The Structure–Property Relationship of Poly(amide-imide)/Organoclay Nanocomposites

Abstract

Surface treated montmorillonite (MMT) was used to prepare nanocomposites with poly(amide-imide) (PAI) 5 by solution intercalation technique with various percent of organoclay (5-15 mass %). Surface modification of the MMT was performed with Cloisite 20 A for ample compatibilization with the PAI matrix. The PAI 5 chains were produced through polycondensation of 4,4-diamino diphenyl sulfone 4 with N -trimellitylimido-Lalanine 3 in a medium consisting of triphenyl phosphite, N -methyl-2-pyrolidone (NMP), pyridine and calcium chloride. The PAI-Nanocomposites morphology and clay dispersion were investigated by X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The effect of clay dispersion and the interaction between clay and PAI chains on the properties of PAI-Nanocomposites films were investigated by using UV-Vis spectroscopy, thermogravimetric analysis (TGA) and water uptake measurements. Thermal stability of nanocomposites increased relative to the neat polyamide with increasing organoclay content but water uptake of these materials decreased as compared to the neat polyamide indicating reduced permeability.

Highly dispersed polyamide‐11/halloysite nanocomposites: Thermal, rheological, optical, dielectric, and mechanical properties

“…This is attributed to the fact that nonuniform dispersion of nanofiller tends to aggregate ARTICLE into macroscopic size filler, which scatters light and decreases the optical quality of the nanocomposite. 37 Therefore, to retain the optical properties, uniform dispersion of nanofiller should be stressed when preparing the nanocomposites. Figure 3 shows the variation in UV-visible transmittance (300-800) spectra of PA-11 and PA-11/HNT nanocomposites containing increasing halloysite content.…”

The Effect of CdS/organic Nanostructure as Additive on the Thermal Stability of ABS Polymer

“…Consequently, improving the fire retardant behavior of polymers is a major challenge for extending their applications [1,2]. Various flame retardant additives such as halogenated compounds are limited with respect to the environmental requirements [3][4][5]. Nanocomposites are very attractive due to the fact that small amount of nanostructure can lead to great improvement in many properties such as mechanical and thermal stability.…”