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- W2158658841 abstract "Electrophilic trisubstituted ethylene monomers, methoxy ring‐substituted methyl 2‐cyano‐3‐phenyl‐2‐propenoates, RC6H3CH˭C(CN)CO2CH3, (where R is 2,3‐(CH3O)2, 2,4‐(CH3O)2, 2,5‐(CH3O)2, 2,6‐(CH3O)2, 3,4‐(CH3O)2, 3,5‐(CH3O)2, 2,4,5‐(CH3O)3, and 2,4,6‐(CH3O)3), were synthesized by the piperidine catalyzed Knoevenagel condensation of ring‐substituted benzaldehydes and methyl cyanoacetate, and characterized by CHN elemental analysis, IR, 1H‐ and 13C‐NMR. Copolymerization of the propenoates and vinyl acetate in solution with radical initiation (AIBN) at 70°C yielded equimolar alternating copolymers. The composition of the copolymers was calculated from nitrogen analysis, and the structures were analyzed by IR, 1H‐and 13C‐NMR, GPC, DSC, and TGA. High Tg of the copolymers in comparison with that of polyvinyl acetate indicates a substantial decrease in chain mobility of the copolymer due to the high dipolar character of the trisubstituted ethylene monomer unit. The gravimetric analysis indicated that the copolymers decompose in the 240–400°C range." @default.
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- W2158658841 date "2005-06-01" @default.
- W2158658841 modified "2023-09-26" @default.
- W2158658841 title "Novel Copolymers of Methoxy Ring‐Substituted Methyl 2‐cyano‐3‐phenyl‐2‐propenoates" @default.
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- W2158658841 doi "https://doi.org/10.1081/ma-200058623" @default.
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