Journal of Composites

Research Article

Effect of Linear Chain Carboxylic Acid Anhydrides on Physical and Mechanical Properties of Rubber (Hevea brasiliensis), Acacia, (Acacia spp.), and Oil Palm (Tinnera spp.) Woods

The results of correlation test between the basic and physical properties and the mechanical properties of modified wood.


Properties	MoR (MPa)	MoE (MPa)	Compression (MPa)	Impact	Hardness

Rubber wood
Uptake (%)	−0.15^Ns	−0.14^Ns	−0.23^Ns	−0.26^Ns	0.12^Ns
Weight gain (%)	−0.52*	−0.35^Ns	−0.10^Ns	0.20^Ns	−0.03^Ns
Bulking coefficient (%)	−0.13^Ns	−0.14^Ns	−0.13^Ns	−0.24^Ns	−0.47^Ns
Density (after modification)	−0.14^Ns	0.05^Ns	0.10^Ns	0.44^Ns	0.01^Ns
Density increment	−0.18^Ns	−0.05^Ns	0.07^Ns	0.13^Ns	0.17^Ns
Void volume (after modification)	0.14^Ns	−0.05^Ns	−0.44^Ns	−0.10^Ns	−0.01^Ns
Void volume changes	0.17^Ns	−0.02^Ns	−0.22^Ns	−0.06^Ns	−0.13^Ns
Acacia spp.
Uptake (%)	−0.75**	−0.64*	−0.48^Ns	−0.41^Ns	−0.45^Ns
Weight gain (%)	−0.80**	−0.80**	−0.59*	−0.23^Ns	−0.43^Ns
Bulking coefficient (%)	−0.58*	−0.59*	−0.50^Ns	−0.08^Ns	0.06^Ns
Density (after modification)	−0.14^Ns	−0.19^Ns	−0.26^Ns	−0.27^Ns	−0.53*
Density increment	−0.48^Ns	−0.48^Ns	−0.42^Ns	−0.25^Ns	−0.55*
Void volume (after modification)	0.14^Ns	0.19^Ns	0.26^Ns	0.27^Ns	0.53*
Void volume changes	0.38^Ns	0.42^Ns	0.38^Ns	0.09^Ns	0.15^Ns
Oil palm
Uptake (%)	−0.65**	−0.64**	−0.37^Ns	−0.24^Ns	−0.54^Ns
Weight gain (%)	0.40^Ns	0.36^Ns	−0.01^Ns	0.27^Ns	0.07^Ns
Bulking coefficient (%)	−0.21^Ns	−0.25^Ns	−0.04^Ns	−0.14^Ns	0.01^Ns
Density (after modification)	0.84**	0.74**	0.41^Ns	0.53*	0.62*
Density increment	0.39^Ns	0.37^Ns	−0.00^Ns	0.30^Ns	0.06^Ns
Void volume (after modification)	−0.84**	−0.74*	−0.41^Ns	−0.53*	−0.62*
Void volume changes	−0.66**	−0.58*	−0.18^Ns	−0.46^Ns	−0.34^Ns

Ns: not significant,significant at the 0.05 level, andsignificant at the 0.01 level.