Polymer blend/organoclay nanocomposite with poly(ethylene oxide) and poly(methyl methacrylate)

Kim, Hee B.; Choi, Jong-Hyuk; Lee, Chung H.; Lim, Sang Kyoo; Jhon, Myung S.; Choi, Hyoung Jin

doi:10.1016/j.eurpolymj.2004.10.042

Cited by 63 publications

(18 citation statements)

References 30 publications

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“…The PLA/LLDPE nanocomposites exhibits shear thinning behavior in the complex viscosity curve. It is well known that the presence of fillers in polymer melts not only increases their shear viscosity but also affects their shear rate dependency [30]. By fitting power law model (which is mostly used for many kinds of nanocomposites) to the viscosity curve of PLA/LLDPE nanocomposites, the values of n for PLA/LLDPE nanocomposites were calculated and listed in Table 3.…”

Section: Rheological Behaviormentioning

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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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: 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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“…In miscible systems, such as poly(methyl methacrylate) ( PMMA )/ poly(ethylene oxide) ( PEO ) [19,20] , the morphological analysis can be carried out as in a general polymeric matrix. However, in immiscible systems, such as poly(propylene) ( PP )/ poly(styrene) ( PS ), both XRD patterns and TEM observations have shown that the silicate layers were either intercalated or exfoliated, depending on their interactions with the polymer pair, and were located at the interface between the two polymers [21] .…”

Section: Morphology Of Compositesmentioning

confidence: 99%

Nanocomposites Based on Phyllosilicates: From Petrochemicals to Renewable Thermoplastic Matrices

Coltelli

Coiai

Bronco

et al. 2009

Advanced Nanomaterials

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13 IntroductionPolymer -phyllosilicate nanocomposites, which are characterized by the presence of fi llers that are less than 100 nm in at least one dimension, have been the subject of many reviews and reports during the past decade [1, 2] . The excellent balance between performance and fi ller content (2 -5% by weight of phyllosilicates is suffi cient to provide clear improvements in properties) makes these composites especially interesting as innovative materials for a variety of applications. Such improvements, which include high moduli, increased strength and heat resistance, and decreased gas permeability and fl ammability, can be ascribed to a fundamental feature of polymer nanocomposites, namely that the small size of the fi llers leads to a dramatic increase in interfacial area when compared to traditional composites [3] .Many studies have been initiated by considering conventional petrochemicalderived polymer matrices, such as polyolefi ns, polyamides, and polyesters. Typically, the preparation methods underwent intense examination, the aim being to correlate the structure and morphology of these new nanostructured materials with their ultimate properties.Today, the development of renewable polymeric materials with excellent properties forms the subject of active research interest worldwide [4] , with aliphatic polyesters being among the most promising materials for the production of high -performance, environment -friendly, biodegradable plastics [5] . The need to optimize their properties, in order that in time they can replace present -day commodities, requires the assessment of new, selective, effi cient, and sustainable preparation methods. Hence, a comparative review of the preparation methods for both commodities and renewable polyester -based materials should allow comparisons to be made of these two classes of material in terms of their potential and future opportunities.

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“…They found that PMMA has higher affinity than PEO toward organoclays through the combination of X-ray diffraction, melting point depression of PEO. Kim et al has also investigated the viscoelastic properties of PEO/PMMA/Organoclay nanocomposites [25]. Moreover, Shen et al [26] reported the melt intercalation of PEO and PMMA into two different layered silicates, Na + -MMT and organically modified bentonite, via sequential and simultaneous methods.…”

Section: Introductionmentioning

confidence: 97%

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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Polymer blend/organoclay nanocomposite with poly(ethylene oxide) and poly(methyl methacrylate)

Cited by 63 publications

References 30 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

Nanocomposites Based on Phyllosilicates: From Petrochemicals to Renewable Thermoplastic Matrices

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

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