POLYDISPERSITY EFFECTS IN THE SYSTEM POLY(ETHYLENE GLYCOL) PLUS DEXTRAN PLUS WATER

被引:12
|
作者
GAUBE, J
HOCHEMER, R
KEIL, B
PFENNIG, A
机构
[1] Institut für Chemische Technologie, Technische Hochschule Darmstadt, D-6100 Darmstadt
来源
关键词
D O I
10.1021/je00010a005
中图分类号
O414.1 [热力学];
学科分类号
摘要
Tie lines in the system poly(ethylene glycol) (PEG) + dextran + water have been measured at 20-degrees-C. The apparent polydispersity of PEG was varied by mixing two essentially monodisperse PEG fractions in different ratios. The overall phase composition for a given tie line was changed to obtain phase ratios different from unity. The concentrations and molecular-weight distributions of all polymers in the coexisting liquid phases were determined using size-exclusion chromatography (SEC). The results are compared to those of systems containing monodisperse PEG with different molecular weights.
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页码:207 / 210
页数:4
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