Anhydride

Distribution by Scientific Domains
Distribution within Polymers and Materials Science

Kinds of Anhydride

  • acetic anhydride
  • acid anhydride
  • benzoic anhydride
  • carboxylic anhydride
  • cyclic anhydride
  • diphthalic anhydride
  • isatoic anhydride
  • maleic anhydride
  • methacrylic anhydride
  • oxydiphthalic anhydride
  • phthalic anhydride
  • succinic anhydride
  • trifluoroacetic anhydride
  • trimellitic anhydride

  • Terms modified by Anhydride

  • anhydride copolymer
  • anhydride groups

  • Selected Abstracts


    Reactive blending of poly (dimethylsiloxane) with nylon 6 and poly (styrene):Effect of reactivity on morphology

    POLYMER ENGINEERING & SCIENCE, Issue 4 2001
    M. Mari
    Reactive compatibilization was used to control and stabilize 20,30wt% poly(dimethylsioxane) (PDMS) dispersions in nylon 6 (PA) and poly(styrene) (PS), respectively. The effect of the type of reation (amine (NH2)/anhydride (An), NH2/ epoxy(E) and carboxylic acid (COOH)/E) on the morphology was studied with electron microscopy. PS and PDMS have mutual solvents thus it was possible to use gel permeation chromatography (GPC) to determine the concentration of block copolymer in PS/PDMS blends. Reactive blending of PA6 with difunctional PDMS-(AN)2 did not decrease the PDMS particle size compared to the non-reactive blend (,10,m). Particle size decreaeased significantly to about 0.5 ,m when PA6 was blended with a PDMS containing about 4 random An groups along the chain. For the PS/PDMS blends, GPC revealed that the NH2/An reaction formed about 3% block copolymer and produced stable PDMS particles , 0.4 ,m. No reaction was detected for the PS-NH2/PDMS-E blend and the morphology was coarse and unstable. Also, PS-NH2/PDMS-An reactivity was lower compared to other systems such as PS/ poly (isoprene) and PS/poly(methaacrylte) using the same reaction. This was attributed to the relatively thinner PS/PDMS interface dueto the high PS/PDMs immiscibility. [source]


    Dip-Pen Nanolithography Using the Amide-Coupling Reaction with Interchain Carboxylic Anhydride- Terminated Self-Assembled Monolayers,

    ADVANCED FUNCTIONAL MATERIALS, Issue 8 2006
    S. Chi
    Abstract Herein we report on a new type of dip-pen nanolithography (DPN), which utilizes an interfacial organic reaction,the amide-coupling reaction,between chemically activated surfaces and amine ink molecules transferred from an atomic force microscopy tip. As a representative of the chemically activated surfaces that could react with amine compounds, we formed a self-assembled monolayer terminating in interchain carboxylic anhydride (ICA) groups on gold, and generated chemically derived nanopatterns using alkylamines as ink molecules. Amine inks showed diffusive behavior similar to thiol inks on gold in conventional DPN, and the pattern sizes were controlled by changing the tip dwell times. In addition, nanopatterns of hydrolyzed ICAs were generated by taking advantage of the participation of the water meniscus in the DPN process and the chemical nature of the ICAs. [source]


    Chemoselective and Regiospecific Synthesis of Iminospiro- , -lactones from Maleic Anhydride or Citraconic Anhydride and Alkyl Isocyanides with Dialkyl Acetylenedicarboxylates

    HELVETICA CHIMICA ACTA, Issue 4 2010
    Mohammad Bayat
    Abstract Isocyanides, dialkyl acetylenedicarboxylates (=dialkyl but-2-ynedioates), and anhydrides such as maleic anhydride (=furan-2,3-dione) or citraconic anhydride (=3-methylfuran-2,3-dione) react in one pot to afford novel iminospiro- , -lactones in fairly good yields at room temperature (Schemes,1 and 3). [source]


    A Solvent Free Graft Copolymerization of Maleic Anhydride onto Cellulose Acetate Butyrate Bioplastic by Reactive Extrusion

    MACROMOLECULAR MATERIALS & ENGINEERING, Issue 1 2006
    Arief C. Wibowo
    Abstract Summary: Interfacial adhesion between fibers and matrix is a crucial factor for effective stress transfer from matrix to fiber; especially in short fiber reinforced composite systems. The use of a chemical compatibilizer is an efficient means to achieve such adhesion. Maleic anhydride-grafted-cellulose acetate butyrate (CAB-g-MA) is one such compatibilizer which can be used in biocomposite fabrication, and this has been synthesized in our laboratory by utilizing a twin-screw reactive extrusion process in the presence of a free radical initiator (2,5-dimethyl-2,5-di(tert -butylperoxy)hexane). The unique feature of this process is its solvent-free approach for grafting of maleic anhydride onto CAB, without hydroxyl group protection. CAB-g-MA was characterized using FTIR as well as by a non-aqueous titration method. The effects of initiator and monomer concentrations and various processing conditions on the graft content were also investigated. The preliminary results show that by adding approximately 10 wt.-% of CAB-g-MA into a plasticized cellulose acetate butyrate (TEB)-industrial hemp fiber biocomposites system, an improvement in tensile strength (20%) and in tensile modulus (45%) were obtained. These results are promising in that they pave the way for future studies involving the use of CAB-g-MA as a suitable compatibilizer for cellulose ester-natural fiber biocomposites. [source]


    Ultrasonically Initiated Grafting of Maleic Anhydride onto Poly(propylene)

    MACROMOLECULAR REACTION ENGINEERING, Issue 1 2007
    Xiumin Tan
    Abstract This paper presents the studies on the grafting of MAH onto PP performed in solution by means of ultrasonic initiation. The effect of sonic intensity and monomer concentration on the amount of grafted MAH was investigated. It was found that grafting reaction could be initiated by ultrasound at ambient temperatures in the absence of an initiator. The quantity of product grafted was found to be 1.35%. It has been shown that optimum conditions for grafting are reached at an ultrasonic intensity of 300 W and a MAH concentration of 30%. PP- g -MAH is characterized by FTIR and XRD. DSC shows that the crystallinity of PP- g -MAH is lower than that of pure PP. [source]


    Oxidation of Benzene to Maleic Anhydride in a Fluidized Bed Reactor

    CHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 12 2007
    C. Uraz
    Abstract In this project, the selective oxidation of benzene to maleic anhydride (MAN) was studied. Gas phase catalytic oxidation of benzene was carried out in a laboratory scale fluidized bed reactor on six different types of catalysts, which have different compositions. Effects of temperature, flow rates of benzene and air and catalyst type on the reaction selectivity were investigated at atmospheric pressure. The experiments were performed over a temperature range of 325 to 400,C, a space-time (W/FA0) range from 11.28,,105 to 31.9,,105 g,s,mol,1, and benzene/air mole ratio changes between 0.0109 and 0.0477. It was seen that conversion of benzene to MAN increased with increasing temperature for the catalysts supported by silica gel, aluminum oxide and titanium oxide. From the results it was found that conversion increased with increasing flow rate of air. When the comparison of the catalysts were made, it could be said that catalysts supported by silica gel showed higher MAN conversions. So it can be concluded that catalysts supported by silica gel were more suitable catalysts for benzene oxidation to MAN in a fluidized bed reactor. [source]


    ChemInform Abstract: T3P (Propylphosphonic Anhydride) Mediated Conversion of Carboxylic Acids into Acid Azides and One-Pot Synthesis of Ureidopeptides.

    CHEMINFORM, Issue 35 2010
    Basavaprabhu Basavaprabhu
    Abstract The method is high-yielding and ecofriendly. [source]


    ChemInform Abstract: Solid Superacids as Catalysts for the Synthesis of Acylals from Aldehydes and Acetic Anhydride.

    CHEMINFORM, Issue 32 2010
    S. A. Lermontov
    No abstract is available for this article. [source]


    ChemInform Abstract: Modified Cinchona Alkaloid,Zinc Complex Catalysts: Enantioselective Monoacetylation of Glycerol Derivatives with Acetic Anhydride.

    CHEMINFORM, Issue 21 2010
    Shigeki Sano
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    ChemInform Abstract: An Effective Kinetic Resolution of Racemic Secondary Benzylic Alcohols Using 3-Pyridinecarboxylic Anhydride and a Chiral Acyl-Transfer Catalyst in the Absence of Tertiary Amine.

    CHEMINFORM, Issue 21 2010
    Kenya Nakata
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    ChemInform Abstract: Bismuth(III) Nitrate-Catalyzed Solvent-Free Acetylation of Alcohols and Phenols with Acetic Anhydride.

    CHEMINFORM, Issue 9 2010
    M. M. Heravi
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    ChemInform Abstract: Thiomaleic Anhydride: A Convenient Building Block for the Synthesis of ,-Substituted ,- and ,-Lactones Through Free-Radical Addition, Nucleophilic Ring Opening, and Subsequent Thiocarboxylate Manipulation.

    CHEMINFORM, Issue 4 2010
    David Crich
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    ChemInform Abstract: One-Pot Three Components Synthesis of O-Acetylcyanohydrins with TMSCN, Acetic Anhydride and Carbonyl Compounds under Solvent-Free Condition.

    CHEMINFORM, Issue 46 2009
    Santosh T. Kadam
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    ChemInform Abstract: A Preparation of 3,3-Difluoropyruvate from Trifluoroacetic Anhydride.

    CHEMINFORM, Issue 45 2009
    Toshimasa Katagiri
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    ChemInform Abstract: Synthesis of Novel 1,4-Benzoxazine-2,3-dicarboximides from Maleic Anhydride and Substituted Aromatic Amines.

    CHEMINFORM, Issue 25 2009
    Peng Wu
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    ChemInform Abstract: Unexpected Novel Rearrangement Reaction: Synthesis of Benzo-Medium-Ring Anhydride.

    CHEMINFORM, Issue 38 2008
    Wen-Liang Dong
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    ChemInform Abstract: New Synthetic Approach to Epoxyisoindolo[2,1-a]quinolines Based on Cycloaddition Reactions of 2-Furyl-Substituted Tetrahydroquinolines with Maleic Anhydride and Acryloyl Chloride.

    CHEMINFORM, Issue 10 2008
    F. I. Zubkov
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    Rhodium-Catalyzed Enantioselective Desymmetrization of meso-3,5-Dimethyl Glutaric Anhydride: A General Strategy to syn-Deoxypolypropionate Synthons.

    CHEMINFORM, Issue 50 2007
    Matthew J. Cook
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]


    Studies on the Intramolecular Cyclizations of Bicyclic ,-Hydroxynitriles Promoted by Triflic Anhydride.

    CHEMINFORM, Issue 37 2007
    Valeria Justribo
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]


    Palladium-Catalyzed Hydroxycarbonylation of Aryl and Vinyl Bromides by Mixed Acetic Formic Anhydride.

    CHEMINFORM, Issue 4 2007
    Philippe Berger
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]


    Reaction Between Phosphines and Itaconic Anhydride in the Presence of Water: An Efficient One-Pot Synthesis of 5-Oxo-1,2,5 -oxaphospholanes.

    CHEMINFORM, Issue 29 2006
    Mohammad Bagher Teimouri
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]


    Asymmetric Epoxidation of N-Enoylsultams with Urea-Hydrogen Peroxide/Trifluoroacetic Anhydride.

    CHEMINFORM, Issue 16 2006
    Shu Jia Zhang
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]


    Hydrolysis of Amides to Carboxylic Acids Using Phthalic Anhydride under Microwave Irradiation and Solvent-Free Conditions.

    CHEMINFORM, Issue 36 2005
    Majid.
    No abstract is available for this article. [source]


    Facile One-Pot Syntheses of Amidines and Enamines from Oximes via Beckmann Rearrangement Using Trifluoromethansulfonic Anhydride.

    CHEMINFORM, Issue 33 2004
    Tomofumi Takuwa
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]


    Steric Effects in the Nucleophilic Addition of Pyrazoles Unsubstituted at a Nitrogen Atom to the Double Bond of Maleic Anhydride.

    CHEMINFORM, Issue 33 2004
    N. L. Nam
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]


    Palladium-Catalyzed Hydroxycarbonylation of Aryl and Vinyl Halides or Triflates by Acetic Anhydride and Formate Anions.

    CHEMINFORM, Issue 12 2004
    Sandro Cacchi
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]


    Palladium-Catalyzed Reaction of Aryl Iodides with Acetic Anhydride.

    CHEMINFORM, Issue 24 2003
    A Carbon Monoxide Free Synthesis of Acetophenones.
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]


    ChemInform Abstract: About the Path of Acylation Reaction of 5,5-Dimethylhydantoin with Acetic Anhydride.

    CHEMINFORM, Issue 31 2001
    G. V. Bazanova
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


    Synthesis of a New Seleninic Acid Anhydride and Mechanistic Studies into Its Glutathione Peroxidase Activity

    CHEMISTRY - A EUROPEAN JOURNAL, Issue 23 2008
    Sun-Chol Yu Dr.
    Abstract Starting from low toxic salicyloylglycine, a new seleninic acid anhydride 7 that lacks Se,,,N or Se,,,O non-bonded interactions was synthesized. This compound exhibits a fourfold higher glutathione peroxidase-like (GPx-like) activity than ebselen and inhibits plant and mammalian 12/15-lipoxygenases at lower micromolar concentrations. Because of these pharmacological properties, 7 may constitute a new lead compound for the development of anti-inflammatory low-molecular-weight seleno-organic compounds. Analyzing the redox products of 7 with glutathione (GSH) and tBuOOH, we identified three potential catalytic cycles (A, B, C) of GPx-like activity that are interconnected by key metabolites. To study the relative contribution of these cycles to the catalytic activity, we prepared selected reaction intermediates and found that the activity of seleninic acid anhydride 7 and of the corresponding diselenide 11 and selenol 14 compounds were in the same range. In contrast, the GPx-like activity of monoselenide 9 was more than one order of magnitude lower. These data suggested that cycles A and B may constitute the major routes of GPx-like activity of 7, whereas cycle C may not significantly contribute to catalysis. [source]


    Homopolymerization and Copolymerization of Adipic Anhydride with , -Caprolactone Catalyzed by Rare Earth Trisphenolate

    CHINESE JOURNAL OF CHEMISTRY, Issue 3 2007
    Feng Chen
    Abstract The ring-opening polymerization of adipic anhydride and the ring-opening copolymerization of adipic anhydride with , -caprolactone catalyzed by single component rare earth trisphenolate have been reported. The structure of the copolymer poly(CL- b -AA) has been characterized by SEC, 1H NMR and DSC. [source]