フィラーを充填した高分子複合材料の PTC 特性の定量的解析

• 西山 聖

  大阪市立大学大学院工学研究科

• 佐藤 絵理子

  大阪市立大学大学院工学研究科

• 山登 正文

  首都大学東京大学院都市環境科学研究科

• 堀邊 英夫

  大阪市立大学大学院工学研究科

書誌事項

タイトル別名

• Quantification of Positive Temperature Coefficient Effect on Polymers Filled with Conductive Particles
• フィラー オ ジュウテン シタ コウブンシ フクゴウ ザイリョウ ノ PTC トクセイ ノ テイリョウテキ カイセキ

抄録

 Polymer composites filled with conductive particles such as metal, carbon black (CB) and nanotube (CNT) exhibit electro conductivity, and their resistivity significantly increases with raising temperature. Particularly, semicrystalline polymer composites possess superior electro conductivity and positive temperature coefficient (PTC) effect, because conductive particles effectively connect by localizing in the amorphous phase and disconnect by a greater volume expansion near the melting point. In this study, we quantitatively analyzed the PTC effect of various composites consisting of semi-or non-crystalline polymers filled with metal or carbon particles by calculating their filler contents considering thermal volume expansion rate and degree of crystal, as a guideline for design of sensor and circuit protection devices. The revised filler content at room temperature, φ (R.T.) of poly (vinylidene fluoride) (PVDF) / nickel, CB and CNT as semicrystalline polymer composites became higher than the amount of filler loading in preparation and drastically decreased as temperature increased. In contrast, φ (R.T.) of poly (methyl methacrylate)(PMMA) / CB and CNT as noncrystalline polymer composites gradually decreased with temperature. The rate of the revised filler content at PTC, φ (PTC) and φ (R.T.) at various amounts of filler loading in preparation was a constant value in each composite, and φ (PTC) / φ (R.T.) values of PVDF / Ni, PVDF / CB,PVDF / CNT. PMMA / CB and PMMA / CNT were 0.93, 0.78, 0.74, 0.95 and 0.96, respectively. These values indicate the filler content necessary to occurring PTC effect. In comparison of each φ (PTC) / φ (R.T.) value, semicrystalline polymer and carbon filler systems were lower. The results well represent the effect of particle localization in the amorphous phase of semicrystalline polymer and strong interaction of carbon nanofillers for the PTC characteristics.

収録刊行物

• 成形加工

  成形加工 29 (1), 25-31, 2016-12-20

  一般社団法人 プラスチック成形加工学会

キーワード

• polymer composite
• conductive filler
• positive temperature
• coefficient effect

詳細情報

• CRID: 1390001204460970752
• NII論文ID: 130006694709
• NII書誌ID: AN10278882
• DOI: 10.4325/seikeikakou.29.25
• ISSN: 18837417
• ISSN: 09154027
• NDL書誌ID: 027823400
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027823400
• Web Site: https://www.jstage.jst.go.jp/article/seikeikakou/29/1/29_25/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可