A Shimadzu model 8400 FTIR spectrophotometer was used to obtain the FTIR spectra of treated and untreated composites. For each sample, 45 scans were recorded from 4000 to 500 〖"cm" 〗^(−1) at a resolution of 5 〖"cm" 〗^(−1) in the absorption mode. Samples of the material surface, finely divided, were ground and dispersed in a matrix of KBr and further ground to a fine mixture in a mortar, before pressing to form KBr pellet for analysis.