The effect of acetylation on interfacial shear strength between plant fibres and various matrices

Interfacial sheer strength between acetylated fibres and various matrices w as studied. The chemical modification of oil palm empty fruit bunch (EFB) a nd coconut fibre (coir) using non-catalysed acetic anhydride were investiga ted. Proof of acetylation of EFB and coir was indicated by the increase in weight percent gain, and was confirmed by Fourier transform infrared spectr a. Pull-out tests were employed to study the compatibility of acetylated fi bres with different commercial matrices such as "Epiglass" (epoxy), "West s ystem': (epoxy), "Crystic" (unsaturated polyester), "Metset" (unsaturated p olyester) and polystyrene. An increase in the interfacial shear strength be tween acetylated fibres and hydrophobic resins was noted. Modified fibres w ere shown to have a smoother surface compared with unmodified, which was be lieved to be a factor in improving the fibre-matrix adhesion. (C) 2001 Else vier Science Ltd. All rights reserved.