Nanocomposites based on vermiculite clay and ternary blend of poly(L‐lactic acid), poly(methyl methacrylate), and poly(ethylene oxide)

Abstract

Vermiculite (VMT) as clay was introduced into a ternary polymer blend composed of poly(L‐lactic acid) (PLLA), poly(methyl methacrylate) (PMMA), and poly(ethylene oxide) (PEO), whose ternary miscibility was proven within low certain contents of PMMA and PEO in PLLA. VMT was incorporated to the ternary polymer blend as matrix after proper organic modification on the clay. The organically modified vermiculite (OVMT) shows good interaction and acceptable dispersion in the ternary polymer matrix without altering the crystal structures of PLLA/PEO constituents. The effect of OVMT addition was then analyzed in isothermal crystallization by using the Avrami kinetic analysis, and the addition of OVMT is evident in altering nucleation process of the polymer blend as well as the crystal perfection. The activation energy is much lowered by the addition of OVMT, as evident from the analysis; the overall crystallization kinetic rates are increased with the incorporation of OVMT. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers

Crystallization kinetics and degradation of nanocomposites based on ternary blend of poly(L‐lactic acid), poly(methyl methacrylate), and poly(ethylene oxide) with two different organoclays

“…Regarding the wide angle x‐ray diffraction (WAXD) and TEM observation for the dispersion of two different organoclays in PLLA/PMMA/PEO nanocomposites, the dispersed organoclays particles can be considered to have a good dispersion in the polymers matrix, both of OVMT and Clo10A. The TEM result of CLo10A clay dispersion in the ternary blend matrix is quite similar to OVMT clay in the matrix, as demonstrated in concurrent work published earlier 21…”

“…In continuing a previous study dealing with VMTclay based nanocomposites, 21 this study further extended to another common clay (Cloisite) to compare the properties, kinetics, and bio-and thermal degradability of two different clays based on the same ternary blend matrix. Two different organoclays were incorporated to ternary polymer blend as matrix composed of PLLA, PMMA, and PEO.…”

“…The TEM result of CLo10A clay dispersion in the ternary blend matrix is quite similar to OVMT clay in the matrix, as demonstrated in concurrent work published earlier. 21…”

The influence of the preparation conditions and filler content on thermal properties of poly-l -lactide and hydroxyapatite/poly-l -lactide nanocomposite

“…Despite the fact that there are a few reports dealing with the influence of filler content or preparation conditions on the properties of PLLA and its nanocomposites, data on the joint effects of these factors on composites based on PLLA and calcium phosphate ceramics intended for use in orthopedic applications are quite limited . Therefore, the intention of this work was to give a wide and complex depiction regarding the combined influence of the initial preparation conditions and filler content on the structure, crystallinity and thermal properties of PLLA and HAp/PLLA nanocomposites.…”

Conductance investigation of p-MIECs fabricated by poly(3,4-ethylenedioxy thiophene), polyacrylic acid, polyethylene oxide, and lithium-ion salt

“…As we know, PEO is highly crystalline and water soluble . The ionic conductivity of PEO containing alkaline salts was reported, and PEO has been widespread applied in polymer electrolyte and solid state ionic battery.…”