Investigation of interfacial adhesion in nylon-6 fibre/NBR composites through restricted equilibrium swelling technique

Authors: Rajesh, C.¹; Unnikrishnan, G.²; Purushothaman, E.¹

Source: Composite Interfaces, Volume 15, Number 5, 2008 , pp. 527-548(22)

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Abstract:

Short nylon-6 fibre reinforced acrylonitrile butadiene rubber (NBR) composites were prepared and the interfacial adhesion was evaluated by the restricted solvent swelling technique. The solvents used were N,N-dimethyl formamide (DMF), dimethyl sulphoxide (DMSO) and acetonitrile. As the fibre content increased, the solvent uptake decreased, which has been attributed to the increased hindrance to solvent penetration due to better fibre-rubber interaction. It was observed that the ratio of change in volume fraction of rubber before and after swelling to the volume fraction of rubber before swelling (V₀ - V_r/V₀) was lower for a bonding agent added composite, compared to the unbonded one. Anisotropic swelling studies were carried out to analyze the extent of fibre alignment and fibre-matrix interaction. It was seen that in strongly bonded composites, the swelling mainly took place in the thickness direction. The rubber-fibre interaction has also been examined by the Lorenz-Parks and Kraus equations.

Keywords: NYLON-6 FIBRE; NITRILE BUTADIENE RUBBER; COMPOSITES; INTERFACIAL ADHESION; BONDING AGENT; RESTRICTED EQUILIBRIUM SWELLING

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156855408784655274

Affiliations: 1: Department of Chemistry, University of Calicut-673635, Kerala, India 2: Polymer Science & Technology Laboratory, National Institute of Technology, Calicut-673601, Kerala, India

Publication date: 2008-06-01