Cyanoacrylate adhesives curable to flexible polymeric materials by poly(L-lactide-co-ε-caprolactone)

To improve the mechanical properties such as flexibility and bond strength of cyanoacrylates. poly(L-lactide-co-epsilon-caprolactone) (PLCL) copolymers were dissolved into 2 kinds of cyanoacrylates, ethyl 2-cyanoacrylate (EC) and ally! 2-cyanoacrylate (AC) Mechanical properties such as bond strength, bending-stress recovery, and crystallization intensity were measured The optimal concentration for high bond strength was determined to be 8% PLCL (molar ratio 70 30). EC/8% PLCL (70 30) exhibited three times higher bond strength as compared with that of EC Fur her. AC/8% PLCL (50 50) exhibited better bending recovery than other materials. These results indicate that cyanoacrylate/PLCL materials can be widely used as adhesives in various fields (C) 2010 Elsevier B V All rights reserved