Results 191 to 200 of about 11,637 (219)

A simple method for preparation of lignin/TiO2 nanocomposites by sulfonation degree regulation and their application in polyurethane films.

International Journal of Biological Macromolecules, 2021
The waterborne polyurethane (WPU) exposed to outdoor environment for a long time are more likely to reduce their mechanical performance and service life.
Ze Yuan, Xinyue Shang, Jing Fang, Hao Li
semanticscholar   +1 more source

Ionic polymer–metal composite actuator based on sulfonated poly(ether ether ketone) with different degrees of sulfonation

Sensors and Actuators A: Physical, 2016
Abstract The sulfonated poly(ether ether ketone) (SPEEK) membranes with different degrees of sulfonation (DS) were prepared for fabricating high-performance ionic polymer–metal composite (IPMC) actuators. The ion exchange capacity (IEC), water uptake and ion conductivity of SPEEK membranes increase accordingly with the increase of the DS of SPEEK ...
Yongjun Tang, Zhigang Xue, Xiaolin Xie, Xingping Zhou   +3 more
openaire   +1 more source

Design and synthesis of side-chain optimized poly(2,6-dimethyl-1,4-phenylene oxide)-g-poly(styrene sulfonic acid) as proton exchange membrane for fuel cell applications: Balancing the water-resistance and the sulfonation degree

, 2021
Side-chain optimized poly (2,6-dimethyl-1,4-phenylene oxide)-g-poly (styrene sulfonic acid) (PPO-g-PSSA) is designed with balanced water-resistance and sulfonation degree.
Guangbo Zeng, Dongqing Zhang, Liuming Yan, B. Yue, P. Ting, Yidong Hu, Shufa He, Hongbin Zhao, Jiujun Zhang   +8 more
semanticscholar   +1 more source

Preparation and properties of sulfopropyl chitosan derivatives with various sulfonation degree

Journal of Applied Polymer Science, 2010
AbstractIn this investigation, chitosan (CS) is modified by propane sultone via a sulfonation reaction to create various degrees of sulfonation. The sulfonated chitosan (SCS) has a pendant alkyl sulfonic group dangling at the side chain, which can improve its hydrophilicity and water solubility.
Huang‐Shian Tsai, Yen‐Zen Wang, Jong‐Jing Lin, Wan‐Fu Lien   +3 more
openaire   +1 more source

Preparation and electrochemical characterization of sulfonated polysulfone cation‐exchange membranes: Effects of the solvents on the degree of sulfonation

Journal of Applied Polymer Science, 2005
AbstractSulfonated polysulfone cation‐exchange membranes with various degrees of sulfonation were prepared by a treatment with chlorosulfonic acid in different solvents of various polarities, and the effect of the solvent polarity on the degree of sulfonation was explored.
R. K. Nagarale, G. S. Gohil, Vinod K. Shahi, R. Rangarajan   +3 more
openaire   +1 more source

Sulfonation degree determination of polystyrene ionomers by using adiabatic bomb calorimeter

Journal of Applied Polymer Science, 2006
AbstractSulfonation degree determination of sulfonated polystyrene and the corresponding ionomers are performed by adiabatic bomb calorimeter. The theoretical calculations from the band energies for the combustion enthalpy values (calorific values) and the experimental values are compared, and a linear relation between the values is found.
Alkan, C., Dumanli, Ahu Gumrah, Aras, Leyla   +2 more
openaire   +2 more sources

Sulfonated polysulfone proton exchange membrane influenced by a varied sulfonation degree for vanadium redox flow battery

Journal of Membrane Science, 2019
A series of sulfonated polysulfone (SPSF) proton exchange membranes with varied degree of sulfonation (DS) are prepared through controlling the molar ratio of sulfonated agent and polysulfone (PSF).
Yuxia Zhang, Lanyue Zheng, Bo Liu, Haixia Wang, Haifeng Shi   +4 more
semanticscholar   +1 more source

Poly(aryl ether ketone) membrane with controllable degree of sulfonation for organic solvent nanofiltration

, 2021
Yirong Sun, T. Sun, Jinhui Pang, N. Cao, Cheng Yue, Jin Wang, Xiaocui Han, Zhenhua Jiang   +7 more
semanticscholar   +1 more source

Shifting the degree of sulfonation in a polyaniline derivative by the applied potential

Synthetic Metals, 2008
Abstract Diphenylamine-4-sulfonic acid and aniline were copolymerized by cyclic scanning of the potential in 1 M HCl solutions on platinum substrates. The inversion potential was shifted from values where diphenylamine-4-sulfonic acid is the only monomer oxidized to higher values where the oxidation of aniline is significant.
M.A. Cotarelo, F. Montilla, F. Huerta
openaire   +1 more source

Synthesis of highly branched sulfonated polymers and the effects of degree of branching on properties of branched sulfonated polymers as proton exchange membranes

Journal of Power Sources, 2014
Abstract Branched sulfonated polymers exhibit excellent properties as proton exchange membranes (PEMs). However, very few highly branched sulfonated polymers are reported as PEMs. The highly branched polymer, including the method to increase degree of branching (DB) and the effects of DB on the properties of PEMs, should be further studied.
Huixiong Xie, Duan Wang, Dan Tao, Lei Wang   +3 more
openaire   +1 more source