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Cross-Linked Poly (Cross-Link + poly)
Selected AbstractsElectrocatalytic Reduction and Determination of Iodate and Periodate at Silicomolybdate-Incorporated-Glutaraldehyde- Cross-Linked Poly- L -lysine Film ElectrodesELECTROANALYSIS, Issue 10 2010Yu-Ching Pan Abstract The present work describes reduction of iodate (IO3,), and periodate (IO4,) at silicomolybdate-doped-glutaraldehyde-cross-linked poly- L -lysine (PLL-GA-SiMo) film coated glassy carbon electrode in 0.1,M H2SO4. In our previous study, we were able to prepare the PLL-GA-SiMo film modified electrode by means of electrostatically trapping SiMo12O404, mediator in the cationic film of PLL-GA, and the voltammetric investigation in pure supporting indicated that the charge transport through the film was fast. Here, the electrocatalytic activity of PLL-GA-SiMo film electrode towards iodate and periodate was tested and subsequently used for analytical determination of these analytes by amperometry. The two electron reduced species of SiMo12O404, anion was responsible for the electrocatalytic reduction of IO3, at PLL-GA-SiMo film electrode while two and six electron reduced species were showed electrocatalytic activity towards IO4, reduction. Under optimized experimental conditions of amperometry, the linear concentration range and sensitivity are 2.5×10,6 to 1.1×10,2,M and 18.47,,A mM,1 for iodate, and 5×10,6 to 1.43×10,4,M and 1014.7,,A mM,1 for periodate, respectively. [source] Preparation of Cross-Linked Poly[(, -caprolactone)- co -lactide] and Biocompatibility Studies for Tissue Engineering MaterialsMACROMOLECULAR BIOSCIENCE, Issue 1 2007Hiroshi Miyasako Abstract In this study, cross-linked materials were prepared using the branched macromonomer with different CL/LA molar ratios, and feasibility studies for tissue engineering were carried out. The thermal and mechanical properties of these materials depended on the CL/LA compositions; however, there was no change in the wettability of each material. The HeLa cells adhesion and growth on the CL-LA7030c were equal to that on the commercially available polystyrene dish. The protein absorption experiment using the FBS proteins revealed that the materials with well-grown cells showed better adhesion of the proteins. [source] Physically and Chemically Cross-Linked Poly{[(maleic anhydride)- alt -styrene]- co -(2-acrylamido-2-methyl-1-propanesulfonic acid)}/Poly(ethylene glycol) Proton-Exchange MembranesMACROMOLECULAR CHEMISTRY AND PHYSICS, Issue 2 2007lser G. Devrim Abstract Novel proton exchange membranes were solvent-cast from DMF solutions of the terpolymers poly[(MA- alt -S)- co -AMPS], containing hydrophobic phenyl and reactive hydrophilic carboxylic and organo-sulfonic acid fragments with different compositions, and PEGs with different molecular weights and amounts. These membranes were formed as a result of physical (via H-bonding) and chemical (via PEG) cross-linking. The structures of membranes were confirmed by FT-IR and 1H- and 13C NMR spectroscopy. Mechanical and thermal properties, swellability, and proton conductivity of these membranes were significantly affected both by the chemical composition of the terpolymers (mainly the AMPS content) and also the cross-linker (PEG) molecular weight and content in the final form of the membranes. It was concluded that the membranes prepared by using the terpolymer with an AMPS content of 36.84 mol-% and PEG with a molecular weight of 1,450 and with an initial PEG content of 30 wt.-% are the most suitable ones for fuel cell applications. [source] One-Pot Synthesis of Micelles with a Cross-Linked Poly(acrylic acid) CoreMACROMOLECULAR CHEMISTRY AND PHYSICS, Issue 2 2006Genhua Zheng Abstract Summary: Stable micelles with polystyrene (PS) as a shell and cross-linked poly[(acrylic acid)- co -(ethylene glycol diacrylate)] as a core have been successfully prepared by reversible addition fragmentation chain transfer (RAFT) copolymerization of acrylic acid and ethylene glycol diacrylate in a selective solvent with PS-SC(S)Ph as a RAFT agent. For the preparation of stable micelles, the RAFT polymerizations are carried out in different solvents: benzene, cyclohexane, and mixtures of tetrahydrofuran and cyclohexane. The monomer/PS-SC(S)Ph molar ratio and molecular weight of the macro-RAFT agent, PS-SC(S)Ph, influence the RAFT polymerization and the formation of micelles. Block copolymerization in selective solvent with the RAFT agent. [source] | ||||||||||