DocumentCode
3609438
Title
Electret stability related to spherulites in polypropylene
Author
Thyssen, Anders ; Almdal, Kristoffer ; Thomsen, Erik V.
Author_Institution
Dept. of Micro & Nanotechnol., Tech. Univ. of Denmark, Lyngby, Denmark
Volume
22
Issue
5
fYear
2015
fDate
10/1/2015 12:00:00 AM
Firstpage
2858
Lastpage
2863
Abstract
Electret charge stability has been related to the size of the spherulites in polypropylene. As the size of the spherulites is decreased the stability is increased. This is seen for isothermal conditions at 90 and 120 °C as well as for 90 % relative humidity at 50 °C. The charge release temperature is also increased in thermally stimulated voltage discharge experiments as the size of the spherulites is decreased. The size of the spherulites is controlled though the cooling rate from polypropylenes liquid state.
Keywords
electrets; polymers; thermal analysis; cooling rate; electret charge stability; isothermal condition; polypropylene; relative humidity; spherulites; temperature 50 C; temperature 90 C to 120 C; thermally stimulated voltage discharge; Cooling; Electrets; Humidity; Isothermal processes; Scanning electron microscopy; Surface morphology; Thermal stability; Crystals; electrets; humidity measurement; polypropylene films; spherulite;
fLanguage
English
Journal_Title
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher
ieee
ISSN
1070-9878
Type
jour
DOI
10.1109/TDEI.2015.004891
Filename
7311065
Link To Document