Synthesis of High Aspect Ratio Bisphenols and Polycarbonates Incorporating Bisaryl Units
| Autor: | Guy Longbrake, Tsvetanka Filipova, John T. Bendler, David A. Boyles, Josiah T. Reams |
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| Rok vydání: | 2005 |
| Předmět: |
Bisphenol A
Materials science Polymers and Plastics Organic Chemistry Interfacial polymerization Amorphous solid Inorganic Chemistry chemistry.chemical_compound Monomer chemistry Chemical engineering Polymerization visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Polycarbonate Glass transition Melt flow index |
| Zdroj: | Macromolecules. 38:3622-3629 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma048616m |
| Popis: | Theoretical arguments linking monomer geometries to polymer fracture strengths and melt flow properties provide the rationale for design of a series of isomeric, high-aspect ratio bisphenols and new polycarbonates. An efficient synthesis of these monomers in addition to an optimal triphosgenation-based method for the synthesis of high molecular weight polycarbonates is presented. Preparation and polymerization of o-, meta-, and p-tetraaryl bisphenol A are reported, in addition to glass transition temperatures of the new polycarbonates. In accordance with expectations, the p- and m- isomers form ductile, amorphous high-heat films, while the o-isomer produces a relatively low-Tg brittle glass. |
| Databáze: | OpenAIRE |
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