This research studied the initiator efficiency for producing polymeric particles of poly(styrene-co-methyl methacrylate)copolymers by a Shirasu porous glass membrane(SPG)emulsification technique followed by suspension...This research studied the initiator efficiency for producing polymeric particles of poly(styrene-co-methyl methacrylate)copolymers by a Shirasu porous glass membrane(SPG)emulsification technique followed by suspension copolymerization.BPO,ADVN,and AIBN were used as initiators and we found that BPO is the most suitable initiator.Copolymers for various feed ratios of styrene/methyl methacrylate were thus synthesized by benzoyl peroxide,and their copolymer particle size,molecular weight distribution and pat-ride size distribution were characterized.Then n-BMA or 2-EHMA was added as the third monomer to decrease the terpolymer glass transition temperature.This article describes the preparation technique,recipes and polymerization conditions for producing both copolymer and terpolymer particles,particle size changes,the corresponding particle morphologies and glass transition temperatures.展开更多
The goal of this preliminary study was to evaluate the potential application of magnetic flux for document screening.In this investigation,we examined the homogeneity of magnetic flux over the entire page of sample do...The goal of this preliminary study was to evaluate the potential application of magnetic flux for document screening.In this investigation,we examined the homogeneity of magnetic flux over the entire page of sample documents and provided recommendations on the measurements procedure.展开更多
文摘This research studied the initiator efficiency for producing polymeric particles of poly(styrene-co-methyl methacrylate)copolymers by a Shirasu porous glass membrane(SPG)emulsification technique followed by suspension copolymerization.BPO,ADVN,and AIBN were used as initiators and we found that BPO is the most suitable initiator.Copolymers for various feed ratios of styrene/methyl methacrylate were thus synthesized by benzoyl peroxide,and their copolymer particle size,molecular weight distribution and pat-ride size distribution were characterized.Then n-BMA or 2-EHMA was added as the third monomer to decrease the terpolymer glass transition temperature.This article describes the preparation technique,recipes and polymerization conditions for producing both copolymer and terpolymer particles,particle size changes,the corresponding particle morphologies and glass transition temperatures.
文摘The goal of this preliminary study was to evaluate the potential application of magnetic flux for document screening.In this investigation,we examined the homogeneity of magnetic flux over the entire page of sample documents and provided recommendations on the measurements procedure.
