Comparison of Polyamide-6 Nanocomposites Based on Pristine and Organic Montmorillonite Obtained via Anionic Ring-Opening Polymerization

✍ Scribed by Andong Liu; Tingxiu Xie; Guisheng Yang

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 194 KB
• Volume: 207
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200600146

✦ Synopsis

Abstract

Summary: Exfoliated Na^+^‐MMT/polyamide‐6 and intercalated organic MMT/polyamide‐6 nanocomposites were prepared using sodium montmorillonite with water dispersion and organic MMT with acetone dispersion via anionic ring‐opening polymerization, respectively. The effects of Na^+^‐MMT and OMMT on the polyamide‐6 were compared. Analysis shows that incorporation of exfoliated Na^+^‐MMT obviously improved mechanical properties, thermal stability, crystalline rate and favored formation of a γ‐crystalline form of matrix, but intercalated OMMT has no obvious effect on it. Nanoscale dispersing Na^+^‐MMT dramatically elevated the viscosity of matrix comparing with pure polyamide‐6. FTIR analysis indicates that the exfoliated Na^+^‐MMT improved the stability of hydrogen bonding comparing with the OMMT treated by alkylammonium salt modifier, which is different from previous studies. It is believed that hydrogen bonding between Na^+^‐MMT and polyamide‐6 plays a pivotal role.

FTIR spectra of the NH stretching region of (a) PA, (b) PAM and (c) PAO.

imageFTIR spectra of the NH stretching region of (a) PA, (b) PAM and (c) PAO.