Spinning and properties of poly(ethylene terephthalate)/organomontmorillonite nanocomposite fibers

Abstract

By in situ polycondensation, a intercalated poly(ethylene terephthalate)/organomontmorillonite nanocomposite was prepared after montmorillonite (MMT) had been treated with a water-soluble polymer. This nanocomposite was produced to fibers through melt spinning. The resulting nanocomposite fibers were characterized by X-ray diffraction (XRD), differential scanning calorimeter (DSC), and transmission electron microscopy (TEM). The interlayer distance of MMT dispersed in the nanocomposite fibers was further enlarged because of strong shear stress during processing of melt spinning. This was confirmed by XRD test and TEM images. DSC test results showed that incorporation of MMT accelerated the crystallization of poly(ethylene terephthalate) (PET), but the crystallinity of the drawn fibers just had a little increasing compared with that of neat PET drawn fibers. Also compared with pure PET drawn fibers, tensile strength at 5% elongation and thermal stability of the nanocomposite fibers were improved. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci

Novel preparation method for improving the dispersion of ionic liquid‐modified montmorillonite in poly(ethylene terephthalate)

“…Modification of clay with the imidazolium ILs results in a shift in the (001) peak by 0. 8 . This corresponds to an increase in d-spacing of about 0.16 nm, indicating that the surfactant molecules are intercalated into the clay galleries.…”

“…PET/clay nanocomposites have been prepared by using in situ polymerization [3,[8][9][10], solution mixing [9,11], and melt blending [3,12,13]. Recently, a modified melt blending method was introduced in which a MMT water solution was blended with the polymer in a twin-screw extruder [14].…”

Thermal degradation kinetics of PET/SWCNTs nanocomposites prepared by the in situ polymerization

“…However, in the case of PET nanocomposites, different results have been reported. Up to now, only a few researchers discovered that the organoclays can enhance the thermal stability of PET nanocomposites prepared by in situ polymerization or melt processing [14,15]. Broza and Schulte [16] prepared PBT-PTMO/MWCNT nanocomposites by master batch process and concluded that mixing, extruding, granulating, and injection molding seems to be a good alternative to other production methods such as in situ polycondensation.…”

Adsorption and desorption of antimony acetate on sodium montmorillonite

“…There is great interest in polymer/montmorillonite nanocomposite because of its tremendously improved properties such as excellent mechanical properties [4][5][6], thermal stability [5][6][7][8], gas barrier [7,9], and flame retardation [6,8,9] compared with conventional composites. It is well known that there are two kinds of nanocomposites, intercalated or exfoliated, depending on the dispersion state of MMT layers in polymer matrix.…”