フェノール硬化型エポキシ樹脂の橋かけ密度と緩和挙動

• 尾形 正次

  (株) 日立製作所日立研究所

• 金城 徳幸

  (株) 日立製作所日立研究所

• 江口 州志

  (株) 日立製作所日立研究所

• 河田 達男

  日立化成 (株) 南結城工場

書誌事項

タイトル別名

• Cross-linking density and relaxation behavior of phenolic cured epoxy resins.

抄録

The relationship between cross-linking density (ρ _(E′)) and free volume was investigated for epoxy resins having different ρ _(E′) values. These resins were prepared from a given epoxy compound by using various accelerators. The time-temperature superposition was found to hold for the relaxation moduli of the cured epoxy resins. The shift factor α_T showed a temperature dependence of the WLF equation type. The obtained WLF parameters C^g₁ and C^g₂ gave values of free volume fraction at T_g (f_g) and thermal expansion coefficient (α_f), which were considerably different from the universal values (f_g=0.025, α_f=4.8×10^-4deg^-1) found by Ferry et al. The f_g decreased with an increase of the ρ _(E′). This tendency contradicted the fact that highly cross-linked epoxy resin had a larger specific volume in the glassy state. On the other hand, α_f became smaller with increasing ρ _(E′). This results agreed with the fact that the difference of thermal expansion coefficient above and below T_g decreased with increasing ρ _(E′).

収録刊行物

• 高分子論文集

  高分子論文集 46 (7), 413-419, 1989

  公益社団法人 高分子学会

キーワード

• Epoxy Resin
• Phenol Formaldehyde Novolac
• Accelerator
• Cross-Linking Density
• Viscoelastic Property
• Relaxation
• Shift Factor
• WLF Equation
• Free Volume
• Specific Volume

詳細情報

• CRID: 1390282681498767104
• NII論文ID: 130003837215
• DOI: 10.1295/koron.46.413
• COI: 1:CAS:528:DyaL1MXlvFGqu7o%3D
• ISSN: 18815685
• ISSN: 03862186
• ISSN: http://id.crossref.org/issn/03862186
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可