Amine-terminated Nylon 6/66/1010 (AM-6/66/1010) Used For Hot Melt Adhesives: Synthesis And Properties

A new amine-terminated nylon 6/66/1010 (AM-6/66/1010), carboxyl-terminated nylon 6/66/1010 (AC-6/66/1010) copolyamide hot melt adhesive was synthesized from caprolactam, nylon 66 salt, nylon 1010 salt and blocked with 1-hexadecylamine, stearic acid, respectively. The thermal properties of AM-6/66/1010 and AC-6/66/1010 samples were characterized by 1H-NMR spectroscopy, differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and gel permeation chromatography (GPC). The mechanical properties of AM-6/66/1010 and AC-6/66/1010 samples were characterized by electronic tensile testing machine, scanning electron microscope (SEM). The 1H-NMR spectroscopy demonstrated that 1-hexadecylamine functions as blocking agent in this polymerization. The DSC thermograms showed that the melting point and glass transition temperature of AM-6/66/1010 decreases as the mole ratio αH/C (1-hexadecylamine/total carboxyl) increases. The thermal gravimetric analysis indicated that AM-6/66/1010 hot melt adhesive has a high thermal stability. The peel strength of the test specimen obtained by hot melt glutinous lining of AM-6/66/1010 or AC-6/66/1010 and fabric 6535(65% PET,35% cotton) was studied using T-peel tests, and the results showed that the washable and dry-cleaning resistant of AM-6/66/1010 copolyamide hot melt adhesive is better than that of AC-6/66/1010 copolyamide hot melt adhesive. And the peel energy (Gp) decreases with testing temperature (T) increases, increases with peel rate (v) increases.