Category

(Natural) polymers

(Natural) polymersCompositesCustomer publicationsParticle interactionsPolymer researchWAXS

Amino-functionalized breath-figure cavities in polystyrene–alumina hybrid films: effect of particle concentration and dispersion

V, Lakshmi; Raju, Annu; G, Resmi V.; Pancrecious, Jerin K.; D, Rajan T. P.; C, Pavithran

We report the formation of breath-figure (BF) patterns with amino-functionalized cavities in a BF incompatible polystyrene (PS) by incorporating functionalized alumina nanoparticles. The particles were amphiphilic-modified and the modifier ratio was regulated to achieve a specific hydrophobic/hydrophilic balance of the particles. The influence of the physical and chemical properties of…
Xenocs
12 March 2019
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsFractal dimensionMaterialPolymer researchSAXSTechniqueWAXS

Anomalies in the low frequency vibrational density of states for a polymer with intrinsic microporosity – the Boson peak of PIM-1

Zorn, Reiner; Yin, Huajie; Lohstroh, Wiebke; Harrison, Wayne; Budd, Peter M.; Pauw, Brian R.; Böhning, Martin; Schönhals, Andreas

Polymers with intrinsic microporosity are promising candidates for the active separation layer in gas separation membranes. Here, the vibrational density of states (VDOS) for PIM-1, the prototypical polymer with intrinsic microporosity, is investigated by means of inelastic neutron scattering. The results are compared to data measured for a more conventional…
Xenocs
12 March 2019
(Natural) polymersCustomer publicationsPhase analysisPolymer researchSAXS

Effect of high molecular weight on pore formation and various properties of microporous membrane used for lithium-ion battery separator

Xu, Guan; Ding, Lei; Wu, Tong; Xiang, Ming; Yang, Feng

In this article, iPP cast films with high molecular weight in middle layer were prepared to investigate the effect of high molecular weight component on pore formation and mechanical strength. The results of DSC, SEM and 2D-XRD indicated that higher molecular weight and die draw ratio (DDR) would not alter…
Xenocs
12 March 2019
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialNanoparticles & colloidsOil & gasParticlesPolymer researchPorous materialSAXSTechnique

Polymer-Grafted Nanoparticle Membranes with Controllable Free Volume

Bilchak, Connor R.; Buenning, Eileen; Asai, Makoto; Zhang, Kai; Durning, Christopher J.; Kumar, Sanat K.; Huang, Yucheng; Benicewicz, Brian C.; Gidley, David W.; Cheng, Shiwang; Sokolov, Alexei P.; Minelli, Matteo; Doghieri, Ferruccio

Polymer-based membranes play a key role in several industrially important gas separation technologies, e.g., removing CO2 from natural gas, with enormous economic and environmental impact. Here, we develop a novel hybrid membrane construct comprised entirely of nanoparticles grafted with polymers. These membranes are shown to have broadly tunable separation performance…
Xenocs
12 March 2019
(Natural) polymersApplicationCharacterizationCustomer publicationsLiquid crystalsMaterialPhase analysisPolymer researchSAXSTechnique

On the morphological behavior of ABC miktoarm stars containing poly(cis 1,4-isoprene), poly(styrene), and poly(2-vinylpyridine)

Chernyy, Sergey; Mahalik, Jyoti P.; Kumar, Rajeev; Kirkensgaard, Jacob Judas Kain; Arras, Matthias M. L.; Kim, Hyeyoung; Schulte, Lars; Ndoni, Sokol; Smith, Gregory S.; Mortensen, Kell; Sumpter, Bobby G.; Russell, Thomas P.; Almdal, Kristoffer

Fundamental understanding of microphase separation in ABC miktoarm copolymers is vital to access a plethora of nonconventional morphologies. Miktoarm stars based on poly(cis 1,4-isoprene) (I), poly(styrene) (S), and poly(2-vinylpyridine) (V) are model systems, which allow systematic studies of the effects of composition, chemical microstructure, and temperature on the thermodynamics of…
Xenocs
12 March 2019
(Natural) polymersCharacteristic dimensionCustomer publicationsGIWAXSRenewable energySelf-assembled material

Efficient perovskite photovoltaic devices using chemically doped PCDTBT as a hole-transport material

Wong-Stringer, Michael; Bishop, James E.; Smith, Joel A.; Mohamad, David K.; Parnell, Andrew J.; Kumar, Vikas; Rodenburg, Cornelia; Lidzey, David G.

It is shown that by chemically doping the carbazole-based conjugated polymer PCDTBT using the molecular materials TBP, LiTFSI and FK209, its conductivity can be increased by a factor of 105 times. Such doped PCDTBT films are used as a hole transport material (HTM) for standard architecture (CH(NH2)2PbI3)0.85(CH3NH3PbBr3)0.15 perovskite solar cells…
Xenocs
12 March 2019
(Hydro)gels(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSTechnique

Progression of the Morphology in Random Ionomers Containing Bulky Ammonium Counterions

Enokida, Joshua S.; Tanna, Vijesh A.; Winter, H. Henning; Coughlin, E. Bryan

Poly(isoprene-ran-dimethyloctylammonium styrenesulfonate) (P(I-ran-DMOASS)) copolymers with high molecular weights and dimethyloctylammonium styrenesulfonate (DMOASS) compositions ranging between 8 and 40 mol % (30 and 77 wt %) were synthesized via nitroxide-mediated polymerization. Thermal and viscoelastic characterization revealed distinct behaviors for the low (30–51 wt %) and high (56–77 wt…
Xenocs
12 March 2019
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsMaterialPolymer researchSAXSTechniqueWAXS

Adduct modified nano-clay mineral dispersed polystyrene nanocomposites as advanced corrosion resistance coatings for aluminum alloys

Raju, Annu; Lakshmi, V.; Vishnu Prataap, R. K.; Resmi, V. G.; Rajan, T. P. D.; Pavithran, C.; Prasad, V. S.; Mohan, S.

The present investigation is on processing of a series of clay polystyrene nanocomposite (CPS) coatings containing different adduct modified montmorillonite (Mt) for corrosion resistance coating applications. The corrosion properties were studied using potentiodynamic and electrochemical impedance spectroscopy measurements in 3.5wt% aqueous NaCl electrolyte. The CPS coatings offered enhanced…
sergio.rodrigues@xenocs.com
12 March 2019