SYNTHESIS AND CHARACTERIZATION OF NYLON-6 TRIBLOCK COPOLYMER USING NEW HYBRID SOFT SEGMENT

This paper reports a new method for synthesis of A-B-A type of tribloc k copolymer of nylon 6 by anionic polymerization route. The A segments are of nylon 6 units and B segments are flexible soft segments blocks . These soft segments are b-a-b type cooligomers and are novel. Two se ries of triblock copolymer of nylon 6 are synthesized. in each series soft segment B are different. In one series soft segment B is prepared from amine terminated acrylonitrile butadiene copolymer (Hycar ATBN), Hexamethylene diisocyanate (HDI), and polyethylene glycol (M-n = 2000 ). In the other series, diol is changed to polypropylene glycol (M-n = 2000). Details of synthesis are given. Polymers are characterized by various spectroscopic techniques. Physical, mechanical and thermal pro perties of the polymers are also reported. (C) 1997 Elsevier Science L td.