Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (7): 7-11.

• Materials Science & Technology • Previous Articles     Next Articles

Direct Melting Copolymerization and Characterization of Poly(ε-Caprolactone-co-Lactic Acid

Zhao Yao-ming1  Zhou Ling1  Wang Zhao-yang2   

  1. 1.College of Materials Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China; 2.Dept.of Chemistry,South China Normal Univ.,Guangzhou 510631,Guangdong,China
  • Received:2005-08-30 Online:2006-07-25 Published:2006-07-25
  • Contact: 赵耀明(1940-)，男，教授，博士生导师，主要从事高分子材料成型加工及功能化的研究． E-mail:psymzhao@scut.edu.cn
  • About author:赵耀明(1940-)，男，教授，博士生导师，主要从事高分子材料成型加工及功能化的研究．
  • Supported by:

    高等学校博士学科专项科研基金资助项目(20050561020)

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Abstract:

A kind of biodegradable material poly(ε-caprolactone-co-lactic acid)[P(CL-co-LA)]was synthesized via the direct melting c0p0lymerizati0n of lactic acid(LA)and ε-caprolactone(CL). The influences of the prepo-lymerization time，the c0p0lymerizati0n time and the catalyst type on the intrinsic viscosity of P(CL-co-LA)werealso investigated. The results indicate that P(CL-co-dl-LA)with an intrinsic viscosity of 0.4733dL/g can be pre-pared by the direct melting copolymerization of dl-LA and CL in a mole ratio of 3:7 at 180℃and 70 Pa for 12 h,with 0.5%(mass fraction)of SnCl2 as the catalyst,and that P(CL-co-l-LA)with an intrinsic viscosity of 0.4121dL/g can be produced by the direct melting copolymerization of l-LA and CL in the same conditions for 16 h. As compared with the lactide ring—opening polymerization(ROP),the direct melting c0p0lymerization 0f LA and CL is proved more practicable and simpler.

Key words: poly(ε-caprolactone-co-lactic acid), direct melting copolymerization, synthesis, structure characte-rization, biodegradability