Tuning the dielectric behavior of poly(vinylidene fluoride-co-vinyl alcohol) using a facile urethane-based crosslinking method

Abstract

Crosslinking poly(VDF-co-VA) copolymers leads to a change from ferroelectric to double hysteresis loop behavior when the crosslinking density is increased.

Reducing the crystallinity of high molecular weight poly (ethylene oxide) using ultraviolet cross‐linking for preparation of gas separation membranes

“…As the cross-linking of PEO drastically reduces the mobility and hinders the crystallization process, it brings smaller crystals and lowers crystallinity. 56 The reduction of crystallinity by the UV cross-linking of high molecular weight PEO (M w = 1 × 10 6 g/mol) in the presence of BP was shown, previously. 35 The changes in the crystallinity of the high molecular weight PEO, which induced by various techniques, are provided in Table 4.…”

Effect of Asymmetric Lobe Size on the Molecular Dynamics, Glass Transition, and Dielectric Behavior in Janus Nanoparticles

“…Among the strategies employed in tuning the dielectric properties of polymers and polymer composites, several could be mentioned: (i) blending different polymers with complementary dielectric constants, − (ii) introducing fillers (e.g., ceramics, carbon-based materials), and adjusting their surface chemistry to enhance dispersion and compatibility, − (iii) by controlled processing techniques, that align and orient the polymer chains and fillers; (iv) chemical functionalization of the polymer matrix that modifies the polarity of the chains and their intrachain and interchain interactions, or via cross-linking which affect polymer chain mobility, (v) phase separation of the polymers, − (vi) nanostructuring, etc.…”

Physical, Electrochemical, and Solvent Permeation Properties of Amphiphilic Conetwork Membranes Formed through Interlinking of Poly(vinylidene fluoride)-Graft-Poly[(2-dimethylamino)ethyl Methacrylate] with Telechelic Poly(ethylene glycol) and Small Molecular Weight Cross-Linkers

“…42 Meereboer et al reported the preparation of a cross-linked network of PVDF via polyurethane chemistry to obtain materials for capacitive energy storage applications. 35 Herein, a new route for the construction of PVDF, PDMAEMA, and PEG or PVDF, PDMAEMA, and small molecular weight di-halide-based dense APCN membranes for ion conduction and pressure-driven porous ultrafiltration (UF) solvent-resistant membranes has been revealed. The chemistry is based on the simple nucleophilic substitution reaction of tertiary amine groups of PDMAEMA and activated halide groups of PEG or α,α-dichloro-p-xylene (XDC).…”

“…PVDF is a high-performance polymer applied for the preparation of membranes, , coating materials, capacitive energy storage applications, and scaffold for bone regeneration . Hence, construction of APCNs from a commercially available PVDF may be an attractive option for incorporating specific properties by retaining the properties of the parent polymer.…”

“…25,26 The wide applicability of APCNs is attributed to their swelling in both polar and nonpolar solvents, 27 nanophase morphology, 24,28,29 solubilizing ability of both hydrophobic and hydrophilic guest molecules, and good mechanical properties even in a swollen state. 30,31 PVDF is a high-performance polymer applied for the preparation of membranes, 32,33 coating materials, 34 capacitive energy storage applications, 35 and scaffold for bone regener-ation. 36 Hence, construction of APCNs from a commercially available PVDF may be an attractive option for incorporating specific properties by retaining the properties of the parent polymer.…”