Poly(3-dodecyl thiophene)-Organically modified montmorillonite clay nanocomposites: Influence of chain regioregularity and preparation condition on physical, mechanical, optical, and conductivity properties

2009 ◽  
Vol 111 (1) ◽  
pp. 155-167 ◽  
Author(s):  
Biplab K. Kuila ◽  
Arun K. Nandi
Keyword(s):  
Preparation Condition ◽  
Montmorillonite Clay ◽  
Clay Nanocomposites ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified

Exfoliated polypyrrole-organically modified montmorillonite clay nanocomposite as a potential adsorbent for Cr(VI) removal

2013 ◽  
Vol 222 ◽  
pp. 186-197 ◽  
Author(s):  
Katlego Zebedius Setshedi ◽  
Madhumita Bhaumik ◽  
Segametsi Songwane ◽  
Maurice S. Onyango ◽  
Arjun Maity
Keyword(s):  
Montmorillonite Clay ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified

EFFECT OF ORGANICALLY MODIFIED MONTMORILLONITE CLAY ON MORPHOLOGICAL, PHYSICOMECHANICAL, THERMAL STABILITY, AND WATER VAPOR TRANSMISSION RATE PROPERTIES OF BIIR-CO RUBBER NANOCOMPOSITE

2015 ◽  
Vol 88 (1) ◽  
pp. 176-196 ◽  
Author(s):  
S. Kumar ◽  
G. B. Nando ◽  
Sujith Nair ◽  
G. Unnikrishnan ◽  
A. Sreejesh ◽  
...  
Keyword(s):  
Water Vapor ◽  
Volume Fraction ◽  
Transmission Rate ◽  
Morphological Characteristics ◽  
Montmorillonite Clay ◽  
Water Vapor Transmission Rate ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Water Vapor Transmission ◽  
Organically Modified

ABSTRACT Rubber nanocomposites based on bromobutyl rubber (BIIR), polyepichlorohydrin rubber (CO), carbon black (CB), and organically modified montmorillonite clay (NC) were prepared via melt compounding technique. Effects of NC dosage on various properties of the developed BIIR-CO nanocomposites were studied. Morphological characteristics of the BIIR-CO nanocomposite revealed a good level of clay dispersion. Scanning electron microscopy analyses of the tensile fractured surfaces of the nanocomposites revealed the existence of a good interaction between NC-CB. Hybrid microstructure development between NC and CB, clay exfoliation, and improved filler dispersion in the quaternary nanocomposite significantly contributed to the overall enhancement of properties. The addition of nanoclay increases the modulus up to 54%, tear strength up to 20%, and other physicomechanical properties of the rubber nanocomposite. However, higher nanoclay dose results in the agglomeration of clay particles predominantly. An increase in the volume fraction of nanoclay platelets depreciates the thermal degradation of the BIIR-CO nanocomposites. The tortuous path offered by NC is pivotal in the significant reduction in the water vapor transmission rate (up to 30% reduction). Contact angle measurements reveal the importance of nanoclay dispersion in subsiding the surface hydrophilic nature of the nanocomposite.

scholarly journals Preparation of Polyimide-Clay Nanocomposites and Their Performance

2009 ◽  
Vol 1 (2) ◽  
pp. 326-333 ◽  
Author(s):  
S. M. M. Alam
Keyword(s):  
Tensile Modulus ◽  
Clay Nanocomposites ◽  
Gravimetric Analysis ◽  
Modified Clay ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified ◽  
Layered Clay ◽  
Tetracarboxylic Dianhydride ◽  
Thermal Stability Of

A series of polyimide (PI)-organically modified clay nanocomposites were made to enhance tensile modulus, thermal stability of PI. PI was made from 3, 3', 4, 4'-biphenyl tetracarboxylic dianhydride (BPDA), p-phenylediamine (PDA).  Montmorillonite (MMT), one type of layered clay, was treated by dodecylamine salt.  XRD indicated that organically modified montmorillonite (OMMT) layers were exfoliated and dispersed into PI-film.  Tensile measurements indicated that small amount of OMMT (up to 3%) increased tensile modulus nicely.  The glass transition temperatures (Tg) of the nano-composites are higher than those of pristine PI.  Thermal gravimetric analysis (TGA) showed that nanocomposites have higher decomposition temperatures in comparison with the original PI.  Keywords: Polyimide; Organically modified clay; Nanocomposites; Dodecylamine. © 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.DOI: 10.3329/jsr.v1i2.2297

Effect of Surface Characteristics on Polystyrene/Clay Nanocomposite via Emulsion Polymerization

2006 ◽  
Vol 111 ◽  
pp. 187-190 ◽  
Author(s):  
B.J. Park ◽  
Hyoung Jin Choi
Keyword(s):  
Emulsion Polymerization ◽  
Surface Characteristics ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Transmission Electron ◽  
Organically Modified ◽  
Plate Geometry ◽  
Effect Of Surface

Polystyrene/clay nanocomposite with organically modified montmorillonite was synthesized via emulsion polymerization. Organic styrene monomer was first intercalated into intergalley of the clay hosts, followed by a typical emulsion polymerization with surfactant and initiator. To investigate the effect of clay loading, we also prepared PS/clay nanocomposites with different clay contents. Wide angle X-ray diffraction (XRD) and transmission electron microscopy (TEM) showed that the emulsion polymerization of PS in the presence of clay produces partially exfoliated and intercalated nanocomposites. In order to study their rheological properties, the melt pallets of composite materials were prepared and measured via a rotational rheometer with a parallel plate geometry.

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