MISCIBILITY AND MECHANICAL PROPERTIES OF POLY(ETHYLENE-co- ACRILIC ACID) AND POLY(2-ETHYL-2-OXAZOLINE) BLENDS

  • S. Nuño-Donlucas Depto. de Ingeniería Química. Universidad de Guadalajara. Centro Universitario de Ciencias Exactas e Ingeniería
  • L. C. Cesteros Grupo de Nuevos Materiales. Depto. de Química Física. Universidad del País Vasco.
  • I. Katime Grupo de Nuevos Materiales. Depto. de Química Física. Universidad del País Vasco.
  • J. E. Puig Depto. de Ingeniería Química. Universidad de Guadalajara. Centro Universitario de Ciencias Exactas e Ingeniería
Keywords: hydrogen bonding, mechanical properties, miscibility, mixtures, modulated differential scanning calorimetry

Abstract

The miscibility behavior of blends of poly(2-ethyl 2-oxazoline) (PEOx) and poly(ethylene-co-acrylic acid) (PEAA) was studied as a function of the acrylic acid content with differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). Miscibility, ascertained by the existence of a single glass transition in the mixtures, is achieved only between the PEOx and a copolymer with high acrylic acid content (20 wt.%). For blends where the PEAA have acrylic acid content is minor to 10 wt.% overall immiscibility was detected. FTIR spectroscopy demonstrates that miscibility is enhanced by hydrogen bonding interactions between the amide groups of the PEOx and the carboxylic groups of the acrylic acid units in the copolymer. Tensile stress-strain tests reveal that the 20 and the 40 wt% PEOx blends exhibit synergism in mechanical properties, i.e., better ultimate properties. SEM micrographs of the fracture surface show brittle fracture in blends with high content in PEOx, and ductile fracture in the blends with low PEOx content.

References

Aklonis, J. J. y McKnigth, W. J. (1983). Introduction to Polymer Viscoelasticity. Wiley, Nueva York.

Baitoul, M., Saint-Guirons H., Xans, P. y Monge, P. (1983). Study of 2-phase polymer blends by differential thermal analysis. European Polymer Journal 19, 651-655.

Boyd, R. H. (1985a). Relaxation processes in crystalline polymer-experimental behavior- a review. Polymer 26, 323-347.

Boyd, R. H. (1985b). Relaxation processes in crystalline polymer-molecular interpretation- a review Polymer 26, 1123- 1133.

Coleman, M. M., Graf, J. y Painter, P. C. (1991). Specific Interactions and the Miscibility of Polymer Blends: Practical Guides for Predicting & Designing Miscible Polymer Mixtures. Technomic Pub. Co., Lancaster PA.

Fellahi, S., Favis B. D. y Fisa B. (1996). Morphological stability in injection-moulded high-density polyethylene/polyamide-6 blends. Polymer 37, 2615-2626.

Ferry, J. D. (1980). Viscoelastic Properties of Polymers. Wiley, Nueva York.

Gedde, U. W. (1995). Polymer Physics. 1a edición. Chapman & Hall, Londres, Gran Bretaña.

Hentschel, D., Sillescu, H. y Spiess, H. W. (1981). Chain motion the amorphous regions of polyethylene as revealed by deuteron magnetic-resonance. Macromolecules 14, 1605-1607.

Kwei, T. K. (1984). The effect of hydrogen bonding on the glass transition temperatures of polymer mixtures. Journal Polymer Science, Polymer Letter Edition 22, 307-313.

Lin, P., Clash, C., Pearce, E. M., Kwei, T. K. y Aponte, M. A. (1988). Solubility and miscibility of poly(ethyt oxazoline) Journal Polymer Science Part B: Polymer Physics 26, 603-619.

McCrum, N. G., Read, B. E. y Williams, G. (1967). Anelastic and Dielectric Effects in Polymer Solids. Wiley, Nueva York.

Nielsen, L. E. (1974). Mechanical Properties of Polymers and Composites. Marcel Dekker, Nueva York.

Nuño-Donlucas, S. M. (1999). Miscibilidad y propiedades Térmicas y Dinamo-Mecánicas de Mezclas de Polímeros. Tesis Doctoral, Departamento de Química-Física. Universidad del País Vasco, España.

Parada, L. G., Cesteros, L. C., Meaurio, E. y Katime, I. (1997). Miscibility and specific interactions in blends of poly(vinyl acetato-co-vinyl alcohol) with poly(ethyloxazoline) Macromolecular Chemistry Physics 198, 2505-2517.

Paul, D. R. y Barlow, J. W. (1984). A binary interaction model for miscibility of copolymers in blends. Polymer 25, 487- 494.

Popli, R., Glotin, M. y Mandelkern, L. (1984). Dynamical mechanical studies of alpha- relaxations and beta-relaxations of polyethylenes. Journal Polymer Science; Polymer Physics Edition 22, 407-448.

Rosenke, K., Sillescu, H. y Spiess, H. W. (1980). Chain motion in morphous regions of polyethylene-interpretation of deuteron NMR line shapes. Polymer 21, 757-763.

Spiess, H. W. (1983). Molecular dynamics of solid polymer as revealed by deuteron NMR. Colloid Polymer Science 261, 193-209.

Ward, I. M. (1985). Mechanical Properties of Solid Polymers. 2a edición. Wiley, Nueva York.

Willians, J. L. y Peterlin, A. (1971).Transportation properties of methylene chloride in drawn polyethylene as a function of draw ratio . Journal of Polymer Science, 9, 1483-1494.
Published
2020-11-23
How to Cite
Nuño-Donlucas, S., C. Cesteros, L., Katime, I., & E. Puig, J. (2020). MISCIBILITY AND MECHANICAL PROPERTIES OF POLY(ETHYLENE-co- ACRILIC ACID) AND POLY(2-ETHYL-2-OXAZOLINE) BLENDS. Revista Mexicana De Ingeniería Química, 2(1), 43-62. Retrieved from http://www.rmiq.org/ojs311/index.php/rmiq/article/view/2226