Structure and properties of buckypapers based on poly(methyl methacrylateco-methacrylic acid)/polyamide 6,6 and carbon nanotube intercalated montmorillonite

摘要

Considering the challenge of the tendency of carbon nanotube to aggregate, the originality of fabricating nanoconnposites with preformed network through nnicrofiltration of nanotube suspension has been focused. The nanotube may fasten together upon dispersion in a liquid suspension and filtered through a fine mesh forming a thin film known as buckypaper. In this study, initially poly(methyl methacrylate-co-methacrylic acid) (PMMAMA) and polyannide 6,6 (PA-6,6) blend was formed. Later, the matrix was reinforced with carbon nanotube and nnontnnorillonite modified carbon nanotube (CNT-MMT). In this way, two series of buckypapers, PMMAMA/PA-6,6/CNT 0.5-5 and PMMAMA/PA-6,6/CNT-MMT 03-5, were prepared with varying CNT and CNT MMT content. PA-6,6 was in situ polymerized and the effect of filler inclusion on number and weight average molecular weight was studied. Studies were performed using gel-permeation chromatography, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, thermogravimetric analysis, and cone calorimetry to explore the structure, morphology, thermal, and flammability properties of high-performance composites. PMMAMA/PA-6,6/CNT MMT revealed CNT MMT network morphology with triangular porous structure. Thermal stability of PMMAMA/PA-6,6/CNT MMT 0.5-5 system was found higher than PMMAMA/PA-6,6/CNT 0.5-5. The PHHR of PMMAMA/PA-6,6/CNT MMT was decreased from 342 to 211 kW/m(2) with 0.5 to 5 wt% loading.