Studies on physico‐mechanical properties and thermal characteristics of polypropylene/layered silicate nanocomposites

Parija, S.; Nayak, Sanjay K.; Verma, Sushil Kumar; Tripathy, S. S.

doi:10.1002/pc.20059

Cited by 55 publications

(41 citation statements)

References 35 publications

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“…This indicates higher crystallization rate and strong heterogeneous nucleation effect on the macromolecule segments in presence of C30B nanoclay. Similar phenomenon, has also been reported by Parija et al [33] The degree of crystallinity (X c , wt.%) calculated by using DSC-measured heat of fusion is shown in Table 1. The heat of fusion of Nylon 6 crystal has been taken as 188 J=g from literature [30] .…”

Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 70%

Mechanical, Thermal and Viscoelastic Behavior of Nylon 6/Clay Nanocomposites with Cotreated Montmorillonites

Mohanty

Nayak²

2007

Polymer-Plastics Technology and Engineering

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Nylon 6 nanocomposites were prepared using melt intercalation technique. Sodium montmorillonite (Na-MMT) was modified with octadecyl ammonium salt to evaluate the effect of clay modification on the performance of the nanocomposites. A comparative account with the nanocomposites prepared, using commercial clay cloisite 30B has been presented. X-ray diffraction (XRD) studies indicated an increase in the basal spacing of organically modified clays. Further, X-ray diffractograms of the nanocomposites displayed the absence of basal reflections suggesting the formation of an exfoliated structure. Transmission electron microscopy (TEM) investigations also confirmed exfoliation of clay galleries in the nanocomposites. Differential scanning calorimetry (DSC) measurements revealed both c and a transitions in the matrix polymer as well as the nanocomposites. The crystallization temperature (T c ) exhibited a marginal increase in the C30B/Nylon 6 nanocomposites. Thermal stability of virgin Nylon 6 and the nanocomposites has been investigated using thermogravimetric analysis. Mechanical test revealed an increase in the tensile and flexural properties of Nylon 6 with the incorporation of nanoclays. Storage and loss modulus of virgin matrix increased with the incorporation of nanoclays. C30B/Nylon 6 nanocomposites exhibited optimum performance at 5% clay loading. Further, water absorption studies also confirmed comparatively lesser tendency of water uptake in these nanocomposites.

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Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 70%

Mechanical, Thermal and Viscoelastic Behavior of Nylon 6/Clay Nanocomposites with Cotreated Montmorillonites

Mohanty

Nayak²

2007

Polymer-Plastics Technology and Engineering

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“…The incorporation of both MMT and OMMT significantly increased the flexural modulus of PA6/PP blend. This could be attributed to high stiffness and aspect ratio of silicate layers [27]. Compared with the PA6/PP/MMT composite, the flexural modulus of PA6/PP/OMMT nanocomposite was higher because of the nanoscale structure, the large aspect ratio, the large surface area of the layered silicates, and the corresponding strong interaction between polymer molecules chains and silicate surface [28].…”

Section: Temmentioning

confidence: 92%

Enhancement of properties of PA6/PP nanocomposites via organic modification and compatibilization

Kusmono¹,

Ishak²,

Chow³

et al. 2008

Express Polym. Lett.

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Abstract. Nanocomposites based on polyamide 6/polypropylene (PA6/PP = 70/30) blend containing organophilic montmorillonite (OMMT) and maleated polypropylene (PP-g-MA) as compatibilizer were prepared by melt compounding followed by injection molding. Modification of montmorillonite (MMT) with dodecyalmine was successfully performed. The morphological and mechanical properties of nanocomposites were investigated by using x-ray diffraction (XRD), transmission electron microscopy (TEM), tensile, flexural, and impact tests. The thermal stability of nanocomposites was characterized by using thermogravimetric analysis (TGA) and heat distortion temperature (HDT). XRD and TEM results indicated that the intercalated structure was obtained for PA6/PP/MMT composite, a mixture of intercalated and exfoliated structures for PA6/PP/OMMT nanocomposite, and exfoliated structure for PP-g-MA compatibilized PA6/PP/OMMT nancomposite. Thermal stability and HDT of PA6/PP matrix were improved by the addition of both MMT and OMMT. The introduction of PP-g-MA into the PA6/PP/OMMT nanocomposite enhanced the properties such as stiffness, strength, ductility, impact strength, and HDT. This was attributed to the compatibilizing effect of PP-g-MA which improved interfacial adhesion between OMMT with PA6/PP matrix and also promoted the degree of exfoliation of silicate layers in the PA6/PP matrix.

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“…In last years, the formation of polymer-based organicinorganic nanocomposites has attracted extensive interest as it is an economic and simple way to enhance polymer properties. 5,32 Parija et al 32 have studied the physico-mechanical and thermal properties of PP/layered silicate nanocomposite prepared from blends of PP-95 (MFI g 10 min −1 ), poly[PP-g-MA(1%)]-2 as a compatibilizer and octadodecylamine-modified MMT-3 as a reinforcing agent. This nanocomposite showed improved thermal and mechanical (specific gravity) properties and delayed crystallization as compared to virgin PP.…”

mentioning

confidence: 99%

A one‐step preparation of compatibilized polypropylene‐nanocomposites by reactive extrusion processing

Rzaev¹,

Yilmazbayhan²,

Alper³

2007

Adv Polym Technol

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ABSTRACT:We have developed a one-step method for preparing nanocomposites based on powdered isotactic polypropylene (i-PP) as a matrix polymer (melt-flow index (MFI) = 7.2 g 10 min −1 ), oligo(i-PP-g-MA) (MFI = 35-70 g 10 min −1 ) as a reactive compatibilizer and docecylamine-surface-modified montmorillonite clay (organo-MMT). This method includes grafting maleic anhydride (MA) onto i-PP chains in the melt state under the controlled thermal degradation conditions and intercalative compounding of the obtained oligo(i-PP-g-MA) with i-PP and organo-MMT by reactive extrusion. The effect of extrusion parameters on MFI, composition and properties of the grafted i-PPs, and mechanism of formation and properties of PP/oligo(PP-g-MA)s/organo-MMT nanocomposites were investigated by FTIR, XRD, and thermal analysis (DSC, TGA, and DTA). The results indicate that the formation of nanostructured morphologies proceeds through the formation of

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Studies on physico‐mechanical properties and thermal characteristics of polypropylene/layered silicate nanocomposites

Cited by 55 publications

References 35 publications

Mechanical, Thermal and Viscoelastic Behavior of Nylon 6/Clay Nanocomposites with Cotreated Montmorillonites

Mechanical, Thermal and Viscoelastic Behavior of Nylon 6/Clay Nanocomposites with Cotreated Montmorillonites

Enhancement of properties of PA6/PP nanocomposites via organic modification and compatibilization

A one‐step preparation of compatibilized polypropylene‐nanocomposites by reactive extrusion processing

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