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Citation: Liu Shou-Xin, Liu Ming-Zhu. Fluorescence Probe Studies on the Conformation Behavior of P(DEAM-co-MAA) in Dilute Aqueous Solution[J]. Acta Physico-Chimica Sinica, ;2004, 20(05): 478-482. doi: 10.3866/PKU.WHXB20040507 shu

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

1.
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou　730000;School of Chemistry and Materials Science, Shaanxi Normal University, Xi’an　710062

Received Date: 15 September 2003
Available Online: 15 May 2004

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.
- Fluorescence probe;Transmittance;P(DEAM-co-MAA) copolymer;　Conformation behavior;Polymer dilute effect;Hydrophobic association
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