Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Synthesis and Characterization of Aromatic–Aliphatic Polyamide Nanocomposite Films Incorporating a Thermally Stable Organoclay | Nanoscale Res Lett 2009 4 391-399 DOI s11671-009-9258-1 NANO EXPRESS Synthesis and Characterization of Aromatic-Aliphatic Polyamide Nanocomposite Films Incorporating a Thermally Stable Organoclay Sonia Zulfiqar Muhammad Ilyas Sarwar Received 24 November 2008 Accepted 8 January 2009 Published online 30 January 2009 to the authors 2009 Abstract Nanocomposites were synthesized from reactive thermally stable montmorillonite and aromaticaliphatic polyamide obtained from 4-aminophenyl sulfone and sebacoyl chloride. Carbonyl chloride terminal chain ends were generated using 1 extra sebacoyl chloride that could interact chemically with the organoclay. The distribution of clay in the nanocomposites was investigated by XRD SEM and TEM. Mechanical and thermal properties of these materials were monitored using tensile testing TGA and DSC. The results revealed delaminated and intercalated nanostructures leading to improved tensile strength and modulus up to 6 wt addition of organoclay. The elongation at break and toughness of the nanocomposites decreased with increasing clay contents. The nanocomposites were thermally stable in the range 400450 C. The glass transition temperature increased relative to the neat polyamide due to the interfacial interactions between the two phases. Water uptake of the hybrids decreased upon the addition of organoclay depicting reduced permeability. Keywords Nanocomposites Polyamides Nanostructure Organoclay Mechanical properties Thermal properties Introduction There have been numerous reports describing the preparation and characterization of polymer-based clay S. Zulfiqar M. I. Sarwar El Department of Chemistry Quaid-i-Azam University Islamabad 45320 Pakistan e-mail ilyassarwar@ nanocomposites. Typically this involves reinforcing a polymer with modified clay ceramic type filler . The degree of homogeneity and adhesion between the organic polymer and inorganic clay components can be improved using reactive organoclay which .
