本文对比了乙烯基树脂浇注体和乙烯基团状模塑料(乙烯基BMC)的力学性能、热性能和耐磨性能,结果表明,相比乙烯基树脂,乙烯基BMC材料具有优异的综合性能,其中硬度在60以上,提升了77%;弯曲强度达到160 MPa以上,提升了14%;老化前质量磨损在...本文对比了乙烯基树脂浇注体和乙烯基团状模塑料(乙烯基BMC)的力学性能、热性能和耐磨性能,结果表明,相比乙烯基树脂,乙烯基BMC材料具有优异的综合性能,其中硬度在60以上,提升了77%;弯曲强度达到160 MPa以上,提升了14%;老化前质量磨损在4~5 mg之间,体积磨损在2~3 mm 3之间,分别降低了约96%和97%;老化后质量磨损为8~30 mg,体积磨损在4~14 mm 3之间,分别降低了65%和80%以上。展开更多
The synthesis of acyclovir and L-ascorbic acid with divinyladipate was performed with alkaline protease from Bacillus subtilis and lipase from Lipozyme (immobilized from Mucor miehei) in different anhydrous organic so...The synthesis of acyclovir and L-ascorbic acid with divinyladipate was performed with alkaline protease from Bacillus subtilis and lipase from Lipozyme (immobilized from Mucor miehei) in different anhydrous organic solvents. Two corresponding derivatives were obtained.展开更多
Transesterification reaction of lactose with divinyladipate in pyridine catalyzed by an alkaline protease from Bacillus subtilis at 50C for 3 days gave 6-O-vinyladipoyl-lactose (yield 35%). Poly(6-O-vinyladipoyl-lacto...Transesterification reaction of lactose with divinyladipate in pyridine catalyzed by an alkaline protease from Bacillus subtilis at 50C for 3 days gave 6-O-vinyladipoyl-lactose (yield 35%). Poly(6-O-vinyladipoyl-lactose) with Mn = 21,200, Mw = 32,900, Mw/Mn = 1.56 could be obtained by chemical polymerization. Poly(vinyl alcohol) containing lactose branch was biodegradable. After 6 days in aqueous buffer (PH 7), this alkaline protease could degrade the polymer to an Mn of ca. 2100, Mw/Mn = 2.56.展开更多
文摘本文对比了乙烯基树脂浇注体和乙烯基团状模塑料(乙烯基BMC)的力学性能、热性能和耐磨性能,结果表明,相比乙烯基树脂,乙烯基BMC材料具有优异的综合性能,其中硬度在60以上,提升了77%;弯曲强度达到160 MPa以上,提升了14%;老化前质量磨损在4~5 mg之间,体积磨损在2~3 mm 3之间,分别降低了约96%和97%;老化后质量磨损为8~30 mg,体积磨损在4~14 mm 3之间,分别降低了65%和80%以上。
文摘The synthesis of acyclovir and L-ascorbic acid with divinyladipate was performed with alkaline protease from Bacillus subtilis and lipase from Lipozyme (immobilized from Mucor miehei) in different anhydrous organic solvents. Two corresponding derivatives were obtained.
文摘Transesterification reaction of lactose with divinyladipate in pyridine catalyzed by an alkaline protease from Bacillus subtilis at 50C for 3 days gave 6-O-vinyladipoyl-lactose (yield 35%). Poly(6-O-vinyladipoyl-lactose) with Mn = 21,200, Mw = 32,900, Mw/Mn = 1.56 could be obtained by chemical polymerization. Poly(vinyl alcohol) containing lactose branch was biodegradable. After 6 days in aqueous buffer (PH 7), this alkaline protease could degrade the polymer to an Mn of ca. 2100, Mw/Mn = 2.56.
