Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Ri Guang Jin"'
Publikováno v:
Asian Journal of Chemistry. 26:2561-2564
Publikováno v:
Korean Journal of Chemical Engineering. 30:746-750
Molecular weight distribution of copolyacrylonitrile, which was obtained from precipitation copolymerization without and with using dispersants in mixed solution, is studied. The contribution ratio of liquid phase polymerization and solid phase polym
Publikováno v:
Carbon letters. 14:34-39
Acrylonitrile (AN)-acrylamide (AM) copolymers were prepared by nitric acidic hydrolysis of homopolyacrylonitrile. The acrylamino group increased as a function of hydrolysis time, while crystallinity decreased. Differential scanning calorimetry and a
Autor:
Run Cheng, Zhang Huibo, Jing Wang, Shuangkun Zhang, Weiwei Liu, Ri-Guang Jin, Seung-Kon Ryu, Cheng Yumin
Publikováno v:
Carbon letters. 14:45-50
Polyacrylonitrile (PAN) copolymers of different molecular weights were synthesized by a suspension polymerization and precipitation polymerization method. The rheology behaviors of the synthesized PAN copolymers were investigated in relation to their
Publikováno v:
Carbon letters. 13:133-138
According to kinetic mechanisms, liquid phase polymerization and solid phase polymerization are different in acrylonitrile (AN) polymerization, and so the relationship between the contribution ratio and molecular weight distribution (MWD) was obtaine
Publikováno v:
Carbon letters. 12:229-235
Isotactic polyacrylonitrile (PAN) with triad isotacticity of 0.53, which was determined by 13C nuclear magnetic resonance, using dialkylmagnesium as an initiator, was successfully synthesized. Isothermal treatment of iso-PAN was conducted in air at 2
Publikováno v:
Polymer Korea. 35:424-430
Biodegradable poly((glycine ethyl ester)-(phenylalanine ethyl ester) phosphazene)(PGPP) microparticles were fabricated by electrohydrodynamic atomization to apply drug release test. Atomization parameters such as applied voltage, polymer concentratio
Publikováno v:
Carbon letters. 12:107-111
Polyacrylonitrile (PAN) fibers were pre-oxidized in a temperature range of 180-275°C. The effects of positive and negative stretching on the structure and morphology of PAN fiber in the pre-oxidation process were studied by FTIR spectroscopy, XRD, a
Publikováno v:
Carbon letters. 11:176-183
PAN precursor fibers were produced via wet-spinning process, and effects of polymerization and spinning processes, especially the stretching process, were investigated on mechanical properties and micro-morphologies of precursor fibers. An increase i
Publikováno v:
Carbon letters. 11:22-27
The precipitation polymerization of acrylonitrile (AN) was carried out in a mixture solution of dimethyl sulfoxide (DMSO) and water at 50~65oC using α,α’-azobisisobutyronitrile (AIBN) as an initiator. The increased molecular weight polyacrylonitr