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

Dodecanol and KH-592 Co-Modify Silica to Prepare Low Heat Build-Up and High Performance Natural Rubber Composites

NANO ◽  
2020 ◽  
Vol 15 (06) ◽  
pp. 2050078
Author(s):  
Bo Yang ◽  
Dong An ◽  
Yaqing Liu ◽  
Shuaishuai Cheng ◽  
Zhiyi Zhang
Keyword(s):  
Composite Material ◽  
Natural Rubber ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Hydroxyl Groups ◽  
Rubber Composites ◽  
Modify Silica ◽  
Silane Coupling ◽  
The Matrix ◽  
Heat Build Up

Friction between filler/filler and filler/matrix in rubber composites is the main factor affecting the heat build-up. In this study, we used dodecanol and silane coupling agent KH-592 to co-modify silica to prepare silica/natural rubber (NR) composites. When dodecanol and KH-592 are grafted onto the surface of silica at the same time, dodecanol can also shield part of the hydroxyl groups by its molecular chain length, which further improves the dispersibility of silica particles. The silane coupling agent KH-592 can form a bridge structure between the silica and the NR matrix under the action of a mercapto group, and improve the interaction between the filler and the matrix. By controlling the use ratio of dodecanol and KH-592, the dispersion of the filler and the interaction between the filler and the matrix can be adjusted. Thereby, the friction between the filler/filler and the filler/matrix is reduced, and a low heat build-up rubber composite material is prepared. Through co-modification, we prepared a series of low-heat build-up silica/NR composites, where the minimum heat generation reached 13∘C. The co-modified silica/NR composite material not only meets the requirements of green tires, but also has low heat build-up characteristics, providing a new strategy for preparing green and energy-saving tires.

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.

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.

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