Role of silane concentration on the structural characteristics and properties of epoxy-/silane-modified montmorillonite clay nanocomposites

2016 ◽  
Vol 49 (8) ◽  
pp. 665-683 ◽  
Author(s):  
Sung Hun Ryu ◽  
M Jeevan Kumar Reddy ◽  
AM Shanmugharaj
e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Sugata Chakraborty ◽  
Saptrashi Kar ◽  
Saikat Dasgupta ◽  
Rabindra Mukhopadhyay ◽  
Samar Bandyopadhyay

AbstractPresent study describes the preparation and characterization of crystal violet modified-montmorillonite clay nanocomposites by latex blending technique. Coagulation of the latex-clay slurry produced nanocomposites master batch. The master batch was compounded with Styrene Butadiene rubber (SBR). WAXD and TEM provided the evidences of formation of nanocomposite. Remarkable improvements in the mechanical properties were found by addition of small amount of modified clay.


2012 ◽  
Vol 714 ◽  
pp. 13-20 ◽  
Author(s):  
K. Anoukou ◽  
Fahmi Zaïri ◽  
M. Naït-Abdelaziz ◽  
Ali Zaoui ◽  
J.M. Gloaguen

A micromechanics-based approach using a self-consistent scheme based on the double-inclusion model is adopted to develop a pertinent model for describing the viscoelastic response of polymer/clay nanocomposites. The relationship between the intercalated nanostructure and the effective nanocomposite stiffness is constructed using an equivalent stiffness method in which the clay stacks are replaced by homogeneous nanoparticles with predetermined equivalent anisotropic stiffness. The capabilities of the proposed micromechanics-based model are checked by comparing with the experimental viscoelastic (glassy to rubbery) response of two polyamide-6-based nanocomposite systems reinforced with a modified montmorillonite clay (Cloisite 30B) and an unmodified sodium montmorillonite clay (Cloisite Na+), favoring, respectively, exfoliation and intercalation states.


INEOS OPEN ◽  
2020 ◽  
Vol 3 ◽  
Author(s):  
S. A. Sorokina ◽  
◽  
Yu. Yu. Stroilova ◽  
V. I. Muronets ◽  
Z. B. Shifrina ◽  
...  

Among the compounds able to efficiently inhibit the amyloid aggregation of proteins and decompose the amyloid aggregates that cause neurodegenerative diseases, of particular interest are dendrimers, which represent individual macromolecules with the hypercrosslinked architectures and given molecular parameters. This short review outlines the peculiarities of the antiamyloid activity of dendrimers and discusses the effect of dendrimer structures and external factors on their antiamyloid properties. The potential of application of dendrimers in further investigations on the aggregation processes of amyloid proteins as the compounds that exhibit the remarkable antiamyloid activity is evaluated.


2020 ◽  
Vol 15 (2) ◽  
pp. 54
Author(s):  
А. И. Кольба ◽  
Н. В. Кольба

The article describes the structural characteristics of the urban communities of the city of Krasnodar and the related features that impact their participation in urban conflicts. This issue is considered in a number of scientific publications, but there is a need to expand the empirical base of such studies. On the base of expert interviews conducted with both city activists, their counterparty (representatives of the municipal government) and external observers (journalists), the parameters of urban communities functioning in the process of their interaction with other conflict actors are revealed. The communities characteristics such as the predominantly territorial principle of formation, the overlap of online and offline communications in their activities, the presence of a “core” with a relatively low number of permanent participants and others are determined. Their activities are dominated by neighborly and civilian models of participation in conflicts. The possibilities of realizing one’s own interests through political interactions (participation in elections, the activities of representative bodies of power, political parties) are not yet sufficiently understood. Urban communities, as a rule, operate within the framework of conventional forms of participation in solving urgent problems, although in some cases it is possible to use confrontational methods, in particular, protest ones. In this regard, the most often used compromise, with the desire for cooperation, a strategy of behavior in interaction with opponents. The limited activating role of conflicts in the activities of communities has been established. The weak manifestation of the civil and especially political component in their activities determines the preservation of a low level of political subjectivity. This factor restrains the growth of urban communities resources and the possibility of applying competitive strategies in interaction with city government and business.


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