Last edited by Dilmaran
Monday, April 27, 2020 | History

4 edition of Polyamic acids and polyimides found in the catalog.

Polyamic acids and polyimides

synthesis, transformations, and structure

by

  • 235 Want to read
  • 33 Currently reading

Published by CRC Press in Boca Raton .
Written in English

    Subjects:
  • Polyimides.

  • Edition Notes

    Includes bibliographical references and index.

    Statementeditors, Michael I. Bessonov and Vladimir A. Zubkov.
    ContributionsBessonov, M. I., Zubkov, Vladimir A.
    Classifications
    LC ClassificationsTP1180.P66 P6112 1993
    The Physical Object
    Pagination373 p. :
    Number of Pages373
    ID Numbers
    Open LibraryOL1722622M
    ISBN 100849367042
    LC Control Number92026113

    Linear polyimides are commonly synthesized by a two-step procedure via a polyimide precursor. The precursor (polyamic acid) is prepared from an aromatic dianhydride and an aromatic diamine in solution at room temperature. The precursor is transformed into a polyimide using thermal or chemical imidization. HBPIs are often prepared from a Author: Petr Sysel. Abstract. A series of polyimides (PI) containing bridged linkages were prepared successfully through a three-step technique. The results indicated that the glass transition temperature of polyimides was affected by flexibility of polymer chain and the intermolecular -TPER-based polyimide possesses the lowest, which was °C. All polyimides had semicrystalline Cited by: 1. acids) and polyimides in two different solvents and intermediate stages were not investigated. This 6F-BDAF system was soluble in the M LiBr/DMAc solvent at all stages of cure to °C, although overnight dissolution was required for films heated above °. A very slight gelation noted with the °C specimen cleared with two-day File Size: KB.


Share this book
You might also like
Alice in Quantumland

Alice in Quantumland

art of William Blake.

art of William Blake.

Tinkers Island

Tinkers Island

Tasks required of automotive service industry technicians in the year 2000.

Tasks required of automotive service industry technicians in the year 2000.

Naked came the manatee

Naked came the manatee

Claudius the God

Claudius the God

Treason, Sedition and Allied Offences (Working paper - Law Commission ; no. 72)

Treason, Sedition and Allied Offences (Working paper - Law Commission ; no. 72)

Language: selected readings

Language: selected readings

There and gone

There and gone

Navigation and astronomy for students

Navigation and astronomy for students

Friedenthal, Miller, Sexton And Hershkoffs Cases And Materials on Civil Procedure, 2006 Supplement (American Casebook Series)

Friedenthal, Miller, Sexton And Hershkoffs Cases And Materials on Civil Procedure, 2006 Supplement (American Casebook Series)

true nature of a gospel church and its government (1689)

true nature of a gospel church and its government (1689)

Polyamic acids and polyimides Download PDF EPUB FB2

The book will be an excellent reference for researchers, practitioners, and graduate students working with polyimides and related heat-resistant polymers and materials. Table of Contents Polyimide Synthesis by Chemical Cyclization of Polyamic Acids (V.V.

Kudryavtsev). Polyamic Acids and Polyimides surveys significant developments in basic research in the chemistry and physics of polyamic acids and polyimides over the last several years. Traditional and new topics are discussed, including catalytical imidization, chemical reactions at thermal treatment, quantum-chemical study of synthesis and structure Cited by: Surveys developments in basic research in the chemistry and physics of polyamic acids and polyimides.

This book discusses topics including catalytical imidization, chemical reactions at thermal Read more. Polyimides are used as organic insulators, as adhesives, as coat­ ings, in composites, just to name a few of their uses.

Even a casual search of the literature will underscore the importance of this class of materials and the high tempo of R&D activity taking place in the area of polyimides.

Most polyimides are aromatic diamine and dianhydride compositions. However, by changing the diamine and dianhydride substitutes, one derives a variety of high performance polyimides.

Polyamic acids are precursors of the polyimides. Thermal cyclization of polyamic acid. pyrrolidone (NMP). This reaction yields a soluble polyamic acid which is often referred to as a prepolymer (fig. In the second step, water is eliminated from the polyamic Polyimide Figure 1.

-General synthetic scheme for polyimides. acid, by thermal or chemical means, to form the cyclic polyimide. This polymer in itsFile Size: KB.

In this study we have investigated these and other characteristics of the polyamic acid and polyimide formed from the condensation of pyromellitic dianhydride and 4,4′-diaminodiphenylether. The polyamic acids were studied in solution using various solvents, and the cured polyimide was studied in concentrated sulfuric acid.

Abstract. A fundamental understanding of the structure of the cured polyimide and the precursor polyamic acid from the condensation of pyromellitic dianhydride and 4,4′-diaminodiphenylether has been obtained through the use of several dilute solution techniques on samples prepared and Cited by: Predicting crystalline polyamic acids as precursors to porous polyimides A.

Trewin, CrystEngComm,12, DOI: /CB. Provides coverage on the full range of topics associated with polyimides, including structure, polymer fundamentals, and product areas.

The text addresses both basic and applied aspects of the subject. It details the synthesis of polyimides, polyamideimides, and flourinated polyimides, explains the molecular design of photosensitive polyimides, and more.5/5(1). Volksen, in Encyclopedia of Materials: Science and Technology, Polyimides represent a very diverse group of materials ranging from homopolymers of various chemical structures to polyimide blends and segmented block copolymers.

The initial goal of arriving at a class of materials with high thermo-oxidative stability and excellent mechanical properties has been surpassed beyond all. A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.

Get this from a library. Polyimides: synthesis, characterization, and applications. [K L Mittal; Society of Plastics Engineers. Mid-Hudson Section.;] -- This and its companion Volume 2 chronicle the proceedings of the First Technical Conference on Polyimides: Synthesis, Char­ acterization and Applications held under the auspices of the Mid­ Hudson.

Polyimides (PI) exhibit very good chemical, mechanical and dielectric stability at temperatures from – to C. These rigid polymers with a high glass transition temperature are mostly used in (micro)electronics, aircraft industry, space exploration and as polymeric separation membranes.

Linear polyimides (LPI) are traditionally prepared byFile Size: 25MB. II: Properties and Characterization.- Dielectric and Chemical Characterization of the Polyimide, LARC Characterization of Polyimides and Polyamic Acids in Dilute Solution.- Polyimide Cure Determination.- In-situ Monitoring of Polyamic Acid Imidization with Microdielectrometry.- Studies on Thermal Cyclization of Polyamic Acids The present invention relates to a polyimide insulator film made from a low temperature curable polyamic resin composition and an all-organic thin film transistor using the same.

More specifically, the present invention relates to an all-organic thin film transistor device, wherein an aromatic tetracarboxylic dianhydride having a high packing structure and an aromatic diamine monomer are Author: 이미혜, 안택, 최유정, 정현민. Review of the authors’ works on the synthesis of polyimides (PIs) by the method of one-stage high-temperature polycondensation in an unusual solvent—molten benzoic acid (BA).

Compared with a known synthesis in inert high-boiling solvents, synthesis in BA takes place under mild conditions (°C, 1–2 hour) to give completely imidized : Kuznetsov Alexander Alexeevich, Tsegelskaya Anna Yurievna.

Abstract. The polyimide precursor (polyamic acid) produced of -oxydiphthalic anhydride and -oxydianiline was electrospun using needleless electrospinning en layers consisting of submicron fibers with diameters in the range about – nm on Cited by: The effect of new additives on the thermal conversion of a range of polyamic acids to polyimides at temperatures lower than °C was investigated using infrared spectroscopy.

USA US06/, USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords process polyamic acid aromatic dianhydride dianhydride solid Prior art date Legal status (The legal status is an assumption and is not a legal by: 7.

Polyamic acid (PAA) salts are amenable to photocuring additive manufacturing processes of all-aromatic polyimides.

Due to an all-aromatic structure, these high-performance polymers are exceptionally chemically and thermally stable but are not conventionally processable in their imidized form. The facile addition of 2-(dimethylamino)ethyl methacrylate (DMAEMA) to commercially available poly(4,4 Cited by:   With that, the inventors have further studied the compositions of these NBDA isomers and the properties of the polyamic acids and the polyimides produced from them, and have found out the polyimide of the present invention which naturally has the good properties inherent to polyimides and additionally has further improved and controlled thermal.

either polyamic acid or pre-imidized polyimide solution onto glass substrates where thin film tran-sistor (TFT) and color filter (CF) patterns are already prepared.

With the thermal curing process at a high temperature thin films of polyimides are formed on the glass substrate and are subjected to the rubbing process for creating an alignment path.

Polyamic acids (PAA) were synthesized by solution polycondensation of aromatic diamine with dianhydride and PAA were readily soluble in polar organic solvents (N-methylpyrrolidinone, N, N-dimethylacetamide and DMF). It was found that the most appropriated reaction conditions of synthesis of PAA solution were the ratio of dianhydride with diamine being and 3h reaction time at ambient Cited by: 1.

Polyamic acids, which may precipitate upon cyclization due to the increase in chain rigidity, are generally cast from solution and thermally imidized in a film form, which is also known as “bulk imidization”. Commercial examples of polyimides produced by this route include the Kapton family from DuPont (Figure ).

Polyimides are produced mainly by polycondensation of tet-racarboxylic acids and their derivatives, mainly dianhydrides (most often those of pyromellitic acid and 3, 4, 3′, 4′-benzo-phenonetetracarboxylic acid), with diamines (for example, bis[4-aminophenyl] ether and.

Slight signs of wear on the cover. Edition Ammareal gives back up to 15% of this book's net price to charity organizations. Seller Inventory # B More information about this seller | Contact this seller Polyamic Acids and Polyimides.

Michael I. Bessonov. Published by CRC Press () ISBN ISBN. Polyimide Membranes: Applications, Fabrications and Properties - CRC Press Book This is a first attempt to provide a general analysis of developments in polyimide membrane synthesis and applications.

It will serve as a valuable reference for those with an interest in synthesis of polyimides, the chemistry and physical chemistry of polyimide. Book Description. This is a first attempt to provide a general analysis of developments in polyimide membrane synthesis and applications.

It will serve as a valuable reference for those with an interest in synthesis of polyimides, the chemistry and physical chemistry of polyimide compounds, the separation properties of membranes and in their preparation and application.

Polyimides (PI), a class of high-performance materials, have been widely used as electrical insulators, coatings, adhe-sives, substrates for flexible printed circuits, and alignment films for liquid crystal displays due to their high temperature stability, excellent mechanical properties and good chemical resistance.

Studies of thermal cyclizations of polyamic acids and tertiary amine salts. John A. Kreuz.Effect of curing accelerators on thermal imidization of polyamic acids at low temperature, JournalKinetics and Mechanism of Thermal Cyclization of Polyamic Acids, Polyimides, /.

Linear polyimides (LPI) are traditionally prepared by the two-step polymerization. The polyimideprecursor, polyamic acid (PAA) (the most often a solution in N-methylpyrrolidone), is prepared from an aromatic dianhydride and an aromatic diamine. This precursor is transformed into a polyimide using thermal or chemical imidization (Figure 2).Cited by: 2.

The applications of polyimides range from aerospace to microelectronics to medical field, and this is attributed to the fact that polyimides offer certain desirable traits, inter alia, high temperature stability.

Polyimides are used as organic insulators, as adhesives, as coat­ ings, in composites, just to name a Format: Paperback. Search results for polyamic acid at Sigma-Aldrich. Compare Products: Select up to 4 products. *Please select more than one item to compare. Polyimides O O C C C C H 2NR NH 2 + OR' R N R' N C C C O O O O Staged formation of Polyimides Stage 1: Formation of polyamic acid H 2N O NH 2 + HO C C C O O O O O ring strain O O O more reactive H 2N O H N C O O H N C O HOC C COH O H N HOC C.

After a description of the preparation of polymer-metal oxide hybrid materials via the sol-gel method, recent results on the preparation of new polyimide-silica hybrid materials are reviewed.

Tetraethoxysilane (TEOS) can be hydrolysed and polycondensed to form a three-dimensional silica-gel network in a solution of polyamic acids, the precursor polymers of polyimides, and N,N-dimethylacetamide.

POLYAMIC ACID, POLYIMIDE RESIN AND POLYIMIDE FILM. United States Patent Application Kind Code: A1. Abstract: Disclosed is a polyamic acid, which is a polymerized product of a diamine and a dianhydride, wherein the diamine includes 9,9-bis(3-fluoroaminophenyl)fluorene (FFDA), and the dianhydride includes 2-bis(3,4 Cited by: 2.

@article{osti_, title = {Effects of mechanical properties of metal films on the adhesion strength of Cr/polyimide interfaces}, author = {Choi, J W and Oh, T S}, abstractNote = {Thin film packaging is one of the key technologies to develop advanced electronic systems such as computers and telecommunication systems.

Effects of mechanical properties of Cu/Cr metal films on the peel strength. The course of imidization of the polyamic acids both by thermal and microwave treatments was tracked by infrared spectroscopy. The mechanical properties, namely the tensile strength and toughness of the films of polyimides with varying degree of imidization obtained by the two treatments were compared.

Purchase Ring-Forming Polymerizations Pt B 2 - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1. Polyimide films have been widely used as high-performance polymer materials in flexible printed circuit boards, heat-releasing sheets, and organic light-emitting diode displays due to their excellent heat resistance, chemical resistance, electric characteristics, and mechanical strength [1,2,3].There has recently been an intense effort to improve the mechanical properties of the polyimide Cited by: 1.University of Massachusetts Amherst [email protected] Amherst Doctoral Dissertations - February The determination of the mechanical behavior ofCited by: 2.Kapton is a polyimide film developed by DuPont in the late s that remains stable across a wide range of temperatures, from − to + °C (− to °F; 4 to K).

Kapton is used in, among other things, flexible printed circuits (flexible electronics) and space blankets, which are used on spacecraft, satellites, and various space instruments.