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  • 02월 20일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제113회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Small angle neutron scattering study of temperature and time dependent polymer behavior

2014년 2월 13일 16시 46분 11초
POLY.P-78 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 16일 (수요일) 16:00~19:00
저자 및
유정주, 이형일1, 손대원*
한양대학교 화학과, Korea
1울산대학교 화학과, Korea
Poly(2-((3-(1-(2-(dimethylamino)ethyl)-1H-1,2,3-triazol-4-yl)propanoyl)oxy)ethyl methacrylate), P1, which has great attention due to a lot of applications for biochemistry and bio-engineering, was prepared and characterized depending on temperature, pH and time. P1 solution properties were probed with small angle neutron scattering (SANS) and dynamic light scattering (DLS). P1 exhibited cloudy phase transition above a certain temperature and the cloud point depended on the incubation time in solution at room temperature. SANS and DLS studies showed that P1 formed clusters by hydrophobic effect and weakened hydrophobic effect by polymer dissolution with incubation time consequently attributed to decrease in size or disappearance of clusters. The temperature dependence of cluster formation can be explained by hydrophobic effect with both the increase in scattering intensity by clusters at low q region and the decrease in correlation length of polymer at high q region based on ‘two Lorentz model’ analysis. Decreasing intensity of clusters on the scattering patterns of P1 with increasing incubation time shows weak cluster formation. Decrease of Porod exponent of P1 solution below cloud point reflects the dissolution change of P1 from mass fractal of branched polymer to loosen structure of polymer chains as incubation time increases.