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ID 30485
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別タイトル
Electrical Properties of Carbon Black-Graftpolymers Crosslinked with Epoxy Resin
著者
宮内 信之助
高田 敬一
大北 熊一
キーワード
カーボンブラック・グラフトポリマー
カーボンブラック
正の温度係数
NDC
技術・工学
抄録(英)
Resistors having different degrees of crosslinking were made by curing carbon black-graft polymers (grafted with n-butyl acrylate and acrylic acid) with an epoxy resin on porcelain plates, in order to obtain some information concerned with the effect of crosslinking on the large positive temperature coefficient of. electrical resistivity.

For the resistors prepared with the ratio 1/1 of carboxyl group/epoxy group, the gel fraction increased with increasing curing temperature or curing time, and therefore, the crosslinks increased. The volume resistivity decreased with increasing crosslinking and was in the range of 1-8Ωcm. The resistance temperature curves showed a distinct positive anomaly at about 80-100℃ attributable to volume expansion of polymer. The variation of resistance at 140℃ decreased with increasing crosslinking except for the samples which showed bad thermal stability against heating cycle between 40-140℃.

On the other hand, all the resistors made of polymer compositions having different ratios of carboxyl group/epoxy group and cured at 160℃ for 2 hr exhibited good thermal stability against heating cycle between 40-140℃, though their degrees of crosslinking were different. The least crosslinked resistor showed no anomaly of resistivity. It is considered that rearrangement of the carbon black network may occur toward lowering the resistance by static electric force in less crosslinked resistors.
掲載誌名
材料
28巻
312号
開始ページ
894
終了ページ
899
出版年月日
1979-09-15
出版者
日本材料学会
ISSN
0514-5163
NCID
言語
日本語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
社団法人日本材料学会
本文データは学協会の許諾に基づきCiNiiから複製したものである
関連情報URL
関連情報URL(IsVersionOf)
http://ci.nii.ac.jp/naid/110002301169
部局名
工学研究科