Relation between morphology change due to mechanical kneading and dielectric breakdown characteristics in ethylene-styrene copolymers

Yasuhiro Tanaka, Toshinobu Otsubo, Yoshimichi Ohki, Masaaki Ikeda, Fumihiko Yazaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The relation between morphological change, induced by copolymerized benzene rings or by kneading, and the dielectric strength of ethylene-styrene copolymer was studied. In unkneaded samples, the lamellar thickness decreases and the lattice constant along the a-axis increases with increasing styrene content. However, in kneaded samples, the lamellar thickness and the lattice constant remain constant up to a styrene content of 3.10 wt%. Spherulite is observed with a polarizing microscope in unkneaded samples, but it disappears in kneaded samples. Kneaded samples, especially the kneaded sample with a styrene content of 3.10 wt%, have higher breakdown strength than unkneaded samples. The styrene content of the sample showing the highest breakdown strength increases as the temperature decreases. At -50°C or -80°C, the sample with a styrene content of 15.40 wt% has the highest breakdown strength of all the samples. It is considered that benzene rings are moved to the interfacial region between lamellar and amorphous parts by kneading and hinder the acceleration of electrons along the lamellae. This effect of benzene rings becomes pronounced in the low-temperature region where the breakdown process is electronic.

Original languageEnglish
Title of host publicationProc 3 Int Conf Prop Appl Dielectr Mater
Place of PublicationPiscataway, NJ, United States
PublisherPubl by IEEE
Pages1169-1172
Number of pages4
ISBN (Print)0879425687
Publication statusPublished - 1991
Externally publishedYes
EventProceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials - Tokyo, Jpn
Duration: 1991 Jul 81991 Jul 12

Other

OtherProceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials
CityTokyo, Jpn
Period91/7/891/7/12

Fingerprint

Electric breakdown
Styrene
Ethylene
Copolymers
Benzene
Lattice constants
Microscopes
Temperature
Electrons

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Tanaka, Y., Otsubo, T., Ohki, Y., Ikeda, M., & Yazaki, F. (1991). Relation between morphology change due to mechanical kneading and dielectric breakdown characteristics in ethylene-styrene copolymers. In Proc 3 Int Conf Prop Appl Dielectr Mater (pp. 1169-1172). Piscataway, NJ, United States: Publ by IEEE.

Relation between morphology change due to mechanical kneading and dielectric breakdown characteristics in ethylene-styrene copolymers. / Tanaka, Yasuhiro; Otsubo, Toshinobu; Ohki, Yoshimichi; Ikeda, Masaaki; Yazaki, Fumihiko.

Proc 3 Int Conf Prop Appl Dielectr Mater. Piscataway, NJ, United States : Publ by IEEE, 1991. p. 1169-1172.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tanaka, Y, Otsubo, T, Ohki, Y, Ikeda, M & Yazaki, F 1991, Relation between morphology change due to mechanical kneading and dielectric breakdown characteristics in ethylene-styrene copolymers. in Proc 3 Int Conf Prop Appl Dielectr Mater. Publ by IEEE, Piscataway, NJ, United States, pp. 1169-1172, Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials, Tokyo, Jpn, 91/7/8.
Tanaka Y, Otsubo T, Ohki Y, Ikeda M, Yazaki F. Relation between morphology change due to mechanical kneading and dielectric breakdown characteristics in ethylene-styrene copolymers. In Proc 3 Int Conf Prop Appl Dielectr Mater. Piscataway, NJ, United States: Publ by IEEE. 1991. p. 1169-1172
Tanaka, Yasuhiro ; Otsubo, Toshinobu ; Ohki, Yoshimichi ; Ikeda, Masaaki ; Yazaki, Fumihiko. / Relation between morphology change due to mechanical kneading and dielectric breakdown characteristics in ethylene-styrene copolymers. Proc 3 Int Conf Prop Appl Dielectr Mater. Piscataway, NJ, United States : Publ by IEEE, 1991. pp. 1169-1172
@inproceedings{da72128731c74d3db168082e00a96903,
title = "Relation between morphology change due to mechanical kneading and dielectric breakdown characteristics in ethylene-styrene copolymers",
abstract = "The relation between morphological change, induced by copolymerized benzene rings or by kneading, and the dielectric strength of ethylene-styrene copolymer was studied. In unkneaded samples, the lamellar thickness decreases and the lattice constant along the a-axis increases with increasing styrene content. However, in kneaded samples, the lamellar thickness and the lattice constant remain constant up to a styrene content of 3.10 wt{\%}. Spherulite is observed with a polarizing microscope in unkneaded samples, but it disappears in kneaded samples. Kneaded samples, especially the kneaded sample with a styrene content of 3.10 wt{\%}, have higher breakdown strength than unkneaded samples. The styrene content of the sample showing the highest breakdown strength increases as the temperature decreases. At -50°C or -80°C, the sample with a styrene content of 15.40 wt{\%} has the highest breakdown strength of all the samples. It is considered that benzene rings are moved to the interfacial region between lamellar and amorphous parts by kneading and hinder the acceleration of electrons along the lamellae. This effect of benzene rings becomes pronounced in the low-temperature region where the breakdown process is electronic.",
author = "Yasuhiro Tanaka and Toshinobu Otsubo and Yoshimichi Ohki and Masaaki Ikeda and Fumihiko Yazaki",
year = "1991",
language = "English",
isbn = "0879425687",
pages = "1169--1172",
booktitle = "Proc 3 Int Conf Prop Appl Dielectr Mater",
publisher = "Publ by IEEE",

}

TY - GEN

T1 - Relation between morphology change due to mechanical kneading and dielectric breakdown characteristics in ethylene-styrene copolymers

AU - Tanaka, Yasuhiro

AU - Otsubo, Toshinobu

AU - Ohki, Yoshimichi

AU - Ikeda, Masaaki

AU - Yazaki, Fumihiko

PY - 1991

Y1 - 1991

N2 - The relation between morphological change, induced by copolymerized benzene rings or by kneading, and the dielectric strength of ethylene-styrene copolymer was studied. In unkneaded samples, the lamellar thickness decreases and the lattice constant along the a-axis increases with increasing styrene content. However, in kneaded samples, the lamellar thickness and the lattice constant remain constant up to a styrene content of 3.10 wt%. Spherulite is observed with a polarizing microscope in unkneaded samples, but it disappears in kneaded samples. Kneaded samples, especially the kneaded sample with a styrene content of 3.10 wt%, have higher breakdown strength than unkneaded samples. The styrene content of the sample showing the highest breakdown strength increases as the temperature decreases. At -50°C or -80°C, the sample with a styrene content of 15.40 wt% has the highest breakdown strength of all the samples. It is considered that benzene rings are moved to the interfacial region between lamellar and amorphous parts by kneading and hinder the acceleration of electrons along the lamellae. This effect of benzene rings becomes pronounced in the low-temperature region where the breakdown process is electronic.

AB - The relation between morphological change, induced by copolymerized benzene rings or by kneading, and the dielectric strength of ethylene-styrene copolymer was studied. In unkneaded samples, the lamellar thickness decreases and the lattice constant along the a-axis increases with increasing styrene content. However, in kneaded samples, the lamellar thickness and the lattice constant remain constant up to a styrene content of 3.10 wt%. Spherulite is observed with a polarizing microscope in unkneaded samples, but it disappears in kneaded samples. Kneaded samples, especially the kneaded sample with a styrene content of 3.10 wt%, have higher breakdown strength than unkneaded samples. The styrene content of the sample showing the highest breakdown strength increases as the temperature decreases. At -50°C or -80°C, the sample with a styrene content of 15.40 wt% has the highest breakdown strength of all the samples. It is considered that benzene rings are moved to the interfacial region between lamellar and amorphous parts by kneading and hinder the acceleration of electrons along the lamellae. This effect of benzene rings becomes pronounced in the low-temperature region where the breakdown process is electronic.

UR - http://www.scopus.com/inward/record.url?scp=0026279224&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026279224&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0026279224

SN - 0879425687

SP - 1169

EP - 1172

BT - Proc 3 Int Conf Prop Appl Dielectr Mater

PB - Publ by IEEE

CY - Piscataway, NJ, United States

ER -