Polymorphism in nylon‐11/montmorillonite nanocomposite

Abstract

The polymorphism behavior in nylon‐11/montmorillonite (MMT) nanocomposite was investigated by wide‐angle X‐ray diffraction (WAXD) and variable‐temperature infrared spectroscopy. The results of WAXD and IR confirmed the presence of the γ‐crystalline form of nylon‐11, which is induced and stabilized by MMT. However, the hydrogen bond in the nanocomposite and its temperature dependence also exhibited some differences from neat nylon‐11. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 253–259, 2004

Thermal and mechanical properties of polyamide 11 based composites reinforced with surface modified titanate nanotubes

“…The X-ray diffraction patterns of neat PA11 and the PA-NT/H-2% composite (in which the highest crystallinity was detected by the DSC analyses), presented in Fig. 4, exhibit two broad peaks at 2h of 5.9°(1.52 nm) and 21.6°(0.42 nm), usually associated with the triclinic a-and pseudohexagonal c-forms of PA11 [30,31]. The anisotropy of the second peak is due to the hump attributed to the amorphous part of PA11.…”

Preparation and characterization of electrospun fibers of Nylon 11

“…The crystalline structure and polymorphism of Nylon 11 has been studied by several researchers [23][24][25][26][27][28]. It has been reported that the α form of Nylon 11 exhibits two characteristic reflections at 2θ = 20.2 and 23.01° [23] whereas the γ form of Nylon 11 exhibits a characteristic reflection at 2θ = 21.34° [24].…”

Crystallization behavior of nylon 11/montmorillonite nanocomposites under annealing

“…By now, research is mainly focused on the influence of clay on the crystallization of nylon 11. 27,28 As nylon 6/clay hybrid materials exhibit excellent properties, it is expected that the properties of nylon 11 will also be improved by the preparation of its corresponding nanocomposites. However, the effects of layered MMT on the crystallization of nylon 11 have received little attention, especially the influence of annealing treatments.…”