Study on Bound Rubber in Silicone Rubber Filled with Modified Ultrafine Mineral Powder

2000 ◽  
Vol 73 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Jihuai Wu ◽  
Zhen Shen ◽  
Donghong Hu ◽  
Jinling Huang ◽  
Naisheng Chen
Keyword(s):  
Silicone Rubber ◽  
Measurement Method ◽  
Chemical Interaction ◽  
Rubber Matrix ◽  
Main Role ◽  
Mineral Filler ◽  
Organic Base ◽  
Rubber Content ◽  
Bound Rubber ◽  
Mineral Powder

Abstract The bound rubber measurement method was improved by ethylenediamine (NH2-CH2-CH2-NH2) replacing ammonia (NH3) as the basic agent. Using the new method, the influence of organic base on bound rubber content was investigated, the relation between bound rubber content and the mechanical properties of the silicone rubber filled with modified ultrafine mineral powder was studied, and the interaction between silicone rubber matrix and mineral filler was discussed. As a result, it is suggested that chemical interaction plays the main role in the bound rubber of silicone filled with modified ultrafine mineral powder.

Chemical Interaction between Carbon Black and Elastomers — Crosslinking of Chlorosulfonated Polyethylene by Carbon Black

1994 ◽  
Vol 67 (4) ◽  
pp. 662-671 ◽  
Author(s):  
A. Roychoudhury ◽  
S. K. De ◽  
P. P. De ◽  
J. A. Ayala ◽  
G. A. Joyce
Keyword(s):  
Carbon Black ◽  
Elevated Temperatures ◽  
Chemical Interaction ◽  
Surface Oxidation ◽  
Rubber Content ◽  
Chlorosulfonated Polyethylene ◽  
Surface Sites ◽  
Bound Rubber ◽  
Thermometric Titration ◽  
Oxidized Carbon

Abstract Surface oxidation of a carbon black leads to an increased elastomer-filler bonding between the chlorosulfonated polyethylene and the carbon black. The increased interaction appears to be related to the increased concentration and reactivity of the oxygen containing sites in the oxidized carbon black, as deduced from the moisture adsorption and thermometric titration results. The bound rubber content is substantially higher for the oxidized carbon black. The reactive surface sites of the carbon black also promote the crosslinking of the elastomer at elevated temperatures.

Interactions between Surface Treated Ultrafine Mineral Filler and Silicone Rubber Matrix

2001 ◽  
Vol 9 (3) ◽  
pp. 169-174 ◽  
Author(s):  
Jihuai Wu ◽  
Zhen Shen ◽  
Congrong Wei ◽  
Yike Chen ◽  
Donghong Hu
Keyword(s):  
Silicone Rubber ◽  
Rubber Matrix ◽  
Mineral Filler

Preparation of modified ultra-fine mineral powder and interaction between mineral filler and silicone rubber

2003 ◽  
Vol 137 (1-3) ◽  
pp. 40-44 ◽  
Author(s):  
Jihuai Wu ◽  
Jinling Huang ◽  
Naisheng Chen ◽  
Congrong Wei ◽  
Yike Chen
Keyword(s):  
Silicone Rubber ◽  
Mineral Filler ◽  
Mineral Powder

Modelling and experimental characterisation of a compressional adaptive magnetorheological elastomer isolator

2021 ◽  
pp. 107754632110253
Author(s):  
Emiliano Rustighi ◽  
Diego F Ledezma-Ramirez ◽  
Pablo E Tapia-Gonzalez ◽  
Neil Ferguson ◽  
Azrul Zakaria
Keyword(s):  
Magnetic Field ◽  
Silicone Rubber ◽  
Magnetic Interaction ◽  
Iron Particle ◽  
Material Model ◽  
Rubber Matrix ◽  
Magnetorheological Elastomer ◽  
Volume Percentage ◽  
Shock Absorbers ◽  
Percent Concentration

This article proposes a simple physical-based model to describe and predict the performance of axially compressed magnetorheological elastomer cylinders used as vibration and shock absorbers. The model describes the magnetorheological elastomer macroscopic stiffness changes because of an externally applied magnetic field from a microscopic composite cell of silicone rubber and carbonyl iron particle. Despite neglecting the material hyperelasticity, anisotropy and adjacent magnetic interaction, the model describes effectively the effect of the magnetic field on the macroscopic modulus of elasticity. The changes in the mechanical properties with the induced magnetic field are measured on samples of different particle concentration based on volume percentage, that is, 10 and 30 percent concentration of iron particles in a silicone rubber matrix. The manufacturing process of the samples is detailed, as well as the experimental validation of the effective stiffness change under a magnetic field in terms of transmissibility and mobility testing. However, the prediction seems to be limited by the linear elastic material model. Predictions and measurements are compared, showing that the model is capable of predicting the tunability of the dynamic/shock absorber and that the proposed devices have a possible application in the reduction of mechanical vibrations.

EFFECTS OF SILANE COUPLING AGENTS ON STRUCTURE AND PROPERTIES OF SILICA-FILLED SILICONE RUBBER/STYRENE BUTADIENE RUBBER COMPOSITES

2018 ◽  
Vol 91 (2) ◽  
pp. 453-468 ◽  
Author(s):  
Hong-Yuan Ren ◽  
Zheng Sun ◽  
Li-Qun Zhang ◽  
You-Ping Wu ◽  
Qiang Huang ◽  
...  
Keyword(s):  
Styrene Butadiene Rubber ◽  
Coupling Agents ◽  
Butadiene Rubber ◽  
Structure And Properties ◽  
Silane Coupling Agents ◽  
Rubber Content ◽  
Bound Rubber ◽  
Silane Coupling ◽  
Styrene Butadiene ◽  
Rubber Filler

ABSTRACT Two silane coupling agents, bis-(γ-triethoxysilylpropyl)-tetrasulfide (Si69) and vinyltriethoxysilane (A151), were selected to investigate their effects on structure and properties of silica-filled methyl vinyl silicone rubber (VMQ)/emulsion styrene butadiene rubber (ESBR) composites. The filler–rubber interactions were investigated via bound rubber content and solid-state 1H low-field nuclear magnetic resonance (NMR) spectroscopy, and the mass ratio of VMQ and ESBR in the rubber–filler gel was investigated by thermogravimetric analysis (TGA). The results revealed that VMQ showed a better compatibility with silica than ESBR. Compared with the A151 composite, the composite with Si69 showed the higher content of ESBR in rubber–filler gel, which resulted in the higher bound rubber content and the weaker Payne effect, and it also exhibited higher tensile strength, higher tear strength, better wear resistance, and lower hardness. However, the presence of Si69 reduced the crosslink efficiency of ESBR and completely inhibited the crosslinking of VMQ, which caused the composite to show higher tan δ value at 60 °C than the A151 composite.

Optimisation of the Ceramic Phase for Ceramizable Silicone Rubber Based Composites

2010 ◽  
Vol 66 ◽  
pp. 162-167 ◽  
Author(s):  
Zbigniew Pędzich ◽  
Jan Dul
Keyword(s):  
Silicone Rubber ◽  
Fire Hazard ◽  
Rubber Matrix ◽  
Ceramic Phase

Paper describes the experiment on manufacturing of composite basing on silicone rubber matrix filled with silica binder and kaolin and also glassy fillers. Such material is oriented on applications connected with potential fire hazard. Investigations performed on three mixes, differentiated in proportion of components, indicate potential simply way of composition of ceramizable composite.

Performance of Magnetorheological Elastomer Based Silicone/SAIB

2018 ◽  
Vol 772 ◽  
pp. 61-65
Author(s):  
Muntaz Hana Ahmad Khairi ◽  
Saiful Amri Mazlan ◽  
Ubaidillah ◽  
Siti Aishah Abdul Aziz ◽  
Norhiwani Mohd Hapipi
Keyword(s):  
Rheological Properties ◽  
Silicone Rubber ◽  
Carbonyl Iron ◽  
Excitation Frequency ◽  
Rubber Matrix ◽  
Iron Particles ◽  
Magnetorheological Elastomer ◽  
Magnetorheological Elastomers ◽  
Mr Effect ◽  
Strain Dependent

This study introduces a sucrose acetate isobutyrate (SAIB) as an additive of magnetorheological elastomers (MREs) to be added in silicone rubber matrix and carbonyl iron particles (CIPs) as their filler. The CIPs were fixed at 60 wt% and two types of MREs sample were fabricated which are isotropic and anisotropic. Rheological properties related to shear storage modulus were measured using a rheometer (MCR 302, Anton Paar). The experimental results demonstrated that the magnetorheological (MR) effect of anisotropic MREs-based Silicone/SAIB was 126 % as compared to isotropic MREs-based Silicone/SAIB, 64%. The fabricated MREs samples were frequency and strain dependent. The relative MR effect for both samples showed decreasing trend with the increment of strain amplitude and excitation frequency.

Effect of Rotation Speed and Discharging Temperature on SSBR-Silica Interaction

2016 ◽  
Vol 717 ◽  
pp. 3-8 ◽  
Author(s):  
Ji Wen Liu ◽  
Tao Zhuang ◽  
Guang Shui Yu ◽  
Shu Gao Zhao
Keyword(s):  
Rotation Speed ◽  
Rolling Resistance ◽  
Strength Increase ◽  
Skid Resistance ◽  
Rotor Speed ◽  
Rubber Content ◽  
Elongation At Break ◽  
Dynamic Viscoelasticity ◽  
Bound Rubber ◽  
Wet Skid Resistance

The effects of rotor speed and discharging temperature on silica 1165MP-SSBR 5025-2 interaction as well as the mechanical properties and dynamic viscoelasticity are investigated in this work. The result shows that the discharging temperature increases linearly with increase of rotation speed, leading to increase of bound rubber content. The tensile strength, elongation at break and tear strength increase firstly, and then decrease with increase of rotation speed. However, the strength at 100% and 300% deformation decrease, and then they increase. The wet skid resistance of SSBR5025-2 filled with silica 1165MP improves with increase of rotation speed and discharging temperature, and the rolling resistance decreases.

REINFORCEMENT OF NATURAL RUBBER BY SILICA/SILANE IN DEPENDENCE OF DIFFERENT AMINE TYPES

2017 ◽  
Vol 90 (4) ◽  
pp. 651-666 ◽  
Author(s):  
C. Hayichelaeh ◽  
L. A. E. M. Reuvekamp ◽  
W. K. Dierkes ◽  
A. Blume ◽  
J. W. M. Noordermeer ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Natural Rubber ◽  
Health And Safety ◽  
Aliphatic Amines ◽  
Shielding Effect ◽  
Processing Temperature ◽  
Rubber Content ◽  
Payne Effect ◽  
Rubber Compounds ◽  
Bound Rubber

ABSTRACT Diphenyl guanidine (DPG) is the most commonly used secondary accelerator in silica-reinforced rubber compounds because of its additional positive effect on the silanization reaction and deactivation of free silanol groups that are left over after the silanization. However, because of health and safety concerns about the use of DPG, which decomposes to give highly toxic aniline during high processing temperature, safe alternatives are required. This work investigates the effect of various types of aliphatic amines having alkyl or cyclic structures and similar pKa (i.e., hexylamine [HEX], decylamine [DEC], octadecylamine [OCT], cyclohexylamine [CYC], dicyclohexylamine [DIC], and quinuclidine [QUI]) on the properties of silica-reinforced natural rubber (NR) compounds by taking the ones with DPG and without amine as references. When compared with the compound without amine, the use of all amine types reduces filler–filler interaction (i.e., the Payne effect) and enhances filler–rubber interaction, as indicated by bound rubber content and decreased heat capacity increment. The amines with alkyl chains can reduce the Payne effect and enhance cure rate to a greater extent compared with the amines with cyclic rings as a result of better accessibility toward the silica surface and a shielding effect because of less steric hindrance. The longer carbon tails on linear aliphatic amines ranging from HEX, DEC, to OCT lead to a lower Payne effect, lower heat capacity increment, higher bound rubber content, and higher modulus as well as tensile strength. Overall, the use of OCT provides silica-reinforced NR compounds with properties closest to the reference one with DPG and can act as a potential alternative for DPG.

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