A study on the micelle and phase separation behavior of NIPAM-ODA copolymer in aqueous solution

To study the micelle and phase separation behavior of amphiphilic copolymer in aqueous solution which is temperature-sensitive, the copolymer of N-iso propylacrylamide (NIPAM) and octadecyl acrylate(ODA) was synthesized, The m icelle behavior of the copolymer was studied by drop weight method and fluo rescence probe method respectively, Simultaneously, the phenomenon of LCST (Lower Critical Solution Temperature) of the copolymer in aqueous solution with the increase of temperature was also studied by using fluorescence pro be method, Results showed that, the phase separation came into being in the aqueous solution of the copolymer when temperature was increased to its LC ST, The pi-A isotherms of the molecule of the copolymer as insoluble monola yer on water surface was obtained by L-B method. The abnormal phenomenon th at the monolayer of the copolymer got coacervative more and more with the i ncrease of the temperature was observed. It further indicated that the phas e separation of the copolymer occured from another method, This phenomenon was also discussed in detail.