Study of elastomeric polyurethane nanocomposites prepared from grafted organic–montmorillonite

Aimin, Cheng; Wu, Shishan; Jiang, Dingjun; Wu, Fang; Shen, Jing

doi:10.1007/s00396-006-1476-9

Cited by 31 publications

(24 citation statements)

References 22 publications

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“…from the bulk of the polymer matrix to the gaseous phase. 5,34 The OMMT itself contains some smaller molecules that liberated at lower temperature; more of these molecules are likely to impair the thermal stability of the nanocomposites. 35 The degradation of the TPU molecular backbone is dominant at DTG 2max .…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Preparation and characterization of thermoplastic polyurethane/organoclay nanocomposites by melt intercalation technique: Effect of nanoclay on morphology, mechanical, thermal, and rheological properties

Barick

Tripathy

2010

J of Applied Polymer Sci

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Nanocomposites based on thermoplastic polyurethane (TPU) and organically modified montmorillonite (OMMT) were prepared by melt blending. Organically modified nanoclay was added to the TPU matrix in order to study the influence of the organoclay on nanophase morphology and materials properties. The interaction between TPU matrix and nanofiller was studied by infrared spectroscopy. Morphological characterization of the nanocomposites was carried out using X-ray diffraction, transmission electron microscopy, and scanning electron microscopy techniques. The results showed that melt mixing is an effective process for dispersing OMMT throughout the TPU matrix. Nanocomposites exhibit higher mechanical and thermal properties than pristine TPU. All these properties showed an increasing trend with the increase in OMMT content. Thermogravimetric analysis revealed that incorporation of organoclay enhances the thermal stability of nanocomposites significantly. Differential scanning calorimetry was used to measure the melting point and the glass transition temperature (T g ) of soft segments, which was found to shift toward higher temperature with the inclusion of organoclays. From dynamic mechanical thermal analysis, it is seen that addition of OMMT strongly influenced the storage and loss modulus of the TPU matrix. Dynamic viscoelastic properties of the nanocomposites were explored using rubber process analyzer. V C 2010 Wiley Periodicals, Inc. J Appl Polym

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Section: Thermogravimetric Analysismentioning

confidence: 99%

Preparation and characterization of thermoplastic polyurethane/organoclay nanocomposites by melt intercalation technique: Effect of nanoclay on morphology, mechanical, thermal, and rheological properties

Barick

Tripathy

2010

J of Applied Polymer Sci

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“…The FTIR spectrum of the nanocomposite (Figure 3c) shows the absence of this peak at 3624.96 cm −1 , indicating that these structural -OH groups which exist on the surface of the silicate layers could be reacted with the -NCO groups of the polymer chains, but this occurs to a small extent. [25,26] …”

Section: Thermogravimetric Analysismentioning

confidence: 98%

Studies of Particle Dispersion in Elastomeric Polyurethane/Organically Modified Montmorillonite Nanocomposites

Dimitry

Abdeen

Ismail

et al. 2011

International Journal of Green Nanotechnology

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Elastomeric polyurethane (PU) was mixed with 1, 3, 5, 7, and 10 wt% of Cloisite 20A to obtain PU-based nanocomposites. The thermal stabilities of the obtained products were characterized by thermal analysis using a thermogravimetric analyzer (TGA), which showed that addition of 5 wt% of organoclay to the PU increased its stability, whereas thermal stabilization was less efficient at 10 wt%. The electrical conductivities of these composites were studied as a function of temperature, and it was found that the conductivity of PU was enhanced upon using 5 wt% of organoclay. The tensile strength, elongation (%), and Young's modulus were considerably enhanced upon increasing the organoclay content to 5 wt%, but were then decreased to some extent upon further increase of the nanoparticle loading to 10 wt%. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study these nanocomposite structures, and it was found that the organoclay is fully exfoliated in the PU matrix when 5 wt% of Cloisite 20A was used.

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“…The prepolymer and glycerol propoxylate/organoclay mixture were mixed to complete reaction [5,9,10]. The poly(caprolactone)/clay or the solution of organoclay was added to the solution of PU in N,N 0dimethylformamide (DMF) to complete the reaction [6][7][8][11][12][13]. The solution of organoclay was first mixed with the solution of prepolymer, and then chain extender was added to the mixture [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…3. XRD patterns of TPU/MMT (97/3) (a), TPU/MMT (95/5) (b), and TPU/MMT (93/7) composites (c).transparent and homogeneous suspension, and the MMT platelets remained suspend for long time because of dispersion of the silicate layers on the nanometer scale and strong interface interaction between the silicate layers and the TPU matrix[3,4,13,23]. The DMF suspension of the PU/ CTAB-MMT(93/7) composites separated into two parts-a pale yellow, semitransparent and homogeneous suspension and few MMT particles deposited on the bottom of the test tube.…”

mentioning

confidence: 99%

“…The DMF suspension of the PU/ CTAB-MMT(93/7) composites separated into two parts-a pale yellow, semitransparent and homogeneous suspension and few MMT particles deposited on the bottom of the test tube. This was because of aggregation of few MMT in the TPU/CTAB-MMT (93/7) composites[13,24].TEMThe dispersion state of MMT platelets in TPU/MMT and TPU/CTAB-MMT composites was displayed in Figs. 6 and 7, respectively.…”

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confidence: 99%

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Study on thermoplastic polyurethane/montmorillonite nanocomposites

Ran

Zou

et al. 2007

Polymer Composites

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The thermoplastic polyurethane/montmorillonite (TPU/MMT) nanocomposites were prepared by melt intercalation. The structure and property of the TPU/MMT nanocomposites were studied by XRD, TEM, TG, Molau test, and mechanical property measurement. The interlayer spacing between the MMT platelets in TPU/MMT nanocomposites blended for 10 and 15 min was the same. The silicate platelets were dispersed in TPU matrix on 5–15 nm scale for TPU/MMT nanocomposites. The interface interaction between the silicate layers and TPU matrix for TPU/MMT nanocomposites was strong. Compared to those of pure TPU, the tensile strength and tear strength of the TPU/MMT nanocomposites increased. The tensile strength and tear strength of the TPU/MMT nanocomposites decreased with increasing blending time because of the degradation of the TPU matrix. The thermal stability of the TPU/MMT nanocomposites was lower than that of the pure TPU in the first step, whereas in the second step, the TPU/MMT nanocomposites showed higher thermal stability. POLYM. COMPOS., 2008. © 2007 Society of Plastics Engineers

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Study of elastomeric polyurethane nanocomposites prepared from grafted organic–montmorillonite

Cited by 31 publications

References 22 publications

Preparation and characterization of thermoplastic polyurethane/organoclay nanocomposites by melt intercalation technique: Effect of nanoclay on morphology, mechanical, thermal, and rheological properties

Preparation and characterization of thermoplastic polyurethane/organoclay nanocomposites by melt intercalation technique: Effect of nanoclay on morphology, mechanical, thermal, and rheological properties

Studies of Particle Dispersion in Elastomeric Polyurethane/Organically Modified Montmorillonite Nanocomposites

Study on thermoplastic polyurethane/montmorillonite nanocomposites

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