Preparation of exfoliated clay/polymer nanocomposites via organosilane grafting and in situ ATRP of glycidyl methacrylate

摘要: Clay/polymer nanocomposites, of the type montmorillonite/polyglycidyl methacrylate) (MMT/PGMA), were synthesized via atom transfer radical polymerization (ATRP). MMT was amino-silanized and then reacted with 2-bromoisobutyryl bromide (BIB) to provide -NH-C(=O)-C(CH 3 ) 2 Br groups attached clay. The latter (MMT-SiBr) served as macroinitiator for in situ ATRP GMA. resulting MMT/PGMA nanocomposites found be highly exfoliated, judged by X-ray diffraction (XRD) measurements. Thermogravimetric analysis (TGA) XPS analyses suggest that have PGMA-rich bulk surface. Indeed, mass loading PGMA reached 65 wt. % while spectra, particularly high-resolution C1 s region, resemble those pure PGMA. These clay/PGMA are suitable nanofillers epoxy adhesives, since chains both compatible resins reactive towards crosslinkers pendant glycidyl from grafts.