title: Study on the enzymatic degradation of PBS and its alcohol acid modified copolymer.
abstract: Enzymatic hydrolytic degradation of polybutylene succinate (PBS), poly(polybutylenesuccinate-co-1,4-cyclohexane dimethanol) (PBS/CHDM) and poly(polybutylene succinate-co-diglycolic acid) (PBS/DGA) in mixed solvent of tetrahydrofuran (THF) and toluene was examined. Lipase was used as catalyst to degrade polymers with molecular weight of more than 100,000, and the molecular weight of products ranged from hundreds to thousands. Thermal decomposition temperatures of all products were below 250°C. The degradation products of both PBS/CHDM and PBS/DGA showed two melting points at about 85 and 99°C. Mass spectrometry (MS) was employed to obtain the molecular weight of oligomers extracted from the products, which proved to be low-polyesters with the molecular weight of less 1,000. The butanediol (BDO) monomer was found in PBS/CHDM degradation product for the first time.
authors: Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an, Shaanxi, China.
authors: Mingliang
authors: M
authors: Ding
authors: Min
authors: M
authors: Zhang
authors: Jinming
authors: J
authors: Yang
authors: Jian-hui
authors: JH
authors: Qiu
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry / Q000378:metabolism; D001673:Biodegradation, Environmental; D002072:Butylene Glycols / Q000737:chemistry / Q000378:metabolism*; D002175:Candida / Q000201:enzymology; D003510:Cyclohexanes / Q000737:chemistry*; D005656:Fungal Proteins / Q000378:metabolism*; D005663:Furans; D006016:Glycolates / Q000737:chemistry*; D008049:Lipase / Q000378:metabolism*; D008970:Molecular Weight; D058105:Polymerization; D011108:Polymers / Q000737:chemistry / Q000378:metabolism*; D012997:Solvents; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014050:Toluene
chemical_list: D001672:Biocompatible Materials; D002072:Butylene Glycols; D003510:Cyclohexanes; D005656:Fungal Proteins; D005663:Furans; D006016:Glycolates; D011108:Polymers; D012997:Solvents; C089797:bionole; D014050:Toluene; C018674:tetrahydrofuran; C023353:1,4-cyclohexanedimethanol; D008049:Lipase; C571256:diglycolic acid