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2007年 第1卷 第1期

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《化学科学与工程前沿（英文）》 >> 2007年 第1卷 第1期 doi: 10.1007/s11705-007-0015-7

Synthesis and thermosensitive behavior of dextran graft copolymers containing poly (N-vinylcaprolactam) side chains

Institute of Polymer Science, School of Chemistry and Chemical Engineering and Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, China;

发布日期： 2007-03-05
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New graft copolymers were synthesized by grafting N-vinylcaprolactam onto dextran. Their composition and structure were investigated by elemental analyses, infrared spectra and thermogravimetric analyses. By optical transmittance measurements, it was found that the aqueous solutions of these graft copolymers showed a temperature-dependent transmittance change due to the introduction of thermosensitive poly (-vinylcaprolactam) graft chains. Moreover, the lower critical solution temperature (LCST) of the graft copolymer in aqueous solution was dependent on its grafting extent and concentration. The LCST value was found to increase with the increase of the grafting extent and decrease with the increase of the copolymer concentration. With these stimuli-response properties, such polysaccharide derivative may hold potential applications in biomedicine and biotechnology.

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