TY - JOUR
AU - Li, Lin
AB - Biaxially oriented polypropylene (BOPP) and uniaxially oriented polypropylene (UOPP) films were annealed. The effect of annealing temperature (<i>T</i><sub>a</sub>) on dielectric strength was studied. The electric breakdown strength (<i>E</i><sub>b</sub>) of BOPP and UOPP films changes in a quite different trend with the annealing process. <i>E</i><sub>b</sub> of BOPP films decreases with the increase in <i>T</i><sub>a</sub>, whereas <i>E</i><sub>b</sub> of UOPP films increases first and then decreases with <i>T</i><sub>a</sub>. The structural changes during annealing were investigated. The crystallinity rises with <i>T</i><sub>a</sub>, while the orientation degree and <i>E</i><sub>b</sub> show a similar trend with <i>T</i><sub>a</sub>. Although the crystallinity and crystal structure can affect <i>E</i><sub>b</sub> of polypropylene films, the orientation of chain segments has a much larger correlation with <i>E</i><sub>b</sub>. Our results indicate that the deterioration of the metallized BOPP film capacitor may originate from the orientation degree decrease of chain segments after experiencing high temperature.
TI - The Effect of Annealing on the Structure and Electric Performance of Polypropylene Films
JO - International Journal of Polymer Science
DO - 10.1155/2022/5970484
DA - 2022-11-08
UR - https://www.deepdyve.com/lp/wiley/the-effect-of-annealing-on-the-structure-and-electric-performance-of-dwzQfATuf0
VL - 2022
IS - 
DP - DeepDyve
ER -