on Properties of Polymers Composed of Poly(
-caprolactone)and Hydroxycinnamic Acid1
Jihang Lia, Dongjian Shia, b,**, Na Hua, and Mingqing Chena,*
a The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
b State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China
*e-mail: mqchen@jiangnan.edu.cn
**e-mail: djshi@jiangnan.edu.cn
Received October 19, 2012;
Revised Manuscript Received February 20, 2013
Abstract—Photoreactive and degradable polymers with linear and hyperbranched architectures which com-
posed of poly(
-caprolactone) and hydroxycinnamic acid or its substituted derivatives were synthesized by ther-
mal melt-polycondensation. The chemical structures of the polymers were confirmed by FTIR and 1H NMR
measurements. The polymers showed good photoreactivities and fluorescent properties, and the hyperbranched
polymers showed higher photoreactive speed and weaker fluorescence properties. These polymers had excellent
thermal stabilities due to the rigid conjugated structures and the 
– strcking interaction of the cinnamoyl
group, especially for the hyperbranched polymer. Moreover, the hydrolysis experiments and the XRD results
revealed that the hyperbranched and linear polymers are amorphous and crystalline, respectively, and the deg-
radation rate of amorphous polymers are faster than crystalline samples.
DOI: 10.1134/S0965545X14030092
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