粉末NBR-PVC共混型热塑性弹性体断裂面的分形维数  

Fractal Dimension of Powder NBR-PVC Blend TPE Fracture Surfaces

作　　者：张永海[1] 白宝丰[1] 申长雨[2] 陈静波[2] 

机构地区：[1]郑州轻工业学院河南省表界面科学重点实验室 [2]郑州大学橡塑模具国家工程研究中心,河南郑州450002

出　　处：《高分子材料科学与工程》2009年第1期55-58,共4页Polymer Materials Science & Engineering

摘　　要：本文利用扫描电镜对粉末NBR-PVC共混型热塑性弹性体拉伸断面形貌进行了观察与分析;基于断面小岛周长-面积关系,测定了试样的断口分形维数,考察了NBR含量、拉伸断面分形维数、力学性能(拉伸强度、断裂伸长率、邵氏硬度)之间的关系。结果表明,NBR-PVC弹性体拉伸断面的分形维数随着NBR含量的增加而增加,当NBR含量超过29份后其分形维数呈下降趋势;分形维数与材料的拉伸强度、断裂伸长率和邵氏硬度变化关系一致。NBR-PVC blend TPE fracture surfaces were observed and analyzed by SEM. Fractal dimensions were calculated based on perimeter-area relation. The relationship among NBR contents, fractal dimension of fracture surfaces and mechanical properties （tensile strength, elongation at break, Shore hardness） was studied. The results show that fractal dimension of NBR-PVC TPE fracture surfaces increases as NBR content increases. Fractal dimension tends to decrease as NBR content exceeds 29. And the change of fractal dimension is consistent with that of tensile strength, elongation at break, Shore hardness for NBR-PVC TPE.

关 键 词：丁腈橡胶 NBR—PVC热塑性弹性体 断裂面 分形 分形维数 

分 类 号：TQ334.9[化学工程—橡胶工业]