Tuning the Morphology in the Nanoscale of NH 4 CN Polymers Synthesized by Microwave Radiation: A Comparative Study.

Autor: Pérez-Fernández, Cristina, Valles, Pilar, González-Toril, Elena, Mateo-Martí, Eva, de la Fuente, José Luis, Ruiz-Bermejo, Marta
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Zdroj: Polymers (20734360); Jan2022, Vol. 14 Issue 1, p57, 1p
Abstrakt: A systematic study is presented to explore the NH4CN polymerization induced by microwave (MW) radiation, keeping in mind the recent growing interest in these polymers in material science. Thus, a first approach through two series, varying the reaction times and the temperatures between 130 and 205 °C, was conducted. As a relevant outcome, using particular reaction conditions, polymer conversions similar to those obtained by means of conventional thermal methods were achieved, with the advantage of a very significant reduction of the reaction times. The structural properties of the end products were evaluated using compositional data, spectroscopic measurements, simultaneous thermal analysis (STA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). As a result, based on the principal component analysis (PCA) from the main experimental results collected, practically only the crystallographic features and the morphologies in the nanoscale were affected by the MW-driven polymerization conditions with respect to those obtained by classical syntheses. Therefore, MW radiation allows us to tune the morphology, size and shape of the particles from the bidimensional C=N networks which are characteristic of the NH4CN polymers by an easy, fast, low-cost and green-solvent production. These new insights make these macromolecular systems attractive for exploration in current soft-matter science. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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