Synthesis and Properties of Degradable Copolymers Com- posed of Poly（E-caprolactone） and 3,4-Dihydroxycinnamic Acid  

作　　者：李继航 施冬健 徐华青 胡娜 东为富 陈明清 

机构地区：[1]Key Laboratory of Food Colloids and Biotechnology,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China

出　　处：《Chinese Journal of Chemistry》2012年第10期2445-2452,共8页中国化学（英文版）

基　　金：The authors would like to thank the National NaturalScience Foundation of China （Nos. 51173072, 21004029, 51003042）, Research and Innovation Pro- gram for Graduate Colleges and Universities （No. CX10B_225Z） and State Key Laboratory of Molecular Engineering of Polymers （Fudan University, K2011-08） for financially supporting this research.

摘　　要：Photoreactive and degradable hyperbranched （HB） copolymers with various 3,4-dihydroxycinnamic acid （DHCA） compositions, poly（e-caprolactone）-co-poly（3,4-dihydroxycinnamic acid） （PCL-co-PDHCA）, were ob- tained by thermal melt-polycondensation of PCL and DHCA. The HB structures and the branching degree （BD） of the PCL-co-PDHCA copolymers were confirmed by Fourier transform infrared spectroscopy （FTIR） and nuclear magnetic resonance （1H NMR）. The melting points （Tm） of the PCL-co-PDHCA copolymers changed depending on the PCL and DHCA composition by differential scanning calorimetry （DSC） measurements. Wide angle X-ray dif- fraction （WXRD） analysis showed semi-crystalline of the PCL and PCL-co-PDHCA polymers. The PCL-co-PDHCA copolymers showed good photoreactivities and fluorescent properties. Crosslinking of the cin- namoyl groups in the copolymers caused by UV irradiation affected the thermal stability and wettability slightly. Moreover, the hydrolysis experiments revealed that copolyrners are facile degradable.Photoreactive and degradable hyperbranched （HB） copolymers with various 3,4-dihydroxycinnamic acid （DHCA） compositions, poly（e-caprolactone）-co-poly（3,4-dihydroxycinnamic acid） （PCL-co-PDHCA）, were ob- tained by thermal melt-polycondensation of PCL and DHCA. The HB structures and the branching degree （BD） of the PCL-co-PDHCA copolymers were confirmed by Fourier transform infrared spectroscopy （FTIR） and nuclear magnetic resonance （1H NMR）. The melting points （Tm） of the PCL-co-PDHCA copolymers changed depending on the PCL and DHCA composition by differential scanning calorimetry （DSC） measurements. Wide angle X-ray dif- fraction （WXRD） analysis showed semi-crystalline of the PCL and PCL-co-PDHCA polymers. The PCL-co-PDHCA copolymers showed good photoreactivities and fluorescent properties. Crosslinking of the cin- namoyl groups in the copolymers caused by UV irradiation affected the thermal stability and wettability slightly. Moreover, the hydrolysis experiments revealed that copolyrners are facile degradable.

关 键 词：DEGRADABILITY hyperbranched structure PHOTOREACTIVITY 

分 类 号：O632.13[理学—高分子化学] TQ245.4[理学—化学]