摘要： <正>对木竹复合胶合板在5种不同湿热条件下的弯曲性能进行了研究。结果表明：木竹复合胶合板在不同湿热条件下的弯曲性能从大到小依次为；冰冻（-5℃，4h），常态（20℃，65%），干热（150℃，4h），冷水（20℃，24h），热水（90℃，4h）。冰冻处理后木竹复合板的弯曲性能表现为正增强效应，其力学性能保持率为130%以上；干态、冷水、热水处理后均为负效应，表现为弯曲性能降低。干热与冷水处理下木竹复合胶合板的静曲强度保持率小于弹性模量的保持率；热水处理后的弹性模量保持率低于静曲强度保持率。木竹复合胶合板在冰冻、冷水、干热下表现为以脆性破坏为主，热水处理后木竹复合胶合板的性能表现出粘弹性特征。

Abstract: The morphologic characteristics of 20 specie from eight genera belonging to Magnoliaceae were observed. The results showed that the morphologic variations among genera were significantly, but it was difficult to distinguish species in the same genus because of less differences. The morphologic characteristics of the seeds from 20 species of magnolia were described. Some specimens were made and index was compiled for reference.

中图分类号: 

• S722