scholarly journals Silicone Rubber Composites with High Breakdown Strength and Low Dielectric Loss Based on Polydopamine Coated Mica

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2030 ◽  
Author(s):  
Yifan Liao ◽  
Yunxuan Weng ◽  
Jiaqi Wang ◽  
Hongfu Zhou ◽  
Jun Lin ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Dielectric Loss ◽  
Silicone Rubber ◽  
Silane Coupling Agent ◽  
Breakdown Strength ◽  
The Other ◽  
Inorganic Filler ◽  
Rubber Composites ◽  
Low Dielectric ◽  
Silane Coupling

High breakdown strength and low dielectric loss are necessary for the outdoor insulator using silicone rubber (SR) composites. In this work, polydopamine coated mica (mica-PDA) was synthesized via bioinspired dopamine self-polymerization, and mica-PDA-filled SR composite (SR/mica-PDA-VTMS) was prepared using vinyl tri-methoxysilane (VTMS) as a silane coupling agent which serves as the molecular bridges between the organic rubber and the inorganic filler. The SR/mica-PDA-VTMS composite demonstrated dense and uniform morphology where the filler was well dispersed. Due to the strong interfacial interactions between filler and rubber, the SR/mica-PDA-VTMS composite exhibits much lower dielectric loss compared to the other mica-filled SR composites, which was comparable to the prepared alumina-tri-hydrate-filled SR composites. Moreover, the breakdown strength of ~31.7 kV/mm and tensile strength of 5.4 MPa were achieved for the SR/mica-PDA-VTMS composite, much higher than those of the other as-prepared SR composites.

Improving properties of silicone rubber composites using macromolecular silane coupling agent (MMSCA)

2016 ◽  
Vol 133 (19) ◽  
pp. n/a-n/a ◽  
Author(s):  
Honggang Mei ◽  
Guowen Chen ◽  
Qingzeng Zhu ◽  
Peng Dong ◽  
Dannan Zhao ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Rubber Composites ◽  
Silane Coupling

Derived from poplar leaves graphene-modified silicone rubber composites

2019 ◽  
Vol 33 (12) ◽  
pp. 1591-1602 ◽  
Author(s):  
Weili Wu ◽  
He Huang
Keyword(s):  
Mechanical Properties ◽  
Silicone Rubber ◽  
Silane Coupling Agent ◽  
Rubber Composites ◽  
Elongation At Break ◽  
Green Materials ◽  
Silane Coupling ◽  
Thermal Stability Of ◽  
Better Than ◽  
Poplar Leaves

Poplar leaves graphene (PLG) was synthesized from the poplar leaves. Modified poplar leaves graphene (M-PLG) was obtained by graphene treated with silane coupling agent γ-aminopropyltriethoxysilane (KH550). The M-PLG-modified silicone rubber (methyl ethylene silicon rubber [MVQ]) composites were prepared by mechanical blending. The effects of M-PLG on the mechanical properties, thermal properties, and morphology structure of MVQ were investigated. The results showed that the carbon content and purity of the PLG were high. The M-PLG can be evenly dispersed into MVQ compared with the PLG, the mechanical properties of the M-PLG/MVQ composites were better than those of the PLG/MVQ when M-PLG content was 0.1 parts per hundred rubber (phr), the tensile strength and elongation at break are increased by 36.2% and 19.4% respectively, and wear resistance increased by 57.1%. The thermal stability of the M-PLG/MVQ was also better. This concept of combining PLG with MVQ demonstrated the potential of preparing novel green materials with excellent properties.

Processibility and Mechanical Properties of Mullite-Filled Styrene Butadiene Rubber Composites

2011 ◽  
Vol 284-286 ◽  
pp. 401-410
Author(s):  
Qiong Qiong Liu
Keyword(s):  
Mechanical Properties ◽  
Silane Coupling Agent ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Rubber Composites ◽  
Precipitated Silica ◽  
Roll Mill ◽  
Silane Coupling ◽  
Styrene Butadiene ◽  
Reinforcing Filler

Mullite (3A12O3·2SiO2) is an aluminosilicate ceramic of great technological importance. We investigated its potential as fillers in rubber. Mullites untreated or treated with 3% γ-mecapto-propyltrimethoxysilane (A-189) were added into styrene-butadiene rubber (SBR) materials on a laboratory-sized two-roll mill. For comparison, commercial precipitated silica was also used. The effect of these fillers on the cure characteristics, processibility and mechanical properties of SBR at various loadings, ranging from 0 to 50 phr was investigated. The results showed that mullite was a semi-reinforcing filler for SBR materials and exhibits better overall cure properties, lower Mooney viscosity, lower tensile set, better resilience as compared to precipitated silica, while it is inferior to precipitated silica especially with regard to tensile strength, tear strength and abrasion resistance. The presence of the silane coupling agent can enhance mechanical properties of filled SBR vulcanizates to some extent.

Improving the breakdown strength of (Mg0.9Zn0.1)2(Ti1−xMnx)O4 ceramics with low dielectric loss

2015 ◽  
Vol 41 (1) ◽  
pp. 521-525 ◽  
Author(s):  
Wen Lei ◽  
Yong-Yi Yan ◽  
Xiao-Hong Wang ◽  
Wei Lu ◽  
Zhou-Bing Yang ◽  
...  
Keyword(s):  
Dielectric Loss ◽  
Breakdown Strength ◽  
Low Dielectric

scholarly journals Silane Coupling Agent Modifies the Mechanical Properties of a Chitosan Microfiber

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5292 ◽  
Author(s):  
Yuki Shirosaki ◽  
Toshinobu Okabayashi ◽  
Saki Yasutomi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Crosslinking Agent ◽  
Medical Applications ◽  
Silane Coupling

Chitosan microfibers are widely used in medical applications because they have favorable inherent properties. However, their mechanical properties require further improvement. In the present study, a trimethoxysilane aldehyde (TMSA) crosslinking agent was added to chitosan microfibers to improve their tensile strength. The chitosan microfibers were prepared using a coagulation method. The tensile strength of the chitosan microfibers was improved by crosslinking them with TMSA, even when only a small amount was used (less than 1%). TMSA did not change the orientation of the chitosan molecules. Furthermore, aldehyde derived from TMSA did not remain, and siloxane units were formed in the microfibers.

Tensile Properties of Wollastonite Filled High Density Polyethylene/Natural Rubber Composites

2015 ◽  
Vol 754-755 ◽  
pp. 215-219
Author(s):  
Ismail Yuhaida ◽  
Husseinsyah Salmah ◽  
Hanafi Ismail ◽  
Zainuddin Firuz
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Tensile Properties ◽  
High Density Polyethylene ◽  
High Density ◽  
Inorganic Filler ◽  
Rotor Speed ◽  
Rubber Composites ◽  
Elongation At Break ◽  
Natural Rubber Composites

Wollastonite is one type of inorganic filler. The effects of wollastonite loading on tensile properties of wollastonite (WS) filled high density polyethylene (HDPE)/Natural Rubber (NR) composites was studied. The HDPE/NR/WS composites were prepared by using Brabender EC Plus at a temperature of 180 °C with rotor speed of 50 rpm for 10 min. It was found that the increasing of wollastonite loading had decreased the tensile strength and elongation at break, whereas the Young’s modulus of the HDPE/NR/WS composites had increased with the increasing of wollastonite loading.

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