| Autor: |
Rivera-Gálvez FJ; Chemical Engineering Department, Universidad de Guadalajara, Blvd. Gral. Marcelino García Barragán, 1421, Guadalajara 44430, Jalisco, Mexico., González-Ortiz LJ; Chemistry Department, Universidad de Guadalajara, Blvd. Gral. Marcelino García Barragán, 1421, Guadalajara 44430, Jalisco, Mexico., López-Manchado MA; Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain., Hernández-Hernández ME; Chemical Engineering Department, Universidad de Guadalajara, Blvd. Gral. Marcelino García Barragán, 1421, Guadalajara 44430, Jalisco, Mexico., Jasso-Gastinel CF; Chemical Engineering Department, Universidad de Guadalajara, Blvd. Gral. Marcelino García Barragán, 1421, Guadalajara 44430, Jalisco, Mexico. |
| Abstrakt: |
In this work, a new methodology for the synthesis of three-component polymers (TCPs) was developed using a seeded, semi-continuous free-radical emulsion polymerization towards the optimization of the moduli-ultimate deformation performance and energy dissipation capacity for a styrene (S), n-butyl acrylate (BA), and 4-vinylbenzyl chloride (VBC) system. The three components were sequentially fed in pairs, varying feed composition along the conversion using S as the common monomer. To prepare a reference material, an industrial method was utilized with those monomers, using an equivalent global composition in a two-stage batch process (TS). Nanophase formation in the particles was observed by transmission electron microscopy (TEM), while the separation of the phases in the solid samples was observed by atomic force microscopy (AFM). The changes in glass transition temperature were determined by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The latter was primarily used to compare mechanodynamic properties as a function of temperature for the two synthesis methods used. Thus, the higher toughness of the forced composition three-component polymeric materials was evaluated by means of their energy dissipation capacity, toughness, and stress-strain measurements at several temperatures. |
