Studies of particle dispersion in plasticized poly(vinyl chloride)/montmorillonite nanocomposites

Abstract

Poly(vinyl chloride)(PVC) and dioctyl phthalate (DOP) were mixed with 5 and 10 wt % of Cloisite Na þ , Cloisite 30B or Cloisite 93A. The obtained nanocomposites were characterized by thermal analysis using a thermogravimetric analyzer which showed that addition of 5 wt % of nanoclay to PVC increased its thermal stability in the sequence: Cloisite Na þ < Cloisite 93A< Cloisite 30B. The electrical conductivity of these composites was studied as a function of temperatures and showed that the conductivity of PVC was enhanced upon using 5 wt % of nanoclay in the sequence: Cloisite Na þ < Cloisite 30B < Cloisite 93A. The activation energy of interaction of PVC with nanoclay was found to be lowest for the composite containing 5 wt % of nanoclay in the same sequence. The tensile strength, elongation (%), and Young's modulus were considerably enhanced upon increasing the clay content to 5 wt % in the sequence: Cloisite Na þ < Cloisite 93A < Cloisite 30B. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study these nanocomposite structures, and it was found that the organoclay layers are homogeneously dispersed in the PVC matrix when 5 wt % of Cloisite 30B or Cloisite 93A was used.

Rice husk ash: Economical and high-quality natural-based reinforcing filler for linear low-density and high-density polyethylene

“…As a result, the strength of the polymer composite is enhanced that can be due to the increased rigidity, that is, inorganic particles in the polymer matrix play the role of cytoskeleton. 67,68…”

“…As a result, the strength of the polymer composite is enhanced that can be due to the increased rigidity, that is, inorganic particles in the polymer matrix play the role of cytoskeleton. 67,68 It is worth mentioning that the decrease in elongation at break may be attributed to the enhanced porosity, to the early void formation at low strains during tensile elongation, and also to the heterogeneities of the RiHA distribution in the polymer matrices. On the other hand, incorporating the solid powdery inorganic RiHA (that is not ductile) into the polymers with long chain molecules (i.e.…”

Preparation of organoclay, its copolymerization with MMA, and use to produce PVC nanocomposites

“…Natural mineral fillers are currently blended with PVC to improve its heat resistance temperature. [19][20][21] Ismail and Munusamy 22 took organoclays as additives to prepare poly (vinyl chloride)/montmorillonite nanocomposites (PVC/MMT) with partially intercalated structure, and the tensile properties, and thermal degradation of the nanocomposites were discussed. Liu et al 23 prepared PVC/PMMA-grafted halloysite nanotubes.…”