Diffusion and Copolymerization of Polyacrylic Acid in Nylon 66 Fibers to Achieve Improved Thermal Protection and Higher Moisture Regain
ARMY NATICK LABS MA CLOTHING AND PERSONAL LIFE SUPPORT EQUIPMENT LAB
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Grafting of polyacrylic acid monomer to nylon 66 textile material was investigated to increasemoisture absorption and melting temperature of nylon 66. The copolymerization or fixation of a relatively low molecular weight polyacrylic acid to nylon 66 by a heat cure reaction is described. Diffusion and copolymerization of polyacrylic acid in nylon 66 fibers has been attained as indicated by examination of stained fiber cross-sections and isolation of reacted material. The mechanisms of the reaction appears to involve the amine end groups of the nylon 66 by formation of a block copolymer.