Synthesis and characterization of nanocomposites from amphipathy polyester grafted modified sericite and methylsilicone resin

Abstract

The synthetic process of amphipathy polyester grafted modified sericite and methylsilicone resin composites is studied. The analytical results showed that the initial decomposition temperature and the maximum release energy corresponding temperature are enhanced 120 °C and 51 °C. First, modified methylsilicone resin molecular structure is designed. Molecular chair of methylsilicone resin is grafted macromolecular polymer, which is synthesized by toluene-2, 4-diisocyanate modified sericite grafted amphipathy polyester. A modified sericite /methylsilicone resin composites are synthesized through the reaction of functionalized sericite with hydroxyl-terminated methylsilicone resin. X-ray diffraction analysis result showed that the methylsilicone resin has reacted with the modified sericite. Infrared spectra, x-ray photoelectron spectroscopy and nuclear magnetic resonance analysis show that the weak Si-OH band decreases and the strong Si-O-Si band increases. The mechanism of thermal stability is analyzed from the isolated oxygen atom and activated small molecule; interrupted activated Si-OH, steric hindrance. The result of study evidently shows a significant role in enhancing the decomposition temperature of the methylsilicone resin.