Synthesis and Characterization of Poly(arylene Ethers) and Functionalized Oligomers PDF Download
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Author: Michael J. Jurek
Publisher:
ISBN:
Category : Ether
Languages : en
Pages : 380
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Book Description
Author: Michael J. Jurek
Publisher:
ISBN:
Category : Ether
Languages : en
Pages : 380
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Book Description
Author: David Lewis Eldridge
Publisher:
ISBN:
Category : Ether
Languages : en
Pages : 220
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Book Description
Author: Constantin V. Uglea
Publisher: CRC Press
ISBN: 9780849349546
Category : Technology & Engineering
Languages : en
Pages : 388
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Book Description
This book provides an excellent introduction to the fundamentals of oligomer chemistry. Each section describes the synthesis, separation, physico-chemical characterization, and present and future applications of individual classes of oligomers organized according to the chemical structure of the main chain. In addition, this book features up-to-date references from both journals and patents and an extensive appendix covering synthesis and characterization methods of oligomeric derivatives. Synthesis and Characterization of Oligomers is a broad, state-of-the-art survey and will be useful not only for students and professionals working with oligomers, but also chemists who are new to the field.
Author: Shilain Denny Wu
Publisher:
ISBN:
Category : Polymerization
Languages : en
Pages : 452
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Book Description
Author: Sheeba Ahmed
Publisher:
ISBN:
Category : Aromatic compounds
Languages : en
Pages : 352
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Book Description
Author: American Chemical Society. Division of Polymer Chemistry
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 1310
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Book Description
Author: J. E. McGrath
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
Carboxyl functional poly(arylene ether) oligomers of controlled number average molecular weight were synthesized via nucleophilic aromatic substitution step polymerization using p-hydroxy benzoic acid as the molecular weight and end group controlling reagents. The subsequent functionalized polyarylene ethers were copolymerized with acetoxy benzoic acid or acetoxy-phenoxy benzoic acid via melt acidolysis procedures. Successful copolymers were generated using chlorobenzene as a solvent for the first stage of the reaction followed by melt reaction at temperatures as high as 325 deg C. Resulting copolymer composition and segment size were investigated. it was possible to prepare improved solvent resistant copolymers through incorporation of the liquid crystal polyester (LCP) segment. Extraction tests using boiling chloroform showed that a high percentage of segmented copolymer were generated. Swelling characteristics were also noted and were observed to decrease as a function of the LCP concentration utilized. Multiple transitions were observed in differential scanning calorimetry consistent with Tg's, Tm's and possibly with liquid crystal transitions. optical microscopy showed an ordered microstructure developed which is consistent with the presence of liquid crystalline phases. The materials were successfully compression molded to afford tough coherent films at all compositions, implying the likelihood of improved compressive strength relative to the LCP homo- or copolyesters.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 886
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Book Description
Author: Duane B. Priddy
Publisher:
ISBN:
Category : Polymers
Languages : en
Pages : 564
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Book Description
Author: Zahida Humayun
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 81
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Book Description
The synthesis of poly(arylene ether)s, with a pendent aryl iodide, was achieved via nucleophilic aromatic substitution (NAS) polycondensation of DI-DFDPS monomer. The platform diiodo-difluorodiphenyl sulfone monomer, DFDPS-DI (3), was prepared in one-step, via EAS chemistry. Structural characterization was provided by NMR spectroscopy, GC/MS, and elemental analysis. As "pre" approach didn't work here, so "post" approach was used to synthesize N-heterocycle functionalized copolymers. The DI-copolymers were subjected to copper-catalyzed C-N coupling reaction with carbazole, phenoxazine, and indole and the syntheses of chromophore based copolymer were successfully carried out. A series of PAEs containing carbazole, phenoxazine, and indole substituents were synthesized and characterized. The copolymers were characterized by a combination of NMR spectroscopy, UV/Vis spectroscopy. DI-copolymers displayed had sufficient molecular weight (Mn) and thermal stability with 5% weight loss temperature (Tg) above 388 0C and glass transition temperature, Tg, value above 193 0C. Optical analyses provided that all modified copolymer materials emitted in the light blue region.
