Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Douglass S."'
Autor:
Cláudio P. Ribeiro, Anthony C. Comer, Douglass S. Kalika, Benny D. Freeman, Sumod Kalakkunnath
Publikováno v:
Polymer. 54:891-900
The glass–rubber and sub-glass relaxation characteristics of ortho-functionalized aromatic polyimides and thermally rearranged polymers were investigated by dynamic mechanical and dielectric methods. Soluble polyimides (HAB–6FDA; APAF–ODPA) wer
Publikováno v:
Industrial & Engineering Chemistry Research. 52:8906-8916
Aromatic random copolyimides were synthesized and tested as membrane materials for the separation of a mixture of aromatic and aliphatic hydrocarbons by pervaporation. The polymers were synthesized by a two-step polycondensation route with a total of
Publikováno v:
Journal of Membrane Science. :182-193
A series of aromatic polyimides and polybenzoxazoles was synthesized and tested as membrane materials for separation of aromatic/aliphatic mixtures by pervaporation. Homo- and random copolyimides were synthesized by a two-step polycondensation of a t
Publikováno v:
Polymer. 51:5245-5254
The dynamic relaxation characteristics of poly(ether imide) and poly(methyl methacrylate) nanocomposites based on native and surface-modified (i.e., hydrophobic) fumed silicas were investigated by dynamic mechanical analysis and dielectric spectrosco
Publikováno v:
Journal of Membrane Science. 359:25-36
3-[Tris-(trimethylsiloxy)silyl] propyl acrylate (TRIS-A) was copolymerized with poly(ethylene glycol) diacrylate (PEGDA), and the gas transport and physical properties of the resulting copolymers were characterized. Introduction of TRIS-A led to incr
Publikováno v:
Journal of Applied Polymer Science. 117:2395-2405
The glass-transition and gas-transport properties of rubbery polymer nanocomposites based on crosslinked poly(ethylene oxide) and metal oxide nanoparticles were studied. Nanocomposite samples were prepared by the UV photopolymerization of poly(ethyle
Water uptake, transport and structure characterization in poly(ethylene glycol) diacrylate hydrogels
Publikováno v:
Journal of Membrane Science. 347:197-208
Crosslinked poly(ethylene glycol) (PEG) free-standing films were prepared by UV-induced photopolymerization of poly(ethylene glycol) diacrylate (PEGDA) crosslinker in the presence of varying amounts of water or monofunctional poly(ethylene glycol) ac
Autor:
Michael K. Danquah, Scott T. Matteucci, Sumod Kalakkunnath, Jeffrey J. Richards, Benny D. Freeman, Douglass S. Kalika, Victor A. Kusuma
Publikováno v:
Chemical Engineering Science. 64:4707-4718
Poly(ethylene oxide) (PEO) networks prepared from the photopolymerization of bisphenol A ethoxylate diacrylate (BPA–EDA) have been investigated as a function of crosslinker molecular weight and copolymer composition. Dynamic mechanical and dielectr
Autor:
Victor A. Kusuma, Benny D. Freeman, Scott T. Matteucci, Michael K. Danquah, Douglass S. Kalika
Publikováno v:
Journal of Membrane Science. 341:84-95
Gas transport properties of rubbery cross-linked poly(ethylene oxide) films containing short phenoxy-terminated pendant chains are reported. Poly(ethylene glycol) diacrylate (PEGDA) was UV-polymerized with poly(ethylene glycol) phenyl ether acrylate
Publikováno v:
Journal of Membrane Science. 327:195-207
Three series of amorphous cross-linked poly(ethylene oxide) (XLPEO) rubbers were prepared by photopolymerization of prepolymer solutions containing poly(ethylene glycol) diacrylate (PEGDA) cross-linker and one of three structurally similar short chai