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Investigations On The Effect Of The Basicity Of Diamines On The Synthesis Of Aromatic Polyamides By Dispersion Polycondensation
Download Investigations On The Effect Of The Basicity Of Diamines On The Synthesis Of Aromatic Polyamides By Dispersion Polycondensation full books in PDF, epub, and Kindle. Read online Investigations On The Effect Of The Basicity Of Diamines On The Synthesis Of Aromatic Polyamides By Dispersion Polycondensation ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Investigations on the Effect of the Basicity of Diamines on the Synthesis of Aromatic Polyamides by Dispersion Polycondensation by : T. Skwarski
Download or read book Investigations on the Effect of the Basicity of Diamines on the Synthesis of Aromatic Polyamides by Dispersion Polycondensation written by T. Skwarski and published by . This book was released on 1987 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Noncrystalline Aromatic Polyamides by : Tonson Abraham
Download or read book Synthesis of Noncrystalline Aromatic Polyamides written by Tonson Abraham and published by . This book was released on 1988 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noncrystalline thermooxidatively stable aromatic p olyamides were synthesized through the triphenyl phosphite-promoted polycondensations of 3,3-(sulfonylbis(1,4-phenylenoxy)) dibenzoic acid and 3,3(carbonylbis(1,4-phenylenoxy)) dibenzoic acid with 3,3-(1,3-phenylendioxy)dianiline. Alternatively, the polymers could be prepared through the low temperature polydensations in N-methylpyrollidone of the corresponding diacid chlorides with the aromatic diamine. An additional polyamide was synthesized through the self-condensation of 3-(4-(3-aminophenoxybenzoyl)phenoxy) benzoic acid. This previously unreported monomer had been prepared by a two-step reaction sequence from 4,4-difluorobenzophenone. Inherent viscosities in the range of 0.27-0.63 dl/g (N, N-dimethylacetamide, 30C, 0.2 g/d1) were obtained. Polymer structures were established by elemental analyses and infrared spectroscopy. Thermal characterization was carried out by differential scanning colorimetry, thermal gravimetric analysis, and isothermal aging. Keywords: Aromatic polyamide, Thermooxidative stability, Low glass transition temperature. (jes).
Book Synopsis The Synthesis of Alkoxy Substituted Aromatic Diamines as Polymer Precursors and the Synthesis and Characteriztion of Aromatic Alkoxy Substituted Polyamides, Polyimides and Polyureas by : Michael Stephen Bonner
Download or read book The Synthesis of Alkoxy Substituted Aromatic Diamines as Polymer Precursors and the Synthesis and Characteriztion of Aromatic Alkoxy Substituted Polyamides, Polyimides and Polyureas written by Michael Stephen Bonner and published by . This book was released on 1977 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis of Alkoxy Substituted Aromatic Diamines as Polymer Precursors and the Synthesis and Characterization of Aromatic Alkoxy Substituted Polyamides, Polyimides and Polyureas by : Michael Stephen Bonner
Download or read book The Synthesis of Alkoxy Substituted Aromatic Diamines as Polymer Precursors and the Synthesis and Characterization of Aromatic Alkoxy Substituted Polyamides, Polyimides and Polyureas written by Michael Stephen Bonner and published by . This book was released on 1977 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Thermal Studies of N, N'-bispropargyl Aromatic Diamines and N-propargyl Model Compounds by : David Morris Armistead
Download or read book Synthesis and Thermal Studies of N, N'-bispropargyl Aromatic Diamines and N-propargyl Model Compounds written by David Morris Armistead and published by . This book was released on 1979 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis of Alkoxy Substituted Aromatic Diamines as Polymer Precursors by : Michael Stephen Bonner
Download or read book The Synthesis of Alkoxy Substituted Aromatic Diamines as Polymer Precursors written by Michael Stephen Bonner and published by . This book was released on 1977 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Aromatic Amine Based Polyamides from Diisocyanates and Dicarboxylic Acids by : Victor Wang Shyang-Feng
Download or read book Synthesis of Aromatic Amine Based Polyamides from Diisocyanates and Dicarboxylic Acids written by Victor Wang Shyang-Feng and published by . This book was released on 1987 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polycondensation of O-dinitriles of Aromatic Polycarboxylic Acids and Diamines by : S. A. Siling
Download or read book Polycondensation of O-dinitriles of Aromatic Polycarboxylic Acids and Diamines written by S. A. Siling and published by . This book was released on 1992 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Mechanism of the Action of Salts During the Synthesis of Aromatic Polyamides in Amide Salt System by : A. A. Fedorov
Download or read book The Mechanism of the Action of Salts During the Synthesis of Aromatic Polyamides in Amide Salt System written by A. A. Fedorov and published by . This book was released on 1973 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors study the interaction of the salts of metals (LiCl, LiBr, LiNO3, LiSCN, MgCl2, AlCl3, SrCl2, ZnCl2, CdCl2, and also HCl) with benzanilide C6H5COHNC6H5, taken as a model of an aromatic polyamide, poly-p-phenyleneterephthalamide (PPTP) in a solution of DMAC. The results obtained are compared with data on the synthesis of this polymer in the presence of the same salts.
Book Synopsis Synthesis of Aromatic Amine Based Polyamides from Diisocyanates and Dicarboxylic Acids: Mechanisms of Polymerization and Application for Reactive Polymer Processing by : Victor Shyang Feng Wang
Download or read book Synthesis of Aromatic Amine Based Polyamides from Diisocyanates and Dicarboxylic Acids: Mechanisms of Polymerization and Application for Reactive Polymer Processing written by Victor Shyang Feng Wang and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Optical Properties of a New Class of Polyamides Containing Reactive Diacetylene Groups by : H. W. Beckham
Download or read book Synthesis and Optical Properties of a New Class of Polyamides Containing Reactive Diacetylene Groups written by H. W. Beckham and published by . This book was released on 1989 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: New polyamides containing reactive diacetylene groups in their repeat structures were synthesized from a diacetylene diacid chloride and two different diamines using interfacial polymerization techniques. Thermal analysis and carbon 13 NMR spectroscopy were used to estimate the extent of conversion of the diacetylene groups to polydiacetylene network chains upon exposure to electron beam radiation in the solid state. The diacetylene groups contained in a polyamide based on an aliphatic diamine were found to be more reactable than those incorporated in a polyamide based on an aromatic diamine. The cross-polymerized polyamide-diacetylenes were found to exhibit reversible thermochromic behavior during temperature cycling which occurs with complete retention of hydrogen bonds and without any hysteresis effects. The thermochromic reversibility of these materials was attributed to the strongly hydrogen bonded chain segments pendent to the newly formed polydiacetylene chains. (AW).
Book Synopsis Synthesis and Characterization of Thianthrene-Based Polyamides by : Randy A. Johnson
Download or read book Synthesis and Characterization of Thianthrene-Based Polyamides written by Randy A. Johnson and published by . This book was released on 1994 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thianthrene-2,7- and -2,8-dicarboxylic acids plus a synthetic intermediate, 4,4'-thiobis(3-chlorobenzoic acid), have been synthesized in good yields via nucleophilic aromatic substitution of Na2S on N, N-dimethyl-3,4- dichlorobenzamide. New aromatic polyamides having inherent viscosities of 1.29 to 2.39 dL/g were prepared by the direct polycondensation reaction of the dicarboxylic acids with 4,4'-oxydianiline and 1,4-phenylenediamine in N-methyl- 2-pyrrolidinone using triphenyl phosphite and pyridine. The fused-ring thianthrene-based polyamides were more soluble than analogous poly(thioether amide)s. Polymer films were cast from either DMF or DMAc/LiCl solutions and analyzed by FTIR and NMR. All prepared aramids displayed good thermal stability by DSC and TGA.
Book Synopsis The Synthesis of Fibre-forming Polyamides Containing A-amino Acid Residues by : John A. Tavender
Download or read book The Synthesis of Fibre-forming Polyamides Containing A-amino Acid Residues written by John A. Tavender and published by . This book was released on 1980 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simple difunctional peptides containing alanine and the diamine or di-acid monomers of nylon 6.6 were prepared by methods employed in peptide synthesis using 4-nitrophenyl esters. These compounds were intended for use as precursors in polymer formation. It was found that satisfactory polymers of a nylon type and containing alanine could not be prepared by conventional peptide synthesis techniques. The maximum molecular weight obtained was about 5,000. It was found possible to prepare polymers with a potential for fibre-formation, from mixtures of modified nylon salts containing the alanine derivatives prepared in the first part, by hot polycondensation techniques......
Book Synopsis Synthesis of Hard-Chain Aromatic Polyamides in the Dimethyl Acetamide-Lithium Chloride System by : V. M. Savinov
Download or read book Synthesis of Hard-Chain Aromatic Polyamides in the Dimethyl Acetamide-Lithium Chloride System written by V. M. Savinov and published by . This book was released on 1973 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The translation discusses the effect of lithium chloride concentration and monomeric concentration on the molecular weight of poly-n-phenylene-terephthalamide synthesized in the dimethyl acetamidelithium chloride system. It was shown that the sharp increase in the viscosity of the polymer in a domain of determined concentrations of lithium chloride was caused by the increase in the dissolving power of the solvent.
Book Synopsis The Synthesis and Characterization of Polyanhydrides by : Brandon Michael Vogel
Download or read book The Synthesis and Characterization of Polyanhydrides written by Brandon Michael Vogel and published by . This book was released on 2004 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is divided into four sections, all related to polyanhydride synthesis and characterization: first, the synthesis and characterization of polyethylene glycol containing aromatic polyanhydrides, second, the microwave polymerization of polyanhydrides, third the parallel synthesis and high-throughput dissolution screening, and finally preliminary investigations into the parallel investigation of blend phase behavior of a ternary polyanhydride blend. Oligomers of ethylene glycols were used to selectively modify the hydrophobicity of an aromatic polyanhydride. Aromatic diacids were synthesized from chlorinated triethylene and pentaethylene glycols and hydroxy benzoic acid. The diacids were acetylated with acetic anhydride to produce homopolymers of polyanhydrides for the stabilization of proteins and drugs. The glycol containing polyanhydrides were characterized by NMR, GPC, DSC and dissolution testing. The release characteristics of the new polyanhydrides were evaluated with a hydrophilic (Acid Orange) and hydrophobic dye (Rhodamine B Base) and the release mechanisms were investigated. Microwave radiation was used to explore the high throughput synthesis of polyanhydrides for materials library characterization. Aliphatic diacids were acetylated in situ for two minutes in a closed reaction vessel before removal of excess acetic anhydride and subsequent polymerization, all in the microwave. Reaction conditions such as acetic anhydride equivalents, duration of microwave exposure and comparision to conventional polycondensation were explored. Microwave polymerization times of 6 to 8 minutes yielded optimum number average molecular weights in contrast to conventional polycondensation, which took between 1.5 to 2 hours under high vacuum. A strategy was developed to synthesize copolymers of polyanhydrides using photolithographically generated microwells. The copolymers were characterized by NMR and spectroscopic FTIR as well as by parallel dissolution of a model dye from 25 copolymers using image analysis. Moreover, preliminary work was conducted on optical methods to investigate the phase behavior of a ternary blend of polyanhydrides in a parallel fashion. In conclusion, this thesis explored the synthesis and characterization of various polyanhydride-based homopolymers and copolymers by conventional as high-throughput techniques for controlled drug delivery applications.
Book Synopsis Method for Polycondensation of Salts from Dicarboxylic Acids and Diamines to Polyamides Without Pressure by : W. Settele
Download or read book Method for Polycondensation of Salts from Dicarboxylic Acids and Diamines to Polyamides Without Pressure written by W. Settele and published by . This book was released on 1963 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Performance Polymers and Engineering Plastics by : Vikas Mittal
Download or read book High Performance Polymers and Engineering Plastics written by Vikas Mittal and published by John Wiley & Sons. This book was released on 2011-09-09 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes advances in synthesis, processing, and technology of environmentally friendly polymers generated from renewable resources. With contents based on a wide range of functional monomers and contributions from eminent researchers, this volume demonstrates the design, synthesis, properties and applications of plant oil based polymers, presenting an elaborate review of acid mediated polymerization techniques for the generation of green polymers. Chemical engineers are provided with state-of-the-art information that acts to further progress research in this direction.
