聚丙烯用于设计制备木塑复合板材

Polypropylene for Design and Preparation of Wood-Plastic Boards

本论文使用聚丙烯膜作为胶黏剂与原木板叠加而制备成木塑复合材料。通过对木板表面的改变、聚丙烯薄膜的用量和木纹方向的变化,采用热压成型工艺成功制备了多层的木塑复合板材,并对其进行冲击性能、硬度、吸水率、老化试验等相关测试,研究了不同变量下材料的力学性能。结果表明,使用双层聚丙烯膜且交错排列制备的复合板材冲击强度最好,达到34.23 kJ/m2,吸水率最小是41.8%。聚丙烯膜用量的增加可以使其板材结合更加牢固,减少木板表面孔隙,提高了冲击强度,降低了吸水率,提高了抗老化性能。

In this thesis, polypropylene film was used as adhesive to prepare wood-plastic boards by stacking with the log board. By changing the surface of the wood panel, the amount of polypropylene film and the direction of the wood grain, a multilayer wood-plastic composite panel was successfully prepared by the hot pressing molding process, the impact properties, hardness, water absorption, aging test and other related tests were carried out to study the mechanical properties of materials under different variables. The results show that the impact strength of the composite sheet prepared by double polypropylene film and staggered arrangement is the best, reaching 34.23 kJ/m2, and the water absorption rate is the minimum of 41.8%. The increase in the amount of polypropylene film can make the board bond more firmly, reduce the surface pores of the board, improve the impact strength, reduce the water absorption and improve the aging resistance.