新型集装箱底板老化性能试验

Study on aging properties of new-type container flooring

对3种结构的新型集装箱底板进行老化试验,测试了其老化前后的24 h吸水厚度膨胀率（TS）、24 h吸水率（WA）、静曲强度（MOR）、弹性模量（MOE）以及胶合强度（BS）,以评估材料的老化性能。结果表明：均质结构的新型集装箱底板的尺寸稳定性最好,其老化后TS降低率及WA（24 h）增长倍数分别为21%和1.24;均质结构的新型集装箱底板的MOR∥、MOR⊥、MOE∥、MOE⊥保留率均为最高;薄壳结构的新型集装箱底板的MOR∥、MOR⊥、MOE⊥保留率均最小,但其MOE∥保留率较内增强结构的稍大;不同二次复合胶接界面处的胶合强度保留值在85.6%～92.3%,其大小顺序为：均质芯层〉薄壳芯层〉内增强芯层〉薄壳（内增强）表层〉均质表层。

Three new structures of container flooring were subjected to aging experiments. The thickness swelling（ TS）,water absorption（ WA）,modulus of rapture（ MOR）,modulus of elasticity（ MOE） and bonding strength（ BS） of the specimens were tested. The results showed that the homogeneous structure owned the best dimensional stability. The reduction of TS and the increase of 24 h WA were 21% and 24%,respectively. The homogeneous structure also possessed the greatest retention rates of MOR∥,MOR⊥,MOE∥and MOE⊥. The thin face structure owned the smallest retention rates of MOR∥,MOR⊥and MOE⊥,however,its retention rate of MOE∥was slightly greater than that of the core strengthened structure.The retention rates of bonding strength of different secondary bonding interfaces were between 85. 6% and 92. 3%,the sequence of the structures were as follows： homogeneous core structure 〉thin shell core structure 〉core strengthened structure 〉thin shell（ core strengthened） structure 〉homogeneous face structure.