Premium
Dielectric breakdown and mechanical properties of polylactic acid of different spherulite sizes
Author(s) -
Matsugasaki Naru,
Shinyama Katsuyoshi,
Fujita Shigetaka
Publication year - 2013
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.21926
Subject(s) - spherulite (polymer physics) , polylactic acid , crystallinity , materials science , ultimate tensile strength , dielectric , composite material , breaking strength , dielectric strength , elongation , izod impact strength test , polymer , optoelectronics
The degree of crystallinity of polylactic acid (PLA) was increased by heat treatment, and the dielectric breakdown strength and mechanical properties of the obtained PLA of different spherulite sizes were studied. PLA heat‐treated at a temperature of 120 °C or higher showed rapid increases in spherulite size. At both measurement temperatures of 25 and 80 °C, the dielectric breakdown strength ( E B ) showed rapid reduction. The tensile strength at break and breaking elongation showed rapid reduction when the heat treatment temperature was 120 °C or higher. © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.