Cyanate Ester/Functionalized Silica Nanocomposite: Synthesis, Characterization and Properties. Issue 11 (28th October 2015)

• Record Type: Journal Article
• Authors: Li, Jiapeng; He, Qihui; Xu, Renfu; Hu, Baixing
• Is Part Of: Chinese journal of chemistry. Volume 33:Issue 11(2015:Nov.)
• Page Start: 1259
• Page End: 1268
• Publication Date: 2015-10-28
• Subjects: nanocomposites -- functionalized SiO2 -- mechanical properties -- thermal stability; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201500498
• Languages: English
• ISSNs: 1001-604X

Abstract

Abstract: In this paper silica nanoparticles with covalently grafted polymer chains were incorporated into bisphenol A dicyanate ester (BADCy) to prepare composites which resulted in improvements in the mechanical and thermal properties. Fourier‐transform infrared (FT‐IR) spectroscopy transmission electron microscopy (TEM) and thermogravimetric analysis (TGA) were employed to examine the surface functionalization of silica nanoparticles. The effects of functionalized SiO2 (F‐SiO2 ) on the curing reactivity mechanical and thermal properties of BADCy resin were investigated systematically. The curing reaction of the system was facilitated with the addition of F‐SiO2 . Meanwhile compared with the neat resin the incorporation of appropriate content of modified F‐SiO2 can enhance the mechanical properties including impact flexural strengths and fracture toughness K IC of BADCy resin. In addition the thermal stability of BADCy/F‐SiO2 nanocomposites is also superior to that of pure BADCy resin. Abstract : A novel functionalized silica nanocomposite (F‐SiO2 ), with 5‐isocyanato‐1‐isocyanatomethyl‐1, 3, 3‐trimethylcyclohexane (IPDI) acting as a linking agent to connect hydroxyl‐terminated polybutadiene (HTPB) and silica, was prepared to modify the bisphenol A dicyanate ester (BADCy). The incorporation of appropriate content of modified F‐SiO2 can enhance the mechanical properties of BADCy resin. In addition, the thermal stability of BADCy/F‐SiO2 nanocomposties is also superior to that of pure BADCy resin.