The Chemical Modification of Scots Pine with Succinic Anhydride or Octenyl Succinic Anhydride. I. Dimensional Stabilisation

摘要

The effect of chemical modification on the dimensional stability of Scots pine (Pinus sylvestris) sapwood using succinic anhydride (SA), or 2-octen-1-yl succinic anhydride (OSA) has been studied. Calculation of the theoretical volume increase due to modification, based on the density of the reagents was found to yield theoretical volume increases less than those measured, indicating that there are contributions to the volume increase from the space occupied by the reagent and a free-space or void volume. The ratio of void volume to reagent volume increased at low weight percent gains (wpg), however above 20 /100 wpg OSA treated wood exhibited a linear relationship between void and reagent volume, whilst with SA treated wood the ratio decreased continuously as wpg increased.