthalates, we determine the theta temperature, second virial coefficient and interaction parameter of PLA in a series of dialkyl phthalate systems. Theta temperatures were determined and static light scattering was carried out to obtain second virial coefficients and z-average radii of gyration. Temperature and solvent dependence of interaction parameter was examined quantitatively through Zimm plot of PDLLA/dialkyl phthalate systems. |
| 저자 |
이재성1, 이환광2, 김성철1
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| 소속 |
1한국과학기술원 기능성고분자신소재연구센터, 2청운대 |
| 키워드 |
Poly(lactic acid); Interaction parameter; Theta temperature
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| E-Mail |
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