Environmental and multi-reinforcing effects of micro and nano fibers on adhesion properties of slow setting epoxy adhesives

The use of sustainable hybrid components is an important topic in lightweight automotive applications. Wood being a renewable material, when used in combination with other materials such as technical polymers, offers a high potential for producing hybrid components and the implementation of innovative lightweight automotive materials. The feasibility of wood-based hybrid automotive components strongly depends on the properties of the interface between wood, lignin as a renewable coupling agent, and technical polymers. This paper investigates the macromolecular reactions and the bonding area in biobased epoxy adhesives for a specific influence on the performance of structural automotive wood components. Therefore, a typical bisphenol A diglycidyl ether epoxy adhesive was modified with lignosulphonate to increase the penetration depth. The composites were characterized by thermogravimetric analysis coupled with Fourier-transform infrared spectroscopy to validate the crosslinking of the macromolecules and the thermal stability of the adhesive. In the next step, a layer-by-layer composite was built up with the biobased adhesive and 1 mm beech veneer. The bonding area was characterized by scanning electron microscopy and compression tests.

Download Full-text

Influence of polyether chain and synergetic effect of mixed resins with different functionality on adhesion properties of epoxy adhesives

International Journal of Adhesion and Adhesives ◽

10.1016/j.ijadhadh.2004.08.001 ◽

2005 ◽

Vol 25 (4) ◽

pp. 296-300 ◽

Cited By ~ 12

Author(s):

Xiaolong Hu ◽

Pengcheng Huang

Keyword(s):

Synergetic Effect ◽

Adhesion Properties ◽

Epoxy Adhesives

Download Full-text

Significant Enhancement of the Adhesion Properties of Chemically Functionalized Polypropylene

Science of Advanced Materials ◽

10.1166/sam.2019.3679 ◽

2019 ◽

Vol 11 (12) ◽

pp. 1699-1704 ◽

Cited By ~ 1

Author(s):

Byoungsang Lee ◽

Jun Hyuk Heo ◽

Jin Woong Lee ◽

Hui Hun Cho ◽

Jung Heon Lee

Keyword(s):

Photoelectron Spectroscopy ◽

Polymeric Materials ◽

Diglycidyl Ether ◽

Chemical Crosslinking ◽

Organosilicon Compounds ◽

Adhesion Properties ◽

X Ray ◽

Epoxy Adhesives ◽

Amine Functionalized ◽

Bisphenol A Diglycidyl Ether

Organosilicon compounds have been actively used with nano- and micro-fillers to improve the adhesion and mechanical properties. However, studies on the adhesion properties of polymeric materials, such as polypropylene (PP), functionalized with organosilicon compounds are limited. Here, we investigated the adhesion of organosilanized PP substrates, functionalized using (3-glycidoxypropyl)trimethoxysilane (GPTMS) and (3-aminopropyl)trimethoxysilane (APTMS) as coupling agents, with epoxy adhesives. The curing of epoxy-functionalized PP (PP-EPOXY) with triethylenetetramine (TETA) hardener led to the chemical crosslinking of TETA with PP-EPOXY, as determined by X-ray photoelectron spectroscopy and vacuum Fourier-transform infrared spectroscopy. Similarly, the curing of amine-functionalized PP (PP-NH2) with bisphenol A diglycidyl ether (DGEBA) epoxy resin led to the chemical crosslinking of the resin with PP-NH2. Finally, we measured the adhesion properties of the functionalized PP substrates using an adhesive composed of DGEBA and TETA based on ASTM D3163 and observed that the shear strength of PP-EPOXY and PP-NH2 increased significantly up to 580% and 506% as compared with that of bare PP. These results strongly suggest that the functionalization of PP significantly contributes to the improvement of adhesion with an adhesive.

Download Full-text