Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (1): 135.

• Articles • Previous Articles     Next Articles

A Study on the Micelle and Phase Separation Behavior of NIPAM-ODA Copolymer in Aqueous Solution

SHI Xiang-Yang1, LI Jun-Bai1, SUN Cao-Min WU Shi-Kang2   

  1. 1. Institute of pHotographic Chemistry, Chinese Academy of Sciences, Beijing, 100101;
    2. Beijing Institute of Technology, Beijing, 100081
  • Received:1998-01-22 Online:1999-01-24 Published:1999-01-24

Abstract: To study the micele and phase separation behavior of amphiphilic copolymer in aqueous solution which is temperat ure-sensit ive, The copolymer of N-isopropylacrylamide(NIPAM)and octadecyl acrylate(ODA)was syn The sized.The micelle behavior of The copolymer was studied by drop weight method and fluorescence probe method respectively.Simultaneously, the phe-nomenon of LCST(Lower Crit ical Solution Temperat ure)of The copolymer in aqueous solution with The increase of temperat ure was also studied by using fluorescence probe met hod.results showed that, the phase separation came into being in The aqueous solution of the copolymer when temperature was increased to its LCST.The P-Aisotherms of The molecule of The copolymer as insoluble monolayer on water surface was obt ained by L-Bmet hod.The abnormal phenomenon that the monolayer of The copolymer got coacervat ive more and more with the increase of The tem-perat ure was observed.It further indicated that The phase separation of the copolymer occured from anoTher met hod.This phenomenon was also discussed in detail.

Key words: Water soluble polymer, Phase separation, Fluorescence probe, P-Aisotherms

CLC Number: 

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