Dispersion of layered double hydroxides in poly(ethylene terephthalate) by in situ polymerization and mechanical grinding

Martínez-Gallegos, Sonia; Herrero, Miguel A.; Barriga, C.; Labajos, F.M.; Rives, V.

doi:10.1016/j.clay.2009.04.007

Cited by 30 publications

(15 citation statements)

References 37 publications

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“…Lee and coworkers [18] prepared PET/LDH nanocomposites using anionic surfactants intercalated LDHs by a direct melt compounding method. Rives and coworkers prepared PET/LDH nanocomposites through a microwave [19] and mechanical grinding method [20]. Dodecylsulfate intercalated LDHs were used to enhance the compatibility between the PET polymer and the LDHs.…”

Section: +mentioning

confidence: 99%

Preparation of poly(ethylene terephthalate)/layered double hydroxide nanocomposites by in-situ polymerization and their thermal property

Cui¹,

Jiao²,

Zhao³

et al. 2012

Express Polym. Lett.

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Abstract. Terephthalate (TA) intercalated layered double hydroxides (LDHs) were synthesized using hydroxides as raw materials, and poly(ethylene terephthalate) (PET)/LDH nanocomposites with different contents of TA intercalated LDHs were prepared by in-situ polymerization. The structure, morphology and thermal property of PET/LDH nanocomposites were investigated. The TA intercalated LDHs were partially exfoliated and well dispersed in PET matrix. The PET/LDH nanocomposites exhibit enhanced thermal stability relative to pure PET, confirmed by the thermogravimetric analysis results. The results of differential scanning calorimetry suggest that LDH nanoparticles could effectively promote the nucleation and crystallization of PET.

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Section: +mentioning

confidence: 99%

Preparation of poly(ethylene terephthalate)/layered double hydroxide nanocomposites by in-situ polymerization and their thermal property

Cui¹,

Jiao²,

Zhao³

et al. 2012

Express Polym. Lett.

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“…Due to their high aspect ratio, their layered feature extended to the nanoscale and their hydroxylated surface, LDH are also particularly interesting for fabricating polymer nanocomposites [20–23]. To favor the dispersion of LDH platelets into polymers, hybrid surfactant (usually dodecyl sulphate)-intercalated LDH were prepared and incorporated into polymer matrices such as polyethylene [24], polypropylene [25], poly(methyl methacrylate) [26], elastomers [27], epoxy polymers [28], poly(ε-caprolactone) [29], polyesters [30], polyurethane [31] and polyimide [21]. Alternatively, Leroux et al described the preparation of a hybrid LDH phase intercalated by an anionic polymerizable surfactant acting further as an anchor that compatibilizes the inorganic LDH with the polymer matrix during the polymerization [32].…”

Section: Introductionmentioning

confidence: 99%

Intercalation and structural aspects of macroRAFT agents into MgAl layered double hydroxides

Kostadinova

Pereira

Lansalot

et al. 2016

Beilstein J. Nanotechnol.

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Increasing attention has been devoted to the design of layered double hydroxide (LDH)-based hybrid materials. In this work, we demonstrate the intercalation by anion exchange process of poly(acrylic acid) (PAA) and three different hydrophilic random copolymers of acrylic acid (AA) and n-butyl acrylate (BA) with molar masses ranging from 2000 to 4200 g mol−1 synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization, into LDH containing magnesium(II) and aluminium(III) intralayer cations and nitrates as counterions (MgAl-NO3 LDH). At basic pH, the copolymer chains (macroRAFT agents) carry negative charges which allowed the establishment of electrostatic interactions with the LDH interlayer and their intercalation. The resulting hybrid macroRAFT/LDH materials displayed an expanded interlamellar domain compared to pristine MgAl-NO3 LDH from 1.36 nm to 2.33 nm. Depending on the nature of the units involved into the macroRAFT copolymer (only AA or AA and BA), the intercalation led to monolayer or bilayer arrangements within the interlayer space. The macroRAFT intercalation and the molecular structure of the hybrid phases were further characterized by Fourier transform infrared (FTIR) and solid-state 13C, 1H and 27Al nuclear magnetic resonance (NMR) spectroscopies to get a better description of the local structure.

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“…To prepare clay/PET nanocomposites using in situ polymerization, clay is first swelled by intercalation of the monomer into silicate layers, after which an in situ interlayer polymerization is undertaken ( Chen et al, 2009;Kim, 2007;Martinez-Gallegos et al, 2009;Yin et al, 2009aYin et al, , 2009b. 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).…”

Section: Introductionmentioning

confidence: 99%

“…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: 99%

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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Dispersion of layered double hydroxides in poly(ethylene terephthalate) by in situ polymerization and mechanical grinding

Cited by 30 publications

References 37 publications

Preparation of poly(ethylene terephthalate)/layered double hydroxide nanocomposites by in-situ polymerization and their thermal property

Preparation of poly(ethylene terephthalate)/layered double hydroxide nanocomposites by in-situ polymerization and their thermal property

Intercalation and structural aspects of macroRAFT agents into MgAl layered double hydroxides

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

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