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5167966 
Journal Article 
Enhancement of mechanical properties of kevlar-epoxy composite by improving the interface coupling 
Khan, MB; Hussain, S; Hussain, R; Khan, ZM 
2010 
Journal of Advanced Materials
ISSN: 1070-9789 
SAMPE PUBLISHERS 
COVINA 
42 
3 
74-87 
English 
WOS:000284517300008 
The surface of Kevlar fibers was chemically modified by treatment with phthalic anhydride (PA), which was confirmed by DSC and FTIR spectroscopy. The surface modification improved the adhesion to epoxy resin by 21%. SEM revealed marginal surface roughening without compromising fiber strength. Interlaminar shear (ASTM D2344) and flexure strength of unidirectional laminates were measured. Interlaminar shear strength of modified composites increased by 16%. Although the improvement in adhesion was modest, dynamic mechanical thermal analysis (DMTA) revealed an order of magnitude increase in the elastic modulus of the interface-modified composite. 
Engineering; Materials Science; fiber-matrix adhesion, aramid-fibers, strength, reinforcement,; interphase