Kharas, G. B. published the artcileNovel copolymers of styrene. 4. halophenoxy ring-substituted 2-cyano-3-phenyl-2-propenamides, Computed Properties of 61343-99-5, the main research area is halophenoxycyanophenylpropenamide styrene copolymer preparation thermal property.
Novel electrophilic trisubstituted ethylenes, halophenoxy ring substituted 2-cyano-3-phenyl-2-propenamides, RC6H4CH=C(CN)CONH2, where R is 4-(4-bromophenoxy), 2-(4-chlorophenoxy), 3-(4-chlorophenoxy), 4-(3-chlorophenoxy), 4-(4-chlorophenoxy), and 4-(4-fluorophenoxy) were prepared and copolymerized with styrene. The monomers were synthesized by potassium hydroxide catalyzed Knoevenagel condensation of ring-substituted benzaldehydes and cyanoacetamide, and characterized by CHN elemental anal., IR, 1H- and 13C-NMR. Novel copolymers of the ethylenes and styrene were prepared at equimolar monomer feed composition by solution in the presence of a radical initiator, AIBN at 70°C. The compositions of the copolymers were calculated from nitrogen anal., and the structures were analyzed by IR, 1H- and 13C-NMR, GPC, DSC, and TGA. Thus, the order of relative reactivity (1/r1) was 4-(4-ClC6H4O) (2.01) > 4-(4-FC6H4O) (0.89) > 4-(4-BrC6H4O) (0.73) > 3-(4-ClC6H4O) (0.65) > 2-(4-ClC6H4O) (0.24) > 4-(3-ClC6H4O) (0.22). High Tg of the copolymers in comparison with that of polystyrene indicated a substantial decrease in chain mobility of the copolymer due to the high dipolar character of the trisubstituted ethylene monomer unit. Decomposition of the copolymers in nitrogen occurred in two steps, first in the 200-500°C range with residue (10.4-15.0 wt%), which then decomposed in the 500-800°C range.
Journal of Macromolecular Science, Part A: Pure and Applied Chemistry published new progress about Glass transition temperature. 61343-99-5 belongs to class chlorides-buliding-blocks, name is 4-(4-Chlorophenoxy)benzaldehyde, and the molecular formula is C13H9ClO2, Computed Properties of 61343-99-5.
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