CJCU

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (3): 612.

• Articles • Previous Articles     Next Articles

Effect of Solvent on the Enzyme Catalysis Biodegradation of PBS with High Molecular Weight and Its Modified Copolymer

ZHANG Min1,2*, DING Ming-Liang1, ZHANG Ting1, YANG Jin-Ming1   

  1. 1. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi′an 710021, China;
    2. Zhejiang Wenzhou Research Institute of Light Industry, Wenzhou 325003, China
  • Received:2009-05-31 Online:2010-03-10 Published:2010-03-10
  • Contact: ZHANG Min. E-mail: zhangmin@sust.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 50673056)、温州科技计划项目(批准号: H20080045)和陕西省重大科技创新项目(批准号: 2009ZKC08-09)资助.

PDF (PC)

Cited

15

Abstract:

PBS and PBS/CHDM copolymers with high molecular weight were degraded via immobilized lipase in different polar solvents, such as toluene, tetrahydrofuran, and mixed solvent of toluene and tetrahydrofuran, respectively. The degradation products were analyzed by mass spectrometry(MS). The chemical structure was characterized by FTIR. And the molecular weight was determined by GPC. Under the function of immobilized lipase, PBS with Mn=100000 can be degraded to Mn=40000 in toluene and to Mn=14000 in tetrahydrofuran system. While in mixed solvent of toluene and tetrahydrofuran, PBS and PBS/CHDM with Mn more than 100000 can be degraded to below Mn=1000. The products almost are monomer, 1—4 cyclic oligomer, liner oligomer and a small amount of linear oligomer. The existence of a small amount of water has a certain impact on enzymatic reaction.

Key words: Lipase degradation; Modified copolymer of PBS; Monomer; Cyclic oligomer; Linear oligomer

TrendMD: