Effect of accelerated aging on the cross-link density of medical grade silicones

2016 ◽  
Vol 27 (5) ◽  
pp. 437-449
Author(s):  
Aziza Mahomed ◽  
Negin Bagheri Pormehr
Keyword(s):  
Accelerated Aging ◽  
Cross Link ◽  
Link Density ◽  
Cross Link Density ◽  
The Cross ◽  
Medical Grade

Mechanical behavior of poly(methyl methacrylate)-based ionogels

Soft Matter ◽  
2014 ◽  
Vol 10 (40) ◽  
pp. 7993-8000 ◽  
Author(s):  
Mingyu Li ◽  
Jianyu Li ◽  
Hui Na ◽  
Joost J. Vlassak
Keyword(s):  
Methyl Methacrylate ◽  
Mechanical Behavior ◽  
Fracture Energy ◽  
Cross Link ◽  
Poly Methyl Methacrylate ◽  
Link Density ◽  
Cross Link Density ◽  
The Cross ◽  
The Ideal

We demonstrate that the fracture energy of ionogels correlates inversely with the cross-link density. The behavior of ionogels is well captured by the ideal elastomeric gel model.

scholarly journals Magnetic composites based on NR and strontium ferrite

2019 ◽  
Vol 12 (1) ◽  
pp. 63-69
Author(s):  
Ján Kruželák ◽  
Andrea Kvasničáková ◽  
Rastislav Dosoudil ◽  
Ivan Hudec
Keyword(s):  
Carbon Black ◽  
Strontium Ferrite ◽  
Rubber Matrix ◽  
Cross Link ◽  
Magnetic Composites ◽  
Link Density ◽  
Cross Links ◽  
Cross Link Density ◽  
The Cross ◽  
Thermo Physical Properties

Abstract Two types of composites based on natural rubber (NR) and strontium ferrite were tested in this study. Composites of the first type were prepared by incorporation of strontium ferrite in the concentration range ranging from 0 to 100 phr (parts per hundred rubber) into pure NR based rubber matrix, while with those of the second type, strontium ferrite was dosed in the same concentration level into NR based rubber batch with constant amount of carbon black — 25 phr. For rubber matrices cross-linking, a standard sulfur based curing system was used. This work is focused on the effect of magnetic filler content on physico-mechanical, magnetic and thermo-physical properties of composite materials. Subsequently, the cross-link density and the structure of the formed sulfidic cross-links were examined. The results showed that the cross-link density of both types of composites increased with the increasing content of magnetic filler, while the structure of the sulfidic cross-links was almost not influenced by the amount of strontium ferrite. Tensile strength of rubber composites with pure rubber matrix was slightly improved by the incorporation of ferrite, while in case of composites based on a carbon black batch, the incorporation of magnetic filler resulted in the decrease of this characteristic. The presence of magnetic filler in both types of composites leads to a significant increase of the remanent magnetic induction.

scholarly journals Dependence of the swelling behavior of a pH-responsive PEG-modified nanogel on the cross-link density

2011 ◽  
Vol 44 (3) ◽  
pp. 240-244 ◽  
Author(s):  
Goshu Tamura ◽  
Yuya Shinohara ◽  
Atsushi Tamura ◽  
Yusuke Sanada ◽  
Motoi Oishi ◽  
...  
Keyword(s):  
Swelling Behavior ◽  
Ph Responsive ◽  
Cross Link ◽  
Link Density ◽  
Cross Link Density ◽  
The Cross

scholarly journals Influence of the chemical structure of cross-linking agents on properties of thermally reversible networks

2016 ◽  
Vol 88 (12) ◽  
pp. 1103-1116 ◽  
Author(s):  
Lorenzo Massimo Polgar ◽  
Robin R.J. Cerpentier ◽  
Gijs H. Vermeij ◽  
Francesco Picchioni ◽  
Martin van Duin
Keyword(s):  
Chemical Structure ◽  
Chemical Conversion ◽  
Rubber Matrix ◽  
Cross Linking ◽  
Cross Link ◽  
Molar Amount ◽  
Link Density ◽  
Cross Link Density ◽  
Cross Linker ◽  
The Cross

Abstract It is well-known that the properties of cross-linked rubbers are strongly affected by the cross-link density. In this work it is shown that for thermoreversibly cross-linked elastomers, the type and length of the cross-linker also have a significant effect. A homologous series of diamine and bismaleimide cross-linkers was used to cross-link maleic-anhydride-grafted EPM irreversibly and furan-modified EPM thermoreversibly, respectively. Bismaleimide cross-linkers with a polarity close to that of EPM and a relatively low melting point have a better solubility in the rubber matrix, which results in higher chemical conversion and, thus, higher cross-link densities at the same molar amount of cross-linker. Samples cross-linked with different spacers (aromatic and aliphatic spacers of different lengths) were compared at the same cross-link density to interpret the effects on the material properties. The rigid character of the short aliphatic and the aromatic cross-linkers accounts for the observed increase in hardness, Young´s modulus and tensile strength with respect to the longer, more flexible aliphatic cross-linkers. In conclusion, the structure of the cross-linking agent can be considered as an alternative variable in tuning the rubber properties, especially for thermoreversibly cross-linked rubber.

Changes in the cross-link density of Paris Basin Toarcian kerogen during maturation

2002 ◽  
Vol 33 (10) ◽  
pp. 1143-1152 ◽  
Author(s):  
John W. Larsen ◽  
Harsh Parikh ◽  
Raymond Michels
Keyword(s):  
Paris Basin ◽  
Cross Link ◽  
Link Density ◽  
Cross Link Density ◽  
The Cross

Optimizing ionic conduction of poly(oxyethylene) electrolytes through controlling the cross-link density

2017 ◽  
Vol 240 ◽  
pp. 307-315 ◽  
Author(s):  
Amdou Thiam ◽  
Claire Antonelli ◽  
Cristina Iojoiu ◽  
Fannie Alloin ◽  
Jean-Yves Sanchez
Keyword(s):  
Ionic Conduction ◽  
Cross Link ◽  
Link Density ◽  
Cross Link Density ◽  
The Cross
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