Influence of structure and chemical composition on thermal softening of palasan canes (Calamus merrillii)

Abstract

The influence of structure on the thermal softening of Palasan canes was evaluated using the creep compliance test. The canes revealed compliance curves similar to wood. Correlating the average compliance per temperature to ground parenchyma and fiber area percentage showed that the former promoted thermal softening while the latter inhibited it. This thermal response was highly affected by the ratio between the heat resistant cellulose and heat sensitive hemicellulose components of the cell wall. Ground parenchyma cells with high hemicellulose content favored thermal softening, while fibers with high cellulose content inhibited it. Therefore, the degree of thermal softening is dependent on the proportion of ground parenchyma present within the region. If the ground parenchyma percentage is high it is expected that the amount of softening will be large and vice versa.

Source or Periodical Title

IAWA Journal

ISSN

9281541

Page

363-374

Document Type

Article

Subject

Calamus merrillii Becc., Cellulose, Creep compliance, Fiber, Ground parenchyma, Hemicellulose, Thermal softening

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