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

Table 2

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


Properties	PU (%)	WG (%)	BC

Rubber wood
Density (after modification)	−0.37^Ns	0.53*	−0.53*
Density (increment)	0.49^Ns	0.83**	−0.65**
Void volume (after modification)	0.38^Ns	−0.53*	0.53*
Void volume changes	−0.32^Ns	−0.81**	0.59*
Acacia spp.
Density (after modification)	0.14^Ns	0.13^Ns	0.07^Ns
Density (increment)	0.52^Ns	0.55^Ns	0.34^Ns
Void volume (after modification)	−0.15^Ns	−0.13^Ns	−0.07^Ns
Void volume changes	−0.32^Ns	−0.43^Ns	−0.5^Ns
Oil palm
Density (after modification)	−0.71**	0.69**	−0.19^Ns
Density (increment)	−0.11^Ns	0.96**	−0.54*
Void volume (after modification)	0.71**	−0.69**	0.19^Ns
Void volume changes	0.39^Ns	−0.93**	0.38^Ns

PU: percentage uptake, WG: weight gain, BC: bulking coefficient. Ns: not significant, significant at the 0.05 level, andsignificant at the 0.01 level.