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  Sci. Lett. J. 2013, 2: 40  
  Research Article
  Full Text
Bismaleimide/rice husk silica blends – Kinetics of curing by DSC  
  D. Rajamania, R. Surenderb, S. Alamc, S. Muthusubramaniand, C. T. Vijayakumarb  
     
a Department of Chemistry, The Standard Fireworks Rajaratnam College for Women, Sivakasi 626123, India
b Department of Polymer Technology, Kamaraj College of Engineering and Technology, S.P.G.C. Nagar, K.Vellakulam Post 625701, India
c Defence Materials and Stores Research and Development Establishment, G. T. Road, Kanpur 208 013, India
d Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625021, India

   
  Abstract  
  In the present work, silica derived from rice husk ash is used as particulate filler for bismaleimide (BMI). For better compatibility between the 4,4’-bismaleimidodiphenylmethane (BMIM) and silica particles, organic and chemical modifications of the silica particles are done using stearic acid and N-[4-(chlorocarbonyl)phenyl] maleimide respectively. The dispersion of the particulate filler in BMIM is done by ultrasonication. The curing characteristics of these materials are investigated using differential scanning calorimeter. The curing kinetics is investigated using Kissinger–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO) and Friedman (FRD) methods. The silica, organically and chemically modified silica particles have considerable influence on the curing behavior of BMIM. The activation energies calculated for these systems are higher than those for pure BMIM indicating the existence of interaction between these particles and BMIM.  
     
  Keywords  
  Bismaleimide; Rice husk; Silica; DSC; Curing kinetics  
     
   
     
 
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