Semicrystalline proton-conductive membranes with sulfonated amorphous phases

@article{Gianluca2011SemicrystallinePM,
  title={Semicrystalline proton-conductive membranes with sulfonated amorphous phases},
  author={Fasano Gianluca and Rosaria Califano and Marina Pellegrino and Vincenzo Venditto and Gaetano Guerra and Anna Borriello and Luigi Ambrosio and Lucia Sansone},
  journal={Fuel and Energy Abstracts},
  year={2011}
}
Abstract Proton-conductive membranes, exhibiting high chemical and thermomechanical resistance, have been obtained by s-PS films with the β crystalline phase and a sulfonated amorphous phase. These membranes can be obtained by a solid-state procedure on δ form films, which allows an easy and uniform sulfonation of the phenyl rings of the amorphous phase and preserves the crystalline phase, followed by suitable thermal treatments leading to the δ  →  β crystal-to-crystal transition. The high… Expand
9 Citations
The Effects of Temperature and Humidity on the Microstructure of Sulfonated Syndiotactic–polystyrene Ionic Membranes
TLDR
Micro-structural characterization by small-angle neutron scattering (SANS) method of sulfonated sPS films and sPS–fullerene composite membranes shows that the conductive properties of the membranes do not deteriorate with the increasing temperature and that all membranes equilibrated in liquid water show an increased conductivity at 80 °C compared to the room temperature. Expand
Sulfonated syndiotactic polystyrene: sorption of ionic liquid in the amorphous phase and of organic guests in the crystalline phase
Fourier Transform Infrared spectroscopy (FTIR) and Wide-Angle X-Ray Diffraction (WAXD) measurements have clearly established the occurrence of a dual sorption ability of sulfonated syndiotacticExpand
Monolithic polymeric aerogels with VOCs sorbent nanoporous crystalline and water sorbent amorphous phases.
TLDR
These new selectively sulfonated aerogels present the great advantage of a high water diffusivity and water uptake up to 600 wt % and increases greatly the sorption kinetics of organic pollutants by the hydrophobic nanopores of the crystalline phase. Expand
The Multilevel Structure of Sulfonated Syndiotactic-Polystyrene Model Polyelectrolyte Membranes Resolved by Extended Q-Range Contrast Variation SANS
TLDR
Membranes based on sulfonated synditoactic polystyrene (s-sPS) were thoroughly characterized by contrast variation small-angle neutron scattering (SANS) over a wide Q-range in dry and hydrated states, and fullerenes, which improve the resistance to oxidation decomposition, were incorporated in the membranes. Expand
Novel nanostructured semicrystalline ionomers by chemoselective sulfonation of multiblock copolymers of syndiotactic polystyrene with polybutadiene
Novel semi-crystalline sulfonated copolymers (sPS(B-SA)) have been synthesized by sulfonation of multiblock copolymers of syndiotactic polystyrene with cis-1,4-polybutadiene (sPSB), using a two-stageExpand
The multilevel structure of sulfonated 2 syndiotactic-polystyrene model polyelectrolyte 3 membranes resolved by extended Q-range contrast 4 variation SANS . 5
Membranes based on sulfonated synditoactic polystyrene (s-sPS) were thoroughly 15 characterized by contrast variation SANS over a wide Q-range in dry and hydrated states. 16 Following specialExpand
Monolithic nanoporous crystalline aerogels.
TLDR
Preparation methods, structure, and properties of physically cross-linked polymeric aerogels are reviewed, with particular emphasis to those whose cross-linking knots are crystallites and, more in particular, crystallites exhibiting nanoporous-crystalline forms. Expand
Recent progress in the chemical modification of syndiotactic polystyrene
It is an unquestionable fact that syndiotactic polystyrene (sPS) has stimulated great interest on the basis of its importance in basic scientific research and potential industrial applications. It isExpand
Advanced materials based on polymer cocrystalline forms
Polymeric “cocrystalline forms,” that is, structures were a polymeric host and a low-molecular-mass guest are cocrystallized, were early recognized, and in many cases also well characterized by X-rayExpand

References

SHOWING 1-10 OF 51 REFERENCES
Syndiotactic Polystyrene Films with Sulfonated Amorphous Phase and Nanoporous Crystalline Phase
A solid-state sulfonation procedure on syndiotactic polystyrene (s-PS) δ-form films allows an easy and uniform sulfonation of the phenyl rings of the amorphous phase and preserves the nanoporousExpand
Gas sorption and transport in syndiotactic polystyrene with nanoporous crystalline phase
Abstract In this contribution we analyse sorption and transport of several gases in semicrystalline syndiotactic polystyrene with nanoporous crystalline δ form. Investigation was performed onExpand
Syndiotatic Polystyrene Aerogels with , ?, and e Crystalline Phases
The influence of thermal treatments and supercritical carbon dioxide extraction procedures on the crystal structure and morphology of sPS aerogels is investigated mainly by wide-angle X-rayExpand
Polymorphism of syndiotactic polystyrene: γ phase crystallization induced by bulky non-guest solvents
The crystallization of amorphous syndiotactic polystyrene (s-PS) films when induced by bulky solvents, whose molecules are too big to be enclosed as guest of s-PS clathrate phases, generally leads toExpand
Chloroform sorption in nanoporous crystalline and amorphous phases of syndiotactic polystyrene
The transport of chloroform in films of atactic polystyrene and of semi- crystalline syndiotactic polystyrene in its nanoporous form (d-form) has been investi- gated by gravimetric analysis.Expand
Thermal Transitions of ε Crystalline Phases of Syndiotactic Polystyrene
Thermal transitions of the three crystalline phases (γ, δ, and e) of syndiotactic polystyrene (s-PS), presenting s(2/1)2 helices, have been compared by X-ray diffraction, differential scanningExpand
Nanoporous Polymer Crystals with Cavities and Channels
A cheap, commercial, and easy-to-process hydrocarbon polymer (syndiotactic polystyrene, s-PS) can be crystallized in two different nanoporous phases (δ and e) that show large uptake of several guestExpand
Non-Fluorinated Polymer Materials for Proton Exchange Membrane Fuel Cells
▪ Abstract The past 10 years have witnessed a tremendous acceleration in research devoted to non-fluorinated polymer membranes, both as competitive alternatives to commercial perfluorosulfonic acidExpand
Polymorphism and mechanical properties of syndiotactic polystyrene films
Abstract The dynamic–mechanical behaviour and the tensile moduli of unstretched and stretched semicrystalline s-PS films, presenting different polymorphic forms (α, γ, δ and clathrate) but similarExpand
Polymeric sensing films absorbing organic guests into a nanoporous host crystalline phase
Abstract Syndiotactic polystyrene (s-PS) semicrystalline films, including the nanoporous crystalline δ phase, have been tested as sensing elements of resonant sensors for vapors of volatile organicExpand
...
1
2
3
4
5
...