The synthesis and characterization of polyurethane/clay nanocomposites

Zhang, Xinmin; Xu, Rongjing; Wu, Zenggang; Zhou, Chixing

doi:10.1002/pi.1152

Cited by 96 publications

(72 citation statements)

References 7 publications

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“…The band observed at 521 and 461 cm -1 can be assigned to the stretching vibration of AlAOASi and bending mode of SiAOASi bond, respectively. 26 Along with the above bands, FTIR spectrum also shows numerous bands, which can be associated with various group frequencies of ACH 2 A, ACH, and AOH groups of the ammonium modifier present in the silicate clay as shown in Figure 1.…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 97%

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: Fourier Transform Infrared Spectroscopymentioning

confidence: 97%

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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“…17 PU/MMT nanocomposites have been synthesized and characterized extensively ever since they were initially synthesized with MMT, in which Na þ or Ca 2þ ions residing initially in the interlayers were exchanged with alkyl ammonium ions to expand the silicate layer spacing. 18 The effects of silicate layers on the mechanical, [19][20][21] thermal, [22][23][24] and diffusional [25][26][27] properties of PU nanocomposites have been studied in many works. If expanded MMT is used in the PU nanocomposite, the breaking strength and modulus have been reported to be enhanced as much as 600 19 and 300%, 23 respectively, and resistance to the thermal degradation was significantly increased.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of in situ polymerized segmented thermoplastic elastomeric polyurethane/layered silicate clay nanocomposites

Choi

Anandhan

Youk

et al. 2006

J of Applied Polymer Sci

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Nanocomposites based on thermoplastic elastomeric polyurethane (TPU) and layered silicate clay were prepared by in situ synthesis. The properties of nanocomposites of TPU with unmodified clay were compared with that of organically modified clay. The nanocomposites of the TPU and organomodified clay showed better dispersion and exhibited superior properties. Exfoliation of the clay layers was observed at low organoclay contents, whereas an intercalated morphology was observed at higher clay contents. As one of major purposes of this study, the effect of the silicate layers in the nanocomposites on the order-disorder transition temperature (T ODT ) of the TPU was evaluated from the intensity change of the hydrogen-bonded and free carbonyl stretching peaks and from the peak position change of the NÀ ÀH bending peak. The presence of the organoclay increased T ODT by approximately 108C, which indicated improved stability in the phase-separated domain structure. The layered silicate clay caused a tremendous improvement in the stiffness of the TPU; meanwhile, a reduction in the ultimate elongation was observed.

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“…As a result, incorporation of PHMAm into Na-Mt would be expected to increase the thermal stabilities of the PHMAm/Na-Mt3 and PHMAm/Na-Mt7 composites in comparison with pure PHMAm. This enhanced thermal stability of the PHMAm/Na-Mt composites may be given to Na-Mt acting as a barrier against heat flow (15)(16)(17)(18). …”

Section: Thermal Analysis Datamentioning

confidence: 99%

Synthesis and Characterization of Poly(N-Hydroxymethyl Acrylamide)/Na-Montmorillonite Composites

Dağ¹,

Bozkurt²,

Çeli̇k³

2017

Journal of the Turkish Chemical Society, Section A: Chemistry

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Abstract:In this study, the mixtures of N-hydroxymethyl acrylamide (HMAm) monomer and Na-Montmorillonite (Na-Mt) were polymerized in different ratios in the presence of benzoyl peroxide (Bz2O2) with in-situ radical polymerization to prepare poly(Nhydroxymethyl acrylamide) (PHMAm)/Na-Mt composites. Purified Na-Mt, and newly prepared composites were characterized with Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermal analysis (TGA/DTA) techniques. The moisture retention, water uptake, adsorptive properties of the composites was also searched. The XRD patterns demonstrated that the PHMAm matrix intercalated into Na-Mt layers. The PHMAm/Na-Mt composites had much better thermal stability than the pure PHMAm.

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The synthesis and characterization of polyurethane/clay nanocomposites

Cited by 96 publications

References 7 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

Synthesis and characterization of in situ polymerized segmented thermoplastic elastomeric polyurethane/layered silicate clay nanocomposites

Synthesis and Characterization of Poly(N-Hydroxymethyl Acrylamide)/Na-Montmorillonite Composites

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