中文摘要：

为了研究结晶形态对聚合物电树枝化的影响,采用不同型号的聚丙烯树脂,通过偏光显微镜（PLM）对其结晶形态进行表征,研究了交流电压作用下不同型号的聚丙烯树脂的树枝化特性,如：电树生长速度、电树枝形状等。结果表明：型号为1300的聚丙烯在不同条件下的电树枝生长速度都相对较慢,具有较好的耐电树枝化性能。电树枝在球晶内生长缓慢,而在晶区和非晶区的晶界面快速生长。

英文摘要：

Electrical tree is a crack phenomenon happened in polymer materials; it is an electrical aging phenomenon that seriously threatens the operation safety of power equipment, in which polymer is taken as main insulation material. Various polypropylene resins were used in analyzing the effects of crystalline morphology on the electrical treeing in polymers; and the crystalline morphology was characterized by polarized light microscopy. The electrical treeing performance such as the shape and growth of electrical tree in polypropylene resins under different ac voltages were studied by experiment. The results indicate that the growth rate of electrical tree in type 1300 polypropylene is relatively slower that means a better electrical tree resistance property. The electrical tree grows slowly within spherules, while quickly in the amorphous region.