Ángel E. Lozano 교수

A new generation of porous polymer networks has been obtained in quantitative yield by reacting two rigid trifunctional aromatic monomers (1,3,5-triphenylbenzene and triptycene) with two ketones having electron-withdrawing groups (trifluoroacetophenone and isatin) in superacidic media. The resulting amorphous networks are microporous materials, with moderate Brunauer-Emmett-Teller surface areas (from 580 to 790 m² g^-1), and have high thermal stability. In particular, isatin

A new nucleophilic monomer (2,2-bis(3-amino-4-hydroxyphenyl)adamantane, ADHAB) having bulky adamantane groups has been synthesized following an efficient synthetic methodology. The main target of this work was to employ a high thermal stable bulky cycloaliphatic moiety as adamantane to obtain aromatic ortho-hydroxypolyimides (poly(o-hydroxyimide)s) able to thermally rearrange to give polybenzoxazole (TR-PBO) materials that could be tested as gas separation membranes. Thus, an array of ortho-acet

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSynthesis of Aromatic Polyisophthalamides by in Situ Silylation of Aromatic Diamines†Angel E. Lozano, Javier de Abajo, and José G. de la CampaView Author Information Instituto de Ciencia y Tecnología de Polímeros, C.S.I.C. Juan de la Cierva 3, 28006 Madrid, SpainCite this: Macromolecules 1997, 30, 8, 2507–2508Publication Date (Web):April 21, 1997Publication History Received21 October 1996Revised29 January 1997Published online21 April 1997Published inissue

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical Study of the Synthesis of Aromatic Polyethers by the Nucleophilic Aromatic Substitution between Fluoro Aromatic Compounds and PhenoxidesAngel E. Lozano, M. Luisa Jimeno, Javier de Abajo, and Jose G. de la CampaCite this: Macromolecules 1994, 27, 24, 7164–7170Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue 1 November 1994https://pubs.acs.org/doi/10.1021/ma00102a026https://doi.org/10.10

Abstract A series of polyisophthalamides having pendent oligomeric benzamide groups were prepared by the Yamazaki reaction from common aromatic diamines and 5‐(4‐benzoylamino‐1‐benzoylamino)isophthalic acid. The latter was synthesized from 5‐aminoisophthalic acid in a three‐step synthesis by successive incorporation of benzamido groups. The new polymers were characterized by NMR, DSC, TGA, and WAXD and the properties were compared to those of corresponding unsubstituted polyisophthalamides. All

Abstract Soluble polyimides were prepared from suitable monomers and were evaluated for their thermal and mechanical properties. The polymers were processed into films for use as supports for transparent, conductive indium tin oxide (ITO) layers. After deposition, annealing in vacuo at temperatures up to 400°C was performed to test the ability of the materials to endure typical device fabrication temperatures without damage to the ITO‐coated polymeric substrate. The evolution of the structural,

Abstract A set of new aromatic poly(ether amide)s containing benzimidazole groups and ethylene oxide sequences of different lengths were synthesized and characterized. The new polymers were prepared from two benzimidazole diamines, 2‐(4‐aminophenyl)‐5‐aminobenzimidazole and 2‐(3‐aminophenyl)‐5‐aminobenzimidazole, and various oligo(ethylene oxide)dibenzoyl chlorides. They exhibited good solubility in polar aprotic solvents and glass‐transition temperatures in the range of 125–300 °C (the longer t

Mixed matrix membranes (MMMs) have been obtained by blending an aromatic ortho-hydroxypolyimide (PIOH) or an ortho-acetylpolyimide (PIOAc) with different loading amounts (15 and 30 wt %) of a microporous polymer network (PPN), which was obtained from the reaction of triptycene and isatin. The excellent thermal resistance of the PPN (above 500 °C) allowed it to be used as a filler to successfully prepare thermally rearranged polybenzoxazole (TR-PBO)-MMMs obtained from the thermal treatment of the

<italic>ortho</italic>-Methoxypolyimides were prepared from 3,3ʹ-dimethoxybenzidine (DMAB) and hexafluoroisopropylidene diphthalic anhydride (6FDA).

Abstract A series of polyisophthalamides containing pendent phenylthio groups was prepared from seven aromatic diamines and 5‐phenylthioisophthalic acid by the phosphorylation polycondensation method. The properties of these polymers were compared with those of the analogous unmodified ones. The modified polymers exhibited better solubility in organic solvents than their unmodified counterparts. They also showed glass transition temperatures that were lower by approximately 30°C. However, the pr