木塑复合材料吸水膨胀率的研究

Study on the swell rate of wood-plastic composites by soaking in water

采用室温浸泡、60℃水浴、沸水煮沸3种试验处理手段对木塑复合材料尺寸的变化情况进行研究,就各个方向的变化进行了量化比较,对产生此现象的原因进行了宏观与微观的分析.结果表明,板材不同方向上的吸水膨胀尺寸变化规律为:宽度方向>厚度方向>长度方向.在处理时间大致相同的情况下,不同条件下不同方向吸水膨胀尺寸比值的平均值约为:宽度/长度=2.31,厚度/长度=1.87,宽度/厚度=1.34.

The dimension changes of wood-plastic composites were studied in this paper by soaking in three types of water -room temperature water, 60?℃ water and boiling water. And the quantum changes of different directions were compared. The phenomenon was analyzed by observing macro characters and microstructures. The results shows the rule of the soaking swell rate at different directions was: width>thickness>length. During about the equivalency time, the mean ratio value of different directions at the three various disposal conditions was: width/ length=2.31, thickness/ length=1.87, width/ thickness=1.34.