Direct melting polycondensation and characterization of poly(?-caprolactone-co-lactic acid) |
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Authors: | Yaoming Zhao Ling Zhou Zhaoyang Wang |
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Institution: | (1) Institute of Materials, South China University of Technology, Guangzhou, 510640, China;(2) Continental Specialties (Guangzhou) Co. Ltd., Guangzhou, 511455, China;(3) Department of Chemistry, South China Normal University, Guangzhou, 510006, China |
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Abstract: | A kind of biodegradable material, poly(ɛ-caprolactone-co-lactic acid) P(CL-co-LA)] was synthesized via the direct melting polycondensation of lactic acid (LA) and ɛ-caprolactone (CL). The influences
of the polycondensation time, and the catalyst type on the intrinsic viscosity of P(CL-co-LA) were also investigated. The results indicate that P(CL-co-dl-LA), with an intrinsic viscosity of 0.4733 dL/g, can be prepared by direct melting polycondensation with the molar ratio
LA/CL = 3:7 at 180°C and 70 Pa for 12 h, using 0.5% (mass fraction) of SnCl2 as the catalyst. Compared with lactide ring-opening polycondensation (ROP), the direct melting polycondensation of LA and
CL is more practicable and simple.
Translated from Journal of South China University of Technology, 2006, 34(7): 7–11 (in Chinese) |
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Keywords: | poly(ɛ -caprolactone-co-lactic acid) direct melting polycondensation biodegradability |
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