Intercalation and viscoelasticity of poly(ether-block-amide) copolymer/montmorillonite nanocomposites: Effect of surfactant

Yang, I‐Kuan; Tsai, Pei-Hsuan

doi:10.1016/j.polymer.2006.04.065

Cited by 46 publications

(31 citation statements)

References 37 publications

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“…3. According to results, the interlayer spacings of Nanomer I.34TCN and Nanomer I.30P prior to compounding were 2.00 and 2.08 nm, respectively, and somewhat lower than the values given by the nanoclay supplier [15] but in good agreement with previously published physical data on the clays [20,21].…”

Section: Nanoclay Dispersionsupporting

confidence: 89%

Characterization of twin‐screw‐extruder‐compounded polycarbonate nanoclay composites

Nevalainen

Vuorinen

Villman

et al. 2008

Polymer Engineering & Sci

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Polycarbonate nanocomposites were prepared by melt processing from two surface-modified montmorillonite organoclays. The intercalation spacing and degree of the dispersion were characterized with wide-angle X-ray diffraction and transmission electron microscopy, respectively. The polycarbonate nancomposites showed rather good dispersion of nanoclay, with a mixture of exfoliated, intercalated, and confined morphology. The effect of nanoclay on the mechanical response of specimens subjected to tensile and impact loading was investigated. Results demonstrated that nanocomposites based on nanoclay possess increased Young's modulus and yield strength. However, their ductility upon tensile loading is significantly affected. A transition from ductile to brittle deformation occurs at studied clay loadings. Notched impact strength experiments supported this, showing that impact strength decreases significantly as nanoclay content increases from 1 to 5 wt%, regardless how the nanoclay surface was modified. Thermal analysis demonstrated that addition of nanoclay leads to decreased thermal stability of polycarbonate suggesting, enhanced dynamics of polymer chains. Finally, the tribological properties of selected specimens were evaluated using a pin-on-disc, and the effect of nanoclay fillers on tribological properties is discussed. POLYM. ENG.

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Section: Nanoclay Dispersionsupporting

confidence: 89%

Characterization of twin‐screw‐extruder‐compounded polycarbonate nanoclay composites

Nevalainen

Vuorinen

Villman

et al. 2008

Polymer Engineering & Sci

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“…The cryoscopic effect was also evidenced for the crystallization (17°C decrease). The temperature lags were not as high as the ones reported for PA6 [22,23] (till 60°C) on the one hand because the matrix is a copolymer (PA12 blocks are reported to stand for 88 wt% [46] or for 73 mol% [40] of the copolymer) and on the other hand because of the lower H-bonding concentration among PA12 compared with PA6. Nevertheless, the HPDSC results confirm that water and the polyamide part of PEBA behave as a single molten phase in the extrusion conditions.…”

Section: Analysis Of Peba-water Solubilitymentioning

confidence: 58%

“…In the latter phase, H-bonds make it possible for water to solvate the polyamide blocks [18]. HPDSC measurements were also performed at different pressures (20,40,60 and 80 bar, not reported here). Whatever the pressure, the melting point of the PEBA/water phase appears at the same temperature (153.5°C).…”

Section: Analysis Of Peba-water Solubilitymentioning

confidence: 99%

“…Indeed, various polyethers were used to successfully prepare nanocomposites filled with pristine montmorillonite (NaMMT) [35,36] and the efficiency of PEO as intercalant for the preparation of apolar polymers/ NaMMT has been demonstrated [37,38]. Because of the above mentioned affinities for montmorillonite offered by polyethers and polyamides, trials have been successfully undertaken to prepare polyether-block-amide (PEBA)/clay nanocomposites, varying polyamide and polyether blocks [39][40][41]. However, only organically modified clay has been used and compounding of PEBA/pristine clay nanocomposites has never been reported so far to our knowledge.…”

Section: Introductionmentioning

confidence: 99%

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Efficient one-step melt-compounding of copolyetheramide/pristine clay nanocomposites using water-injection as intercalating/exfoliating aid

Touchaleaume¹,

Soulestin²,

Sclavons³

et al. 2011

Express Polym. Lett.

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Abstract. Polyether-block-amide (PEBA) /clay nanocomposites were prepared water-assisted by twin-screw extrusion. Both organomodified and pristine (i.e. purified but non-modified) montmorillonite clays were used. A high-pressure differential scanning calorimetry analysis carried out in the processing conditions demonstrated that PEBA/water blend exhibits some miscibility and that amide blocks and water behave as a single phase. In addition to a significant decrease of the melting temperature, water injected into the melt plays a key role among the filler dispersion and prevents the matrix from degradation during melt-extrusion. This process enables the compounding of pristine clay-based nanocomposites whose dispersion state is high enough for the resulting mechanical performances in tension to be at least equivalent to what is reached with organomodified clay. Effects of the nanofiller dispersion onto the macromolecules' mobility are detailed and fracture mechanisms are identified for the various structures.

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“…Before blending, the organoclay was vacuum-dried at 808C for 24 h [27]. The EVA/SMR L nanocomposites were prepared by melt mixing in a Haake Rheomix Polydrive R 600/610 apparatus at 1208C and a rotor speed of 50 rpm.…”

Section: Preparation Of Nanocompositesmentioning

confidence: 99%

Effect of electron beam irradiation on the properties of ethylene‐(vinyl acetate) copolymer/natural rubber/organoclay nanocomposites

Munusamy¹,

Ismail²,

Mariatti³

et al. 2009

Vinyl Additive Technology

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The effects of electron beam (EB) irradiation on the morphology, crosslink density, and tensile properties of EVA/SMR L (Standard Malaysian Rubber)/organoclay nanocomposites prepared by a melt-blending technique were investigated. All the samples were irradiated by using a 3.0-MeV EB apparatus with doses ranging from 50 to 200 kGy. Organoclay loading was varied from 0 to 10 phr (parts by weight per hundred parts of resin). X-ray diffraction results and transmission electron microscopy images proved that the dispersion of organoclay in the nanocomposites was slightly improved by EB irradiation. The gel fraction yield for the nanocomposites increased with irradiation dose but decreased with organoclay loading. However, at 200 kGy, the gel fraction yield was almost the same at all organoclay loadings. Tensile strength and stress at 100% elongation increased proportionally with the irradiation dose. Elongation at break of the nanocomposites increased up to 100 kGy but then decreased at higher irradiation doses. The intercalation and exfoliation of the organoclay, the barrier effect, and the Hofmann degradation of the modification agent are the three major factors leading to the improvement of the properties of the irradiated nanocomposites. J. VINYL

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Intercalation and viscoelasticity of poly(ether-block-amide) copolymer/montmorillonite nanocomposites: Effect of surfactant

Cited by 46 publications

References 37 publications

Characterization of twin‐screw‐extruder‐compounded polycarbonate nanoclay composites

Characterization of twin‐screw‐extruder‐compounded polycarbonate nanoclay composites

Efficient one-step melt-compounding of copolyetheramide/pristine clay nanocomposites using water-injection as intercalating/exfoliating aid

Effect of electron beam irradiation on the properties of ethylene‐(vinyl acetate) copolymer/natural rubber/organoclay nanocomposites

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