Vulcanization behavior of NBR with organically modified clay

2011 ◽  
Vol 44 (3) ◽  
pp. 263-272 ◽  
Author(s):  
Fabiula D. B. de Sousa ◽  
Carlos H. Scuracchio
Keyword(s):  
Butadiene Rubber ◽  
Modified Clay ◽  
Nitrile Butadiene Rubber ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified ◽  
Kinetics Of ◽  
Kinetics Of Vulcanization

The rheometric measurements were used to study the kinetics of vulcanization of the nanocomposites nitrile butadiene rubber (NBR)/organically modified montmorillonite in different concentrations. The presence of clay has modified the rheometric properties of rubber. However the Ea values were not significantly modified with the presence of nanofiller.

Comparison Studies on Nitrile-Butadiene Rubber Nanocomposites Depending on the Organically Modified Montmorillonites

2007 ◽  
Vol 119 ◽  
pp. 83-86
Author(s):  
Ji Young Mang ◽  
Dong Hoon Choi ◽  
Mi Jeong Han
Keyword(s):  
Butadiene Rubber ◽  
Organic Modifiers ◽  
Hot Press ◽  
X Ray Diffraction ◽  
Ammonium Ions ◽  
Chemical Structures ◽  
Nitrile Butadiene Rubber ◽  
Melt Compounding ◽  
Modified Montmorillonite ◽  
Organically Modified

A various organic modifiers depending on the substituents of ammonium ions were synthesized and used to prepare organically modified montmorillonite (OMMT). Nitrile-butadiene rubber (NBR)/OMMT nanocomposites could be obtained using melt-compounding followed by hot-press vulcanization. d-Spacings of OMMT were changed as the chemical structures of modifiers were varied. X-ray diffraction (XRD) and tensile measurements of NBR nanocomposites revealed that the structures of organic modifiers affect the properties of NBR nanocomposites after vulcanization. Long alkyl chain of OMMT induced higher interaction between NBR and OMMT, resulting in higher tensile strength, Young’s modulus, and hardness of NBR/OMMT nanocomposites.

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

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