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Thermal behavior of poly(VDF-ter-TrFE-ter-CTFE) copolymers: Influence of CTFE termonomer on the crystal-crystal transitions

Bargain, François; Thuau, Damien; Panine, Pierre; Hadziioannou, Georges; Domingues Dos Santos, Fabrice; Tencé-Girault, Sylvie

Customer publications

Thermal behavior of poly(VDF-ter-TrFE-ter-CTFE) copolymers: Influence of CTFE termonomer on the crystal-crystal transitions

Bargain, François; Thuau, Damien; Panine, Pierre; Hadziioannou, Georges; Domingues Dos Santos, Fabrice; Tencé-Girault, Sylvie

Depending on their CTFE content (from 0 to 10 mol %), poly (VDF-ter-TrFE-ter-CTFE), poly(vinylidene fluoride-ter-trifluoroethylene-ter-chlorotrifluoroethylene) copolymers exhibit ferroelectric (FE) or relaxor ferroelectric (RFE) properties at low temperature whereas they all present paraelectric (PE) behavior at high temperature. This thermal evolution of their electro-active properties is…
Factors controlling the structure of syndiotactic polystyrene upon the guest exchange and guest extraction processes

Shaiju, P.; Bhoje Gowd, E.

Customer publications

Factors controlling the structure of syndiotactic polystyrene upon the guest exchange and guest extraction processes

Shaiju, P.; Bhoje Gowd, E.

The role of host preparation method on the structural phase transition of syndiotactic polystyrene (sPS) after the guest exchange process has been thoroughly investigated in our previous study using a series of n-alkanes . In addition to the host preparation method, we have found that guest molecules used for the…
Influences of Compression on the Mechanical Behavior and Electrochemical Performances of Separators for Lithium Ion Batteries

Yu, Yansong; Xiong, Bijin; Zeng, Fangxinyu; Xu, Ruizhang; Yang, Feng; Kang, Jian; Xiang, Ming; Li, Lu; Sheng, Xingyue; Hao, Zengheng

Customer publications

Influences of Compression on the Mechanical Behavior and Electrochemical Performances of Separators for Lithium Ion Batteries

Yu, Yansong; Xiong, Bijin; Zeng, Fangxinyu; Xu, Ruizhang; Yang, Feng; Kang, Jian; Xiang, Ming; Li, Lu; Sheng, Xingyue; Hao, Zengheng

Compression stress on thickness direction of separators exists in assembling and operation of all lithium ion batteries (LIBs). In this study, influences of compression on microporous morphologies, electrolyte uptake behavior, and electrochemical properties of three types of commercial separators (PP-U, PP-B, and PE-B) for LIBs manufactured via different processes, were…
Functionally Active Membrane Proteins Incorporated in Mesostructured Silica Films

Jahnke, Justin P.; Idso, Matthew N.; Hussain, Sunyia; Junk, Matthias J. N.; Fisher, Julia M.; Phan, David D.; Han, Songi; Chmelka, Bradley F.

Customer publications

Functionally Active Membrane Proteins Incorporated in Mesostructured Silica Films

Jahnke, Justin P.; Idso, Matthew N.; Hussain, Sunyia; Junk, Matthias J. N.; Fisher, Julia M.; Phan, David D.; Han, Songi; Chmelka, Bradley F.

A versatile synthetic protocol is reported that allows high concentrations of functionally active membrane proteins to be incorporated in mesostructured silica materials. Judicious selections of solvent, surfactant, silica precursor species, and synthesis conditions enable membrane proteins to be stabilized in solution and during subsequent coassembly into silica–surfactant composites with nano-…
Preparation and Properties of High-performance Polyimide Copolymer Fibers Derived from 5-Amino-2-(2-hydroxy-5-aminobenzene)-benzoxazole

Dai, Xue-Min; Gao, Hong; Zhang, Ran; Du, Zhi-Jun; Shi, Tong-Fei; Ji, Xiang-Ling; Qiu, Xue-Peng; Men, Yong-Feng

Customer publications

Preparation and Properties of High-performance Polyimide Copolymer Fibers Derived from 5-Amino-2-(2-hydroxy-5-aminobenzene)-benzoxazole

Dai, Xue-Min; Gao, Hong; Zhang, Ran; Du, Zhi-Jun; Shi, Tong-Fei; Ji, Xiang-Ling; Qiu, Xue-Peng; Men, Yong-Feng

A series of polyamic acid copolymers (co-PAAs) with para-hydroxyl groups was synthesized using two diamine monomers, namely p-phenylenediamine (p-PDA) and 5-amino-2-(2-hydroxy-5-aminobenzene)-benzoxazole (m-pHBOA), of different molar ratios through copolymerization with 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) in N,N-dimethyacetamine (DMAc). The co-PAA solutions were used to fabricate…
On-demand tuned hazard free elastomeric composites: A green approach

Manoharan, Partheban; Das, Narayan Chandra; Naskar, Kinsuk

Customer publications

On-demand tuned hazard free elastomeric composites: A green approach

Manoharan, Partheban; Das, Narayan Chandra; Naskar, Kinsuk

Rising ecological concerns and depletion of the potentially harmful environmental impacts caused by rubber products, are of prime importance in the industry. Therefore, implementation of sustainable greener materials is required to minimize the detrimental influences. In this research, we investigated the beneficial influence of naturally derived bio-resin toward the effects…
Stretching Temperature Dependency of Lamellar Thickness in Stress-Induced Localized Melting and Recrystallized Polybutene-1

Wang, Yaotao; Jiang, Zhiyong; Fu, Lianlian; Lu, Ying; Men, Yongfeng

Customer publications

Stretching Temperature Dependency of Lamellar Thickness in Stress-Induced Localized Melting and Recrystallized Polybutene-1

Wang, Yaotao; Jiang, Zhiyong; Fu, Lianlian; Lu, Ying; Men, Yongfeng

The structural parameters such as long spacing and thicknesses of crystalline lamellae and amorphous layers of polybutene-1 crystallized from quiescent melt at different isothermal temperatures and established by tensile stretching the isothermally crystallized samples at different temperatures via a stress induced localized melting and recrystallization process were determined by small-angle…
Self-assembly and mechanochromic luminescence switching of trifluoromethyl substituted 1,3,4-oxadiazole derivatives

Ongungal, Rahul M.; Sivadas, Aneesh P.; Kumar, N. S. Saleesh; Menon, Sajith; Das, Suresh

Customer publications

Self-assembly and mechanochromic luminescence switching of trifluoromethyl substituted 1,3,4-oxadiazole derivatives

Ongungal, Rahul M.; Sivadas, Aneesh P.; Kumar, N. S. Saleesh; Menon, Sajith; Das, Suresh

The synthesis, self-assembly and mechanochromic properties of a series of oxadiazole derivatives (TFOXD1, TFOXD4, TFOXD6 and TFOXD8) substituted with a dialkoxy stilbene and trifluoromethyl benzene moieties are reported. All the derivatives formed stable gels in aliphatic solvents and with the exception of TFOXD1 exhibited monotropic liquid crystalline behavior. The photophysical…
Effect of diamond nanoparticle chains on rheological properties of hydrosol

Kuznetsov, N. M.; Belousov, S. I.; Stolyarova, D. Yu.; Bakirov, A. V.; Chvalun, S. N.; Shvidchenko, A. V.; Eidelman, E. D.; Vul’, A. Ya.

Customer publications

Effect of diamond nanoparticle chains on rheological properties of hydrosol

Kuznetsov, N. M.; Belousov, S. I.; Stolyarova, D. Yu.; Bakirov, A. V.; Chvalun, S. N.; Shvidchenko, A. V.; Eidelman, E. D.; Vul’, A. Ya.

We have recently shown that the sol-gel transition occurs in hydrosol of detonation nanodiamond (DND) particles with size of 4–5 nm. Here we study properties of the hydrosol. Namely, we study the dependence of dynamic viscosity and shear stress on DND concentrations. Dynamic light scattering (DLS) and small-angle X-ray scattering (SAXS)…