Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (05): 478-482.doi: 10.3866/PKU.WHXB20040507

• ARTICLE • Previous Articles     Next Articles

Fluorescence Probe Studies on the Conformation Behavior of P(DEAM-co-MAA) in Dilute Aqueous Solution

Liu Shou-Xin;Liu Ming-Zhu   

  1. College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000;School of Chemistry and Materials Science, Shaanxi Normal University, Xi’an 710062
  • Received:2003-09-15 Revised:2003-12-16 Published:2004-05-15
  • Contact: Liu Ming-Zhu E-mail:m-zliu@163.com

Abstract: The conformation behavior of N,N-diethylacrylamide (DEAM) and methacrylic acid (MAA) copolymer P(DEAM-co-MAA) was investigated by fluorescence probe technique and UV transmittance measurements. The results demonstrated that the conformation behavior of P(DEAM-co-MAA) in dilute aqueous solution is similar to that of PMAA, showing hypercoiled conformation and forming hydrophobic microdomain when the molar fraction of DEAM in P(DEAM-co-MAA) is less than 8.00% and the solution pH is less than 6;but the conformation of P(DEAM-co-MAA) in dilute aqueous solution shows a loose extended form due to polymer dilution effect in all of pH range when the molar fraction of DEAM in P(DEAM-co-MAA) is higher than 8.00%.The effect of DEAM contents and pH on the conformation of P(DEAM-co-MAA) may find some uses in the design and synthesis of novel sensitive gels.

Key words: Fluorescence probe, Transmittance, P(DEAM-co-MAA) copolymer,  Conformation behavior, Polymer dilute effect, Hydrophobic association