Characterizing Liquid Resin Penetration In Wood Using A Mercury Intrusion Porosimeter

Weiqiu Wang, Ning Yan


A method has been developed to characterize resin penetration by measuring the change in the pore size distribution and porosity of samples with and without resin using a mercury intrusion porosimeter. The method was used to study the liquid phenol-formaldehyde resin penetration in birch and aspen veneer samples as a function of different curing conditions. For both the birch and aspen samples, the liquid PF resin was found to penetrate mostly into the bigger pores (diameter ≥ 40 μm for birch/LPF and diameter ≥ 10 μm for aspen/LPF) for specimens cured in the oven. Resin penetrated into the smaller pores under the influence of pressure when cured in a hot-press, especially when the specimens were cured at face location in the hot-press. Under all curing conditions, some resin only partially filled some pores and resulted in an increase in pores of smaller sizes.


Mercury intrusion porosimeter (MIP);pore structure;pore volume change;resin penetration;curing condition

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