Novel Copolymers of Styrene. 18. Halogen Ring-Trisubstituted Methyl 2-Cyano-3-Phenyl-2-Propenoates
| العنوان: | Novel Copolymers of Styrene. 18. Halogen Ring-Trisubstituted Methyl 2-Cyano-3-Phenyl-2-Propenoates |
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| المؤلفون: | Hui Feng, Ahlam Shahbain, Sara M. Rocus, Gregory B. Kharas, Teresa Spann, Hemal S. Bhavsar, William S. Schjerven |
| المصدر: | Journal of Macromolecular Science, Part A. 52:90-94 |
| بيانات النشر: | Informa UK Limited, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Ethylene, Polymers and Plastics, Chemistry, General Chemistry, Styrene, chemistry.chemical_compound, Monomer, Polymer chemistry, Materials Chemistry, Ceramics and Composites, Copolymer, Reactivity (chemistry), Knoevenagel condensation, Piperidine, Polystyrene |
| الوصف: | Novel trisubstituted ethylene monomers, halogen ring-trisubstituted methyl 2-cyano-3-phenyl-2-propenoates, RPhCH=C(CN)CO2CH3, where R is 4-bromo-2,6-difluoro, 3-chloro-2,6-difluoro, 4-chloro-2,6-difluoro, 2,3,5-trichloro, 2,3,6-trichloro, and 2,4,5-trifluoro, were prepared and copolymerized with styrene. The monomers were synthesized by the piperidine catalyzed Knoevenagel condensation of halogen ring-trisubstituted benzaldehydes and methyl cyanoacetate, and characterized by CHN analysis, IR, 1H and 13C-NMR. All the ethylenes were copolymerized with styrene (M1) in solution with radical initiation (ABCN) at 70°C. The compositions of the copolymers were calculated from nitrogen analysis and the structures were analyzed by IR, 1H and 13C-NMR. The order of relative reactivity (1/r1) for the monomers is 3-Cl-2,6-F2 (4.2) > 4-Cl-2,6-F2 (3.9) > 4-Br-2,6-F2 (1.8) > 2,3,5-Cl3 (1.1) > 2,4,5-F3 (0.9) > 2,3,6-Cl3 (0.5). Relatively high Tg of the copolymers in comparison with that of polystyrene indicates a decrease ... |
| تدمد: | 1520-5738 1060-1325 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::b8e9da997c77ba8bd6430e60c190b713 https://doi.org/10.1080/10601325.2015.980712 |
| رقم الأكسشن: | edsair.doi...........b8e9da997c77ba8bd6430e60c190b713 |
| قاعدة البيانات: | OpenAIRE |
PDF full text from Publisher | تدمد: | 15205738 10601325 |
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