The degradation of diethylene glycol terephthalate (DTP) and polyethylene terephthalate (PET) fiber by microbe was studied.The degree of DTP degradation was determined by High Performance Liquid Chromatography (HPLC) ...The degradation of diethylene glycol terephthalate (DTP) and polyethylene terephthalate (PET) fiber by microbe was studied.The degree of DTP degradation was determined by High Performance Liquid Chromatography (HPLC) to be more than 90%.The products after degradation of DTP and PET fiber were various.The degradation of DTP can be described by the first-order reaction model.The degradation of PET fiber was found to be little,but surface erosion of PET fiber could be clearly seen from the SEM photographs indicating there occurred some traces of biodegradation on the PET fiber surface.展开更多
The reactiving ratios of vinyl acetate (VAc) and divinyl benzene (DVB) werecalculated from the Q and e values. The possibility of the copolymerization of thesetwo monomers was predicted and the copolymerization was ca...The reactiving ratios of vinyl acetate (VAc) and divinyl benzene (DVB) werecalculated from the Q and e values. The possibility of the copolymerization of thesetwo monomers was predicted and the copolymerization was carried out by-sin pensionpolymerization technique in the presence of pore producing agent (toluene andgasoline). The relative ratio of acetoxy group and benzene ring in the copolymer weremonitored by IR measurement during the polymerization. The variation of poreproperties, such as specific surface area, porosity and average pore diameter withpolymerization time were determined The copolymers at various polymerization timewere alcoholyzed and thus the variation of the hydroxyl group content withpolymerization time was studied.展开更多
基金The Sustentation Fund of Science Technology Development of High University of Tianjin City's (021106)
文摘The degradation of diethylene glycol terephthalate (DTP) and polyethylene terephthalate (PET) fiber by microbe was studied.The degree of DTP degradation was determined by High Performance Liquid Chromatography (HPLC) to be more than 90%.The products after degradation of DTP and PET fiber were various.The degradation of DTP can be described by the first-order reaction model.The degradation of PET fiber was found to be little,but surface erosion of PET fiber could be clearly seen from the SEM photographs indicating there occurred some traces of biodegradation on the PET fiber surface.
文摘The reactiving ratios of vinyl acetate (VAc) and divinyl benzene (DVB) werecalculated from the Q and e values. The possibility of the copolymerization of thesetwo monomers was predicted and the copolymerization was carried out by-sin pensionpolymerization technique in the presence of pore producing agent (toluene andgasoline). The relative ratio of acetoxy group and benzene ring in the copolymer weremonitored by IR measurement during the polymerization. The variation of poreproperties, such as specific surface area, porosity and average pore diameter withpolymerization time were determined The copolymers at various polymerization timewere alcoholyzed and thus the variation of the hydroxyl group content withpolymerization time was studied.
