Competition Between Motion Constraint and Aggregation of Macromolecular Chains in Poly(vinyl methyl ether)/Poly(ethylene oxide) Aqueous Solution During Phase Transition.

Yang, Kun; Yang, Yu Zhao; Hu, Cheng Long; Huang, Yun Yun; Zhang, Wen Kai; Chen, Xu Dong; Zhang, Ming Qiu

Resonance light scattering (RLS) technique was applied to study macromolecular entanglements in highly dilute poly(vinyl methyl ether) (PVME)/poly(ethylene oxide) (PEO) solution during phase transition process. Temperature dependences of RLS intensities of PVME, PEO and PVME/PEO solutions were recorded. In addition, simulated temperature dependence of RLS intensity of PVME/PEO solution was drawn supposing there was no interaction between PEO and PVME. Comparison between the measured with the simulated results indicated that there were obvious differences in RLS intensities and transition temperatures. The present work proved the existence of entanglements during phase separation in highly dilute solution. Moreover, a model was proposed to describe the entanglement behavior.

Macromolecular Chemistry & Physics, 2012, Vol 213, Issue 16, p1735

1022-1352

Academic Journal

10.1002/macp.201200090