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《Journal of Anhui Normal University(Natural Science)》 2013-01
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Complexation of Thermo-Responsive Poly(N-isopropylacrylamide) with Micelles Investigated by Laser Light Scattering

TANG Ye-cang,DUAN Ji-xiong,WU Jian-hua(College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241000,China)  
Poly(ε-caprolactone-b-ethylene oxide-b-ε-caprolactone)(PCL-b-PEO-b-PCL) block copolymers form micelles in water.The introduction of thermo-responsive poly(N-isopropylacrylamide)(PiPA) leads to the complex formation through hydrophobic interaction.The influence of temperature and the weight ratio(r) of PCL-b-PEO-b-PCL to PiPA on the complexation has been studied by laser light scattering.At r=1,due to the excessive PiPA chains in solution,the interchain association and intrachain collapse of PiPA on the complex surface lead to the size decrease and the scattering intensity increase.At r=5,the intrachain contraction causes the size of the complexes decreases with temperature.
【Fund】: 安徽省自然科学基金(11040606M61);; 安徽省教育厅自然科学基金(KJ2011A137)
【CateGory Index】: O631.3
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