Organically modified montmorillonites in UV curable urethane acrylate films

Uhl, Fawn M.; Davuluri, Siva Prashanth; Wong, Shing Chung Josh; Webster, Dean C.

doi:10.1016/j.polymer.2004.07.001

Cited by 108 publications

(58 citation statements)

References 28 publications

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“…This intercalation is an efficient way to increase the material surface hydrophobicity of Na-MMT which is a fundamental requirement for good compatibility between the polymer matrix and the Na-MMT surface [9]. Surfactant method gives a better increase in the d-spacing of the nanoclay compared to ion exchange reaction by alkyl ammonium salts where in the studies conducted by Uhl et al (2004) [10], cetyltrimethylammonium bromide (CTMA) increases the nanoclay galleries only by 0.5 nm while the surfactant method used in this study could increase the nanoclay layer by 0.64 nm.…”

Section: Characterization Of Nanoclaymentioning

confidence: 99%

Surface Modification of Nanoclay for the Synthesis of Polycaprolactone (PCL) – Clay Nanocomposite

Yusoh

Kumaran

Ismail

2018

MATEC Web of Conferences

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Abstract. This paper presents a new modification method to modify the surface of nanoclay (Na-MMT) to increase its d-spacing using Aminopropylisooctyl Polyhedral Oligomeric Silsesquioxane (AP-POSS) and the fabrication of Polycaprolactone (PCL) nanocomposite through solution intercalation technique. The structure and morphology of pure nanoclay, modified nanoclay (POSS-MMT) and the PCL nanocomposite were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Field Emission Scanning Electron Microscopy (FESEM). XRD revealed that the d-spacing of the POSS-MMT is increased by 0.64 nm as compared to pure nanoclay. FTIR and FESEM results also showed that AP-POSS were well dispersed and intercalated throughout the interlayer space of Na-MMT. An exfoliated structure was also observed for PCL/POSS-MMT nanocomposite. Thermal properties of the nanocomposite were investigated using Thermal Gravimetry Analysis (TGA) which recorded highest degradation temperature for PCL/POSS-MMT 1% nanocomposite which is 394.1˚C at 50% weight loss (T50%) but a decrease in degradation temperature when POSS-MMT content is increased and Differential Scanning Calorimetry (DSC) analysis which showed highest melting and crystallization temperature for PCL/POSS-MMT 5% nanocomposite which is 56.6˚C and 32.7˚C respectively whereas a decrease in degree of crystallinity for PCL/POSS-MMT nanocomposite as compared to PCL/Na-MMT nanocomposite. This study affords an efficient modification method to obtain organoclay with larger interlayer d-spacing to enhance the properties of polymer nanocomposite.

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Section: Characterization Of Nanoclaymentioning

confidence: 99%

Surface Modification of Nanoclay for the Synthesis of Polycaprolactone (PCL) – Clay Nanocomposite

Yusoh

Kumaran

Ismail

2018

MATEC Web of Conferences

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“…Figure 5 shows the DCS thermograms of POBUA nanocomposites, it reveals that the glass transition temperature of POBUA was significantly elevated to higher values in the nanocomposites [12], from 40.5°C in the pure POBUA to 61.8°C in the nanocomposite sample containing 5% ODA-MMT. The higher Tg of the nanocomposites open the possibility of more applications, which may involve higher processing temperature.…”

Section: Differential Scanning Calorimetry Analysis (Dsc)mentioning

confidence: 99%

“…al reported that the polyurethane acrylate nanocomposites were obtained with remarkable improvement in the optical transparency, thermal stability and dynamic mechanical analysis [11]. This improvement in the polyurethane acrylate properties was found to be depending on the degree of exfoliation of the clay platelets in the polymer matrix [12].…”

Section: Introductionmentioning

confidence: 98%

Thermal and mechanical properties of palm oil-based polyurethane acrylate/clay nanocomposites prepared by in-situ intercalative method and electron beam radiation

Salih

Ahmad

Ibrahim

et al. 2014

AIP Conference Proceedings

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“…The effects of organoclays on the properties of PU were studied [1,3,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. PU were prepared by the following procedures: (i) distribution of clay in polyol with a subsequent reaction with diisocyanate; (ii) interaction of PU with clay in organic solvent with a subsequent evaporation of solvent; (iii) reaction of diisocyanate with hydroxyalkyl groups of organic modifier in the clay with a subsequent reaction with polyol.…”

Section: Pu-organoclay Compositesmentioning

confidence: 99%

Polyurethane Nanocomposites

Khudyakov¹,

Zopf²,

Turro

2009

Designed Monomers and Polymers

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This review describes the present state of science and technology of photopolymerizable (UV-curable) polyurethane (PU) nanocomposites which include nanosilica and organically-modified clay (organoclay). A number of documented improvements of properties of PU nanocomposites compared to the pristine PU are presented. Many data on the structure and properties of PU nanocomposites were obtained not only for UV-cured urethane acrylate oligomers, but also for nanocomposites produced in the dark reactions. These data are critically reviewed. There is an expectation in the field of dramatic improvement of properties of PU nanocomposites under low loading (1-5 wt%) of organoclay.

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Organically modified montmorillonites in UV curable urethane acrylate films

Cited by 108 publications

References 28 publications

Surface Modification of Nanoclay for the Synthesis of Polycaprolactone (PCL) – Clay Nanocomposite

Surface Modification of Nanoclay for the Synthesis of Polycaprolactone (PCL) – Clay Nanocomposite

Thermal and mechanical properties of palm oil-based polyurethane acrylate/clay nanocomposites prepared by in-situ intercalative method and electron beam radiation

Polyurethane Nanocomposites

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