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Toughening polymer adhesives using nanosized elastomeric particles

Published online by Cambridge University Press:  11 March 2014

Qingshi Meng ,
Sherif Araby ,
Nasser Saber ,
Hsu-Chiang Kuan ,
Jiabin Dai ,
Lee Luong ,
Jun Ma  and
Chun H. Wang
Qingshi Meng
Affiliation:
School of Engineering, University of South Australia, SA 5095, Australia; and Mawson Institute, University of South Australia, SA 5095, Australia
Sherif Araby
Affiliation:
School of Engineering, University of South Australia, SA 5095, Australia
Nasser Saber
Affiliation:
School of Engineering, University of South Australia, SA 5095, Australia
Hsu-Chiang Kuan
Affiliation:
Department of Energy Application Engineering, Far East University, Tainan 744, Taiwan
Jiabin Dai
Affiliation:
School of Engineering, University of South Australia, SA 5095, Australia
Lee Luong
Affiliation:
School of Engineering, University of South Australia, SA 5095, Australia
Jun Ma*
Affiliation:
School of Engineering, University of South Australia, SA 5095, Australia; and Mawson Institute, University of South Australia, SA 5095, Australia
Chun H. Wang*
Affiliation:
Sir Lawrence Wackett Aerospace Research Centre, School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Melbourne, Victoria 3001, Australia
*
a)Address all correspondence to these authors. e-mail: jun.ma@unisa.edu.au
b)e-mail: chun.wang@rmit.edu.au
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Abstract

Nanoparticles of ∼55 nm in diameter have been found to significantly increase the fracture toughness of nanocomposites with a ductile polymer matrix. This paper presents a comparative study of the effectiveness of micrometer-sized and nanosized elastomeric particles in improving the fracture toughness and strength of polymeric adhesives. Particular focuses are on the effects of particle size, matrix ductility, and adhesive thickness on the shear strength and fracture toughness. The results reveal that for an epoxy adhesive cured with a J400 hardener, nanosized particles can produce nearly 18 times more increase in fracture toughness than what can be achieved using micrometer-sized particles at the same volume fraction of 5.0 vol%. This huge improvement of adhesives' fracture toughness by nanosized particles is similar to that observed in bulk nanocomposites, indicating that the superior toughening mechanism of nanosized elastomeric particles is equally effective in thin adhesives constrained by stiff adherends.

Keywords

nanostructureadhesivefracture toughness
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 5 , 14 March 2014 , pp. 665 - 674
Copyright
Copyright © Materials Research Society 2014 

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References

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