Abstract Colorless-to-colorful switching electrochromic polymers with very high contrast ratio are unattainable and attractive for the applications of smart wearable electronics. Here we report a facile strategy in developing colorless-to-colorful polyimides by incorporating alicyclic nonlinear, twisted structures adjusted conjugated electrochromophores, which minimize charge transfer complex formation. It is noted that, controlling conjugation length electrochromophore, colorless-to-black...

The device under testing was a plastic dynamic random access memory based on donor-functionalized polyimide (TP6F-PI), which exhibited the ability to write, read, erase, and refresh electrical states. had an ON/OFF current ratio up 105, promising minimal misreading error. Both off states were stable constant voltage stress of 1 V survived 108 read cycles at V.

A new triphenylamine-containing diamine monomer, 4,4'-diamino-3' ',4' '-dimethyltriphenylamine (DADT), was successfully synthesized by the cesium fluoride-mediated condensation of 3,4-dimethylaniline with 4-fluoronitrobenzene, followed reduction. The monomer reacted various aromatic dicarboxylic acids and tetracarboxylic dianhydrides to produce a series novel polyamides polyimides, respectively. acid 4,4'-trimellitimido-3' (TDT), refluxing diamine, DADT, trimellitic anhydride in glacial...

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTHigh Thermal Stability and Rigid Rod of Novel Organosoluble Polyimides Polyamides Based on Bulky Noncoplanar Naphthalene−BiphenyldiamineDer-Jang Liaw, Feng-Chyuan Chang, Man-kit Leung, Meng-Yen Chou, Klaus MuellenView Author Information Department Chemical Engineering, National Taiwan University Science Technology, Taipei, Taiwan, ROC; Chemistry, University, Max-Planck-Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany Cite this:...

As an emerging area in organic electronics, polymer memories have become active research topic recent years. Polymer based on bistable electrical switching are likely to be alternative or supplementary technology the conventional memory facing problem miniaturizing from micro- nano-scale. In this article, account of our work a series processable electroactive polymers is given. The can provide required electronic properties within single macromolecule for device applications. Bistable...

A new diamine containing a pyridine heterocyclic group and pyrene substituent, 4-(1-pyrene)-2,6-bis(4-aminophenyl)pyridine (PBAPP), was synthesized used in preparation of poly(pyridine−imide) by direct polycondensation with 4,4'-hexafluoroisopropylidenediphathalic anhydride (6FDA) N-methyl-2-pyrrolidinone (NMP). The derived from (PBAPP) highly soluble several solvents such as THF, NMP, DMAc, DMF, pyridine, DMSO, cyclohexanone at room temperature or upon heating 70 °C exhibited good thermal...

Compared with traditional thermosets, malleable thermosets have more applications in aerospace, biotechnology, and construction. Here we report a one-step, solvent-free, catalyst-free polycondensation method between diamine formaldehyde to prepare series of hemiaminal dynamic covalent networks (HDCNs). The materials excellent malleability reprocessability by hot pressing. Young's modulus breaking strength HDCNs obtained the 4,4-diaminodiphenylmethane (MDA) are as high 1.6 GPa 60 MPa,...

New soluble polyimides were prepared from a series of diamines and tetracarboxylic dianhydride with benzhydrol unit, 3,3',4,4'-benzhydrol (BHTDA), by one-step method polymerization. The containing flexible units, bulky substituents, and/or noncoplanar conformation unit the reaction corresponding bisphenol precursors p-chloronitrobenzene, followed catalytic reduction dinitro compounds. obtained in various solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide, N,N-dimethylformamide,...

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTLight-Scattering Study of a Zwitterionic Polycarboxybetaine in Aqueous SolutionAizhen Niu, Der-Jang Liaw, Hui-Chuan Sang, and Chi WuView Author Information Department Chemistry, The Chinese University Hong Kong, Shatin, N. T., Kong; Chemical Engineering, National Taiwan Science Technology, Taipei, Taiwan; Open Laboratory Bond Selective Physics, Technology China, Hefei, Anhui, China Cite this: Macromolecules 2000, 33, 9, 3492–3494Publication Date...

Abstract The aqueous solution properties of an ampholytic poly[3‐dimethyl (methacryloyloxyethyl) ammonium propane sulfonate] [poly(DMAPS)] are studied by measurements cloud point determination, intrinsic viscosity, degree binding, and ionic strength. minimum salt concentration viscosity this polyampholyte related to the type added salt. Both polymeric monomeric betaines in presence NaCl have lower indicating that proton ion (H + ) is relatively difficult bind SO − 3 at end sulfobetaine. An...

A conjugated copolymer of 9,9-didodecylfluorene and 4-triphenylamino-2,6-bis(phenyl)pyridine (F12TPN), containing both electron donor acceptor moieties, was synthesized via Suzuki coupling polymerization. Polymer memory devices, based on thin films F12TPN its carbon nanotube composites, were fabricated. The current density-voltage characteristics the indium tin oxide (ITO)/F12TPN/Al sandwich structure could be switched from a low conductivity (off) state to high (on) state, when operated...

Thermally induced molecular graft copolymerization of the zwitterionic monomer, N,N'-dimethyl(methylmethacryloyl ethyl)ammonium propanesulfonate (DMAPS), with ozone-preactivated poly(vinylene fluoride) (PVDF) was carried out in a mixed solvent N-methyl-2-pyrrolidone (NMP) and dimethyl sulfoxide (DMSO). The chemical composition resulting PVDF grafted DMAPS polymer (PDMAPS) side chains, or PDMAPS-g-PVDF copolymers, analyzed by elemental analysis. An increase [DMAPS]/[-CH2CF2-] molar feed ratio...