Influences of Annealing Method on the Space Charge Properties in LDPE

摘要

In this paper, low-density polyethylene (LDPE) films were prepared by three kinds of annealing methods which were different in cooling velocity. The crystallinity of the LDPE samples were measured and compared. Surfaces of samples were observed. Higher cooling velocity results in lower crystallinity. High DC negative voltage was applied on the samples, and then samples were open-circuit. Space charge formed in samples was measured during above procedure. The space charge properties were discussed based on cystallinity and morphology.