Open AccessMECHANICAL CHARACTERIZATION OF POLYMERIC FILMS BASED ON COPOLYMERS OF STYRENE AND BUTYL ACRYLATE OBTAINED BY HETEROGENEOUS POLYMERIZATION IN SEMICONTINUOUS
Author(s) -
Mercedes Puca Pacheco,
María Guadalupe NeiraVelázquez,
G. CanchéEscamilla
Publication year - 2021
Publication title -
revista de la sociedad química del perú/revista de la sociedad química del perú
Language(s) - English
Resource type - Journals
eISSN - 2309-8740
pISSN - 1810-634X
DOI - 10.37761/rsqp.v87i1.318
Subject(s) - copolymer , materials science , butyl acrylate , monomer , acrylate , polymer chemistry , styrene , polymerization , chemical engineering , methyl methacrylate , particle size , methacrylate , dynamic mechanical analysis , gravimetric analysis , polymer , composite material , chemistry , organic chemistry , engineering
The aim of this work was to synthesize copolymers of styrene (St) and butyl acrylate (AB) cross-linked with allyl methacrylate by semicontinuous heterogeneous polymerization in order to study the mechanical properties of the polymeric films prepared from the latexes obtained. Copolymer latexes were stable and nanoparticles with spherical morphology were observed by Transmission Electron Microscopy (TEM). The latexes had final conversions between 92,5 and 97,0%, which were determined by the gravimetric method, and a solids content close to 20%. The nanoparticles of latex had an average diameter of 59,1; 55,1 and 49,0 nm for monomer dosing rates of 0,75; 0,45 and 0,15 g/min, respectively. By means of mechanical characterization of the polymeric films and according to the statistical analysis, it was found that when the monomer dosage rate decreased in the synthesis, the mean particle diameter and molecular weight also decreased, and with it a decrease in its Young's Modulus (MPa).