PET/imidazolium‐based OMMT nanocomposites via in situ polymerization: Morphological, thermal, and nonisothermal crystallization studies

Monemian, Seyedali; Goodarzi, Vahabodin; Zahedi, Payam; Angaji, Mahmood Torabi

doi:10.1002/adv.20105

Cited by 24 publications

(15 citation statements)

References 34 publications

(18 reference statements)

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“…Moreover, the lack of a delaminated or exfoliated morphology in PET nanocomposites is often due to the lack of compatibility of the organic modifiers used in commercial organoclays with the PET macromolecules. For these reasons, several studies have been performed to modify silicate nanolayers with various cationic surfactants,, mostly aimed at improving the thermal stability of commercial organoclays. Efforts have also been devoted to improve the compatibility between the organoclay and polyesters.…”

Section: Introductionmentioning

confidence: 99%

Morphology and properties of polymer/organoclay nanocomposites based on poly(ethylene terephthalate) and sulfopolyester blends

Ghanbari

Heuzey

Carreau

et al. 2012

Polymer International

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Poly(ethylene terephthalate) (PET) nanocomposite films containing two different organoclays, Cloisite 30B® (C30B) and Nanomer I.28E® (N28E), were prepared by melt blending. In order to increase the gallery spacing of the clay particles, a sulfopolyester (PET ionomer or PETi) was added to the nanocomposites via a master‐batch approach. The morphological, thermal and gas barrier characteristics of the nanocomposite films were studied using several characterization techniques such as scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, differential scanning calorimetry, dynamic mechanical analysis, rheometry and oxygen permeability. PET and PETi were found to form immiscible polymer blends and the nanoparticles were preferentially located in the PETi dispersed phase. A better dispersion of clay was obtained for nanocomposites containing N28E with PETi. On the contrary, for nanocomposites containing C30B and PETi, the number of tactoids increased and the clay distribution and dispersion became worse than for C30B alone. Overall, the best properties were obtained for the PET/C30B nanocomposite without PETi. Higher crystallinity was found for all nanocomposite films in comparison to that of neat PET. © 2012 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Morphology and properties of polymer/organoclay nanocomposites based on poly(ethylene terephthalate) and sulfopolyester blends

Ghanbari

Heuzey

Carreau

et al. 2012

Polymer International

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“…As a result, enhancement of stiffness is accompanied by a decrease in strength and toughness 16–19. One of the reasons seems to be the instability of ammonium salt‐based modifiers at processing temperatures, as confirmed by more successful results using clays with more stable modification 20–22…”

Section: Introductionmentioning

confidence: 96%

Toughening of recycled poly(ethylene terephthalate) with clay‐compatibilized rubber phase

Kelnar

Sukhanov

Rotrekl

et al. 2010

J of Applied Polymer Sci

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Recycled bottle-grade PET (rPET) is a valuable low-cost polymeric material. However, enhancement of its mechanical properties is necessary for many applications. This work is focused on clay-reinforced/compatibilized rPET/elastomer system. Although the clay addition to various rPET/elastomer blends caused a remarkable refinement of structure, more pronounced for clay with less polar modification, both a gain or decrease in strength and toughness occurred, whereas an increase in modulus was found for all systems. This is a consequence of simultaneous complex affecting many parameters by clay and both antagonistic and synergistic combination of respective effects. Best results were found for low contents of EPR rubber and its preblending with clay. The presented results indicate that a suitable combination of nanosilicates with rubber can lead to rPET materials with fairly enhanced properties.

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“…In this method, organo-modified clays are employed due to their affinity with monomers and organic compounds (Ke et al, 1999;Ke and Yongping, 2005;Kim, 2007;Lee et al, 2005;Martinez-Gallegos et al, 2009;Monemian et al, 2007;Vassiliou et al, 2001;Yin et al, 2009b). Nevertheless, am ajor part of the organomodifiers get decomposed at the relatively high temperature of polycondensation.…”

Section: Introductionmentioning

confidence: 98%

In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays

Esmaeili

Dubois

Carreau

et al. 2013

International Polymer Processing

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In this work two types of montmorillonite, ap ristine and an organo-modified clay (Cloisite 30B), were employed to produce (polyethylene terephthalate)-based nanocomposites via in situ polymerization. Using water as an intermediate medium, as table dispersion of pristine clay in ethylene glycol was achieved. However, after polymerization, no significant gain was obtained in terms of delamination of silicate platelets. The polycondensation reaction when using Cloisite 30B was carried out at at emperature as low as 250 8 Ci no rder to retain ac onsiderable portion of the organo-modifier. The results showed that Cloisite 30B was successfully intercalated by the polymer chains, resulting in ad -spacing increase from 1.9 nm to about 3.6 nm. Although some mono and double silicate layers were observed in microscopy images, the major part of the organoclay remained in at actoid intercalated form. Sampling during the polycondensation reaction revealed that, in this process, clay was first swelled efficiently by the monomer, and this structure was preserved in the early stage of polycondensation. However, the silicate platelets collapsed with time as the polycondensation progressed and larger molecular weight oligomers were formed. An investigation on the type of impeller used in the polymerization process showed that as light improvement was achieved in terms of aggregate size and distribution when the anchor impeller was replaced by ah elical one. 1I ntroductionPolyethylene terephthalate (PET) is asemi-crystalline polymer with avariety of applications in the fields of packaging, beverage bottles, textile, electrical, automotive, and the construction industries. These wide applications are due to its low cost, excellent thermal stability, melt mobility, spinnability, and chemical resistance (Chen et al.,

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PET/imidazolium‐based OMMT nanocomposites via in situ polymerization: Morphological, thermal, and nonisothermal crystallization studies

Cited by 24 publications

References 34 publications

Morphology and properties of polymer/organoclay nanocomposites based on poly(ethylene terephthalate) and sulfopolyester blends

Morphology and properties of polymer/organoclay nanocomposites based on poly(ethylene terephthalate) and sulfopolyester blends

Toughening of recycled poly(ethylene terephthalate) with clay‐compatibilized rubber phase

In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays

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