COPOLYMERIZATIONS OF LONG SIDE CHAIN DI N-ALKYL ITACONATES AND METHYL N-ALKYL ITACONATES WITH STYRENE: DETERMINATION OF MONOMERS REACTIVITY RATIOS BY NMR

Authors

  • Elizabeth Rangel-Rangel Grupo de Polímeros ULA Departamento de Química Facultad de Ciencias Universidad de los Andes Mérida 5101A Venezuela
  • Carlos M. Torres Grupo de Polímeros ULA Departamento de Química Facultad de Ciencias Universidad de los Andes Mérida 5101A Venezuela
  • Sonia Koteich-Khatib Laboratorio de Resonancia Magnética Nuclear Departamento de Química Facultad de Ciencias Universidad de los Andes Mérida 5101A Venezuela
  • Luís Rincón Grupo de Procesos Dinámicos en Química Departamento de Química Facultad de Ciencias Universidad de los Andes Mérida 5101A Venezuela
  • Francisco López-Carrasquero Grupo de Polímeros Departamento de Química Facultad de Ciencias Universidad de los Andes Mérida 5101A Venezuela

Abstract

Low yields copolymerization of styrene (S) with di-n-alkylitaconates (DI-n) and methyl n-alkylitaconates (MeI-n) with alkyl side chain of 12, 14, 16, 18 and 22 carbon atoms were carried out in bulk via radical at 60ºC with AIBN as initiator. The copolymers chemical structure was characterized by FTIR and 1H and 13C-NMR, and the composition was determined by 1H-NMR. The NMR studies indicate that the copolymers are random, but with some tendency to alternation. The monomers reactivity ratios between the styrene and itaconates in the copolymerization (ri) were calculated by the Fineman-Ross (FR), Kelen Tüdös (KT) methods and a modification of the last one. The obtained values of r1(DI) and r2(S) in the copolymerization among DI-n with n = 12, 14 and 16 with S were in the range of 0.22 to 0.28 for DI-n and 0.19 to 0.39 for S. Whereas for DI-n with n = 18 and 22 the values are in the order of 0.42-0.50 and 0.37-0.47 respectively. For the copolymer series derivatives of MeI-n the values were between 0.01-0.41 for the itaconate and 0.44-0.97 for S.

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Author Biographies

Sonia Koteich-Khatib, Laboratorio de Resonancia Magnética Nuclear Departamento de Química Facultad de Ciencias Universidad de los Andes Mérida 5101A Venezuela

Profesora Departamento de Quí­mica ULA

Luís Rincón, Grupo de Procesos Dinámicos en Química Departamento de Química Facultad de Ciencias Universidad de los Andes Mérida 5101A Venezuela

Profesor Departamento de Química ULA

Francisco López-Carrasquero, Grupo de Polímeros Departamento de Química Facultad de Ciencias Universidad de los Andes Mérida 5101A Venezuela

Profesor Titular Coordinador del Grupo de Polí­meros ULA Departamento de Quí­mica ULA

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Published

2011-06-21

How to Cite

Rangel-Rangel, E., Torres, C. M., Koteich-Khatib, S., Rincón, L., & López-Carrasquero, F. (2011). COPOLYMERIZATIONS OF LONG SIDE CHAIN DI N-ALKYL ITACONATES AND METHYL N-ALKYL ITACONATES WITH STYRENE: DETERMINATION OF MONOMERS REACTIVITY RATIOS BY NMR. LatinAmerican Journal of Metallurgy and Materials, 79–88. Retrieved from https://www.rlmm.org/ojs/index.php/rlmm/article/view/142

Issue

2012, 32(1)

Section

Regular Articles

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