新型聚合物基复合梯度材料的制备及材料结构性能

NOVEL TECHNIQUE FOR PREPARING POLYMERIC GRADIENT MATERIALS AND RELATED STRUCTURE PROPERTIES

提出了一种采用改进的熔融挤出技术制备聚合物基梯度材料的方法,并用此方法制备了圆筒状PP/ABS梯度材料。DSC、TEM和力学性能等测试结果表明,PP/ABS梯度材料的组成和形态结构沿圆筒径向呈梯度变化,在有限的径向尺度范围内,两种组分分别经历了从连续相到分散相或从分散相到连续相的逐步转变。材料的拉伸模量随半径(或ABS含量)的增加而增加,而拉伸强度和断裂伸长率随组分相对含量的变化呈现出不同的变化趋势。

This paper proposes a novel extruding technique for preparing polymeric gradient material. A columnar PP/ABS gradient material was prepared by use of this method. The composition, morphological structure and mechanical properties of the PP/ABS gradient material along the radial direction were investigated by using DSC, TEM and tensile tests. The results indicate that the content of PP gradually decreases while ABS gradually increases with increasing radius. The TEM photographs show that the morphology also evolves with the varying in the content ratio of two polymers. A phase inversion phenomenon was recognized in this gradient material. Experimental facts show that the polymeric gradient material can be prepared successfully by using this specific extruding technique.