Morphological, rheological and thermal studies in melt processed compatibilized PA6/ABS/clay nanocomposites

As’habi, L.; Jafari, Seyed Hassan; Khonakdar, Hossein Ali; Baghaei, Bahareh

doi:10.1007/s10965-010-9407-3

Cited by 47 publications

(36 citation statements)

References 38 publications

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“…This change in behavior towards a solid like behavior can be attributed to the morphological changes i.e. refinement of the dispersed phase by addition of nanoclays to this system [29]. Referring to the SEM micrographs due to agglomeration of nanoclay particles at higher loading, the significant refinement of the dispersed phase is not observable (Figures 6c and 7c).…”

Section: Rheological Behaviormentioning

confidence: 92%

“…In this context addition of compatibilizer to a clay-containing multiphase system can have its own contribution towards clay positioning and its state of dispersion due to induced changes in the system thermodynamic. This topic has been discussed intensively in the literature [19][20][21][22][23][24][25][26][27][28][29]. Undoubtedly, the mixing procedure has also a strong effect on the localization of nanoclay.…”

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confidence: 99%

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Tuning the processability, morphology and biodegradability of clay incorporated PLA/LLDPE blends via selective localization of nanoclay induced by melt mixing sequence

As’habi¹,

Jafari

Khonakdar³

et al. 2013

Express Polym. Lett.

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Abstract. Polylactic acid (PLA)/linear low density polyethylene (LLDPE) blend nanocomposites based on two different commercial-grade nanoclays, Cloisite ® 30B and Cloisite ® 15A, were produced via different melt mixing procedures in a counter-rotating twin screw extruder. The effects of mixing sequence and clay type on morphological and rheological behaviors as well as degradation properties of the blends were investigated. The X-ray diffraction (XRD) results showed that generally the level of exfoliation in 30B based nanocomposites was better than 15A based nanocomposites. In addition, due to difference in hydrophilicity and kind of modifiers in these two clays, the effect of 30B on refinement of dispersed phase and enhancement of biodegradability of PLA/LLDPE blend was much more remarkable than that of 15A nanoclay. Unlike the one step mixing process, preparation of nanocomposites via a two steps mixing process improved the morphology. Based on the XRD and TEM (transmission electron microscopic) results, it is found that the mixing sequence has a remarkable influence on dispersion and localization of the major part of 30B nanoclay in the PLA matrix. Owing to the induced selective localization of nanoclays in PLA phase, the nanocomposites prepared through a two steps mixing sequence exhibited extraordinary biodegradability, refiner morphology and better melt elasticity.

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Section: Rheological Behaviormentioning

confidence: 92%

mentioning

confidence: 99%

Tuning the processability, morphology and biodegradability of clay incorporated PLA/LLDPE blends via selective localization of nanoclay induced by melt mixing sequence

As’habi¹,

Jafari

Khonakdar³

et al. 2013

Express Polym. Lett.

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“…Recently, organic-inorganic hybrids with nano-structure have been developed to form nanocomposites, which rendered advanced performance in thermal stability, stiffness, and processibility with the high dispersion of nanoparticles, such as nanoclays. These outstanding material properties have led to profound research on numerous polymer/clay nanocomposite systems [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of chitosan/clay (nano)composites: a silanol quaternary ammonium intercalated clay

Chiu¹,

Lai²,

Hsieh³

et al. 2012

J Polym Res

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Chitosan/clay (nano)composites were prepared by using a special quaternary ammonium intercalating agent coupled with a silanol group to facilitate the organic clay formation. Exfoliated clay in the chitosan matrix was attained at the higher intercalant dosages through X-ray diffraction (XRD) and transmission electron microscope (TEM) analyses. Optical transmittance for the (nano)composites increased slightly with increasing the amount of intercalants in the clays. In light of the hydrophobic component on the intercalant and the effective clay content, the interfacial interaction between chitosan and modified clay may not be strong enough to render higher mechanical properties, even though the partially exfoliated clays were achieved to provide high interfacial area for the dispersed phase and the matrix. An optimum Young's modulus was thus found for (nano)composites using modified clay at a medium dosage of intercalant, which resulted from the balance of the dispersion status and interfacial interaction. This outcome indicated high dispersion of modified clay may not guarantee high mechanical properties of (nano)composites. The antimicrobial property of chitosan against Escherichia coli (E. coli) increased further with the addition of modified clays, in which the intercalant exhibiting the antimicrobial function. The modified clay at an optimum dosage of modifier to balance the mechanical properties and antimicrobial property was attained.

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“…These enhanced physical properties are usually in the forms of decreased flammability, improved heat resistance, and increased moduli. Controlling the microstructure of polymer nanocomposites with the aim of achieving desirable properties has been the subject of many studies [5][6][7]. Three possible structures are usually observed in PLSNCs.…”

Section: Introductionmentioning

confidence: 99%

Nanoclay dispersion in a miscible blend: an assessment through rheological analysis

et al. 2012

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In this study, miscible polymer blend nanocomposite of Poly(ethylene oxide)/Poly(methyl methacrylate), (PEO/PMMA), with sodium montmorillonite (Na + -MMT) clay were prepared at a constant concentration of nanoparticles via different solution intercalation methods. The resultant nanocomposites possess different structure and dispersion of Na + -MMT clays which are assessed through a combination of transmission electron microscopy (TEM) and X-ray diffraction (XRD). The rheology of the neat blend and two different layered silicate nanocomposites were investigated using linear viscoelastic measurements with a parallel plate rheometry at small strain amplitudes. It was found that regardless of the extent of dispersion, the storage and loss modulus increased by incorporating the nanoparticles into the matrix of PEO/PMMA. Moreover, at low frequencies the rheological response of the nanocomposite in which layered silicates benefit from a better dispersion becomes relatively invariant with frequency and represents a mediocre solid-like behavior in comparison to the nanocomposite in which the nanoparticles are intercalated or agglomerated.

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Morphological, rheological and thermal studies in melt processed compatibilized PA6/ABS/clay nanocomposites

Cited by 47 publications

References 38 publications

Tuning the processability, morphology and biodegradability of clay incorporated PLA/LLDPE blends via selective localization of nanoclay induced by melt mixing sequence

Tuning the processability, morphology and biodegradability of clay incorporated PLA/LLDPE blends via selective localization of nanoclay induced by melt mixing sequence

Preparation and properties of chitosan/clay (nano)composites: a silanol quaternary ammonium intercalated clay

Nanoclay dispersion in a miscible blend: an assessment through rheological analysis

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