Clarification of Deterioration Mechanism of Structural Adhesives by Water Absorption

構造用接着剤の吸水劣化メカニズムの解明

Deterioration mechanism of epoxy structural adhesives by water absorption was examined. Bonding strength decreased with water absorption time, and hydrolysis of adhesive occurred. Bonding strength correlated with degree of hydrolysis defined using peak intensity ratio in Fourier Transform Infrared Spectroscope (FT-IR). Hydrolysis was confirmed in weld-bonding parts of repossessed car, therefore, deterioration of bonding strength in market was able to evaluate using degree of hydrolysis. It was assumed that the water preferentially diffuses at interface between adherent and adhesive in early stage, and then diffuses from whole edge into adhesive layer. Hydrolysis would proceed according to this water diffusion process, and bonding strength and failure mode would be determined by magnitude relation between bulk strength and bonding strength at interface.構造用接着剤の吸水劣化メカニズムを研究した。接着強度の低下は吸水による加水分解でおこり、ＦＴ－ＩＲのピーク強度比で定義した加水分解度合いと相関がある。水分は接着剤－鋼板界面を優先拡散した後に均一に拡散する。加水分解は吸水とほぼ同時に進展し、接着強度と破壊形態は界面と接着剤自体の強度低下の差で決まる。

• Record URL:
  https://doi.org/10.11351/jsaeronbun.43.543
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Clarification+of+Deterioration+Mechanism+of+Structural+Adhesives+by+Water+Absorption&author=K.+Himuro&author=A.+Sadai&author=K.+Matsui&author=H.+Sumida&author=K.+Yamamoto&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02878321
• Authors:
  • Himuro, Katsuya
  • Sadai, Asako
  • Matsui, Keiko
  • Sumida, Hirosuke
  • Yamamoto, Ken-ichi
• Publication Date: 2012

Language

• English
• Japanese

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 543-548
• Serial:
  • Transactions of Society of Automotive Engineers of Japan
  • Volume: 43
  • Issue Number: 2
  • Publisher: Society of Automotive Engineers of Japan
  • ISSN: 0287-8321
  • EISSN: 1883-0811
  • Serial URL: https://www.jstage.jst.go.jp/browse/jsaeronbun
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Adhesives; Automobiles; Bond strength (Materials); Deterioration; Epoxides; Hydrolysis; Vehicle fitness
• Subject Areas: Highways; Vehicles and Equipment; I95: Vehicle Inspection;

Filing Info

• Accession Number: 01528184
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Jun 13 2014 8:53AM