THE ROLE OF DYNAMIC CONTACT CONCENTRATION
According to de Gennes classification 1 , polymer solution ought be divided into three regimes, namely dilute, semi-dilute and concentrated solutions. The boundary concentration between the dilute and the semi-dilute solution is named overlap concentration C*, at which the individual coil just in contact with surrounding coils statically. In 1982, Prof. Qian Renyuan 2, 3 proposed that the dilute solution should be subdivided into two subregimes i.e., extremely dilute and dilute solution. He introduced a technical term dynamic contact concentration and symbol Cs for the boundary between these two sub-regimes. The symbol Cs means the macromolecular coil in solution starts to shrink when c>Cs. The existence of dynamic contact concentration was confirmed later by size exclusion chromatography 4, Dynamic light scattering measurements of polystyrene solution 5 and physical gel formation of polymer solution 6.
Rongshi Cheng
Nanjing University,South China University of Technology
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
3-4
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）