Citation: Xin Song LI, Guo Chang WANG, Bing Lin HE. Intrachain and Interchain Interactions in Polystyrene:Dilute and Semidilutc Solutions[J]. Chinese Chemical Letters, ;1999, 10(11): 961-964. shu

Intrachain and Interchain Interactions in Polystyrene:Dilute and Semidilutc Solutions

1.
Department of Chemical Engineering Southeast University Naming 210096;
2.
Institute of Polymer Chemistry Nankai University Tianjin 300071

Received Date: 13 July 1999

Excimer formation in pyrenyl labeled polystyrene has been investigated in dilute solution region.The change of the intensity ratio of excimer to monomer (I_e/I_m) with increasing concentration(C), is interpreted by intrachain and interchain interactions.The double logarithmic plot of I_e/I_m vs C displays two critical points, Csat about 2.5×10^-3g/ml and C⁺ at about 3.2×10^-2 g/ml.In dilute region Cs, excimer formation may be controlled by intrachain interaction.
- Excimer fluorescence,
- dilute solution,
- chain interaction,
- critical concentration
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