Insitu co-polymerization of ɛ-caprolactam and polyether polyol toward amorphousPA

Since the 1940s polyamides have become one of the most important engineering plastics. Amorphous Polyamide 6 (PA6) is an important sample of this plastics. It offers a uniquecombination of high mechanical strength,superior transparency and good chemical resistance.(1) Polyamide 6 was synthesized in an internal mixer via anionicring-opening polymerization of ɛ-caprolactam as a monomer in the present of sodium caprolactam as a catalyst , toluenediisocyanate as an activator and polyether as a comonomer. This reaction takes place at a significantly faster reaction rate and gives a narrow molecular weight distribution than the other techniques.Due to this advantage,anionic polymerization of ɛcaprolactam towards PA6 in melt blending was investigated inthis work.(2,3) Actually we follow amorphous structure of PA6 In this study, because of superior transparency, good barrier properties togases,water,solvents and essential oils and high temperature structural properties which make it suitable for consideration in a number of applications.(4)