scholarly journals A novel crosslinking agent of polymethyl(ketoxime)siloxane for room temperature vulcanized silicone rubbers: synthesis, properties and thermal stability

RSC Advances ◽  
2018 ◽  
Vol 8 (23) ◽  
pp. 12517-12525 ◽  
Author(s):  
Xibing Zhan ◽  
Xiqing Cai ◽  
Junying Zhang
Keyword(s):  
Thermal Stability ◽  
Silicone Rubber ◽  
Room Temperature ◽  
Crosslinking Agent ◽  
Synthesis Properties ◽  
Cross Linker ◽  
Silicone Rubbers ◽  
Rtv Silicone Rubber

A novel cross-linker polymethyl(ketoxime)siloxane was synthesized and then was cured with hydroxyl-terminated polydimethylsiloxane matrix to fabricate a series of novel RTV silicone rubber. Their properties was comparatively investigated.

scholarly journals Synthesis and Characterization of Room Temperature Vulcanized Silicone Rubber Using Methoxyl-Capped MQ Silicone Resin as Self-Reinforced Cross-Linker

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1142 ◽  
Author(s):  
Jianye Ji ◽  
Xin Ge ◽  
Xiaoyan Pang ◽  
Ruoling Liu ◽  
Shuyi Wen ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Room Temperature ◽  
Degradation Rate ◽  
Light Transmission ◽  
Characteristic Temperature ◽  
Cross Linking ◽  
Silicone Resin ◽  
Cross Linker ◽  
Rtv Silicone Rubber

Methoxyl-capped MQ silicone resin (MMQ) was first synthesized by the hydrosilylation of vinyl-containing MQ silicone resin and trimethoxysilane and then used in condensed room-temperature vulcanized (RTV) silicone rubber as a self-reinforced cross-linker. Results show that modified silicone rubber exhibits good light transmission. Compared with unmodified silicone rubber, the hardness, tensile strength and elongation of MMQ at the break are increased by 26.4 A, 2.68 MPa and 65.1%, respectively. In addition, the characteristic temperature of 10% mass loss is delayed from 353.5 °C to 477.1 °C, the temperature at maximum degradation rate is also delayed from 408.9 °C to 528.4 °C and the residual mass left at 800 °C is increased from 1.2% to 27.7%. These improved properties are assigned to the synergistic effect of the rigid structure of MMQ, the formation of a dense cross-linking structure in polymers and the uniform distribution of MMQ cross-linking agent in RTV silicone rubber.

Application of Silicone TQ Resin Reinforced RTV Silicone Rubber in Architecture

2012 ◽  
Vol 529 ◽  
pp. 492-496
Author(s):  
Yang Li ◽  
Wen Juan Gu ◽  
Da Yu Yang
Keyword(s):  
Mechanical Properties ◽  
Thermogravimetric Analysis ◽  
Thermal Degradation ◽  
Silicone Rubber ◽  
Tensile Testing ◽  
Room Temperature ◽  
Sol Gel ◽  
Thermal Stabilities ◽  
Silicone Rubbers ◽  
Rtv Silicone Rubber

A kind of silicone TQ resin was first synthesized with Dodecyltrimethoxysilane (WD10) and tetraethoxysilane (TEOS) by sol-gel method. And the RTV (Room Temperature Vulcanized) silicone rubbers using as-synthesized TQ silicone resins as filler were prepared. Thermal degradation and mechanical properties of these RTV silicone rubbers were studied by means of thermogravimetric analysis and tensile testing. The experimental results showed that both mechanical properties and thermal stabilities of RTV silicone rubbers were significantly improved by using the as-synthesized TQ silicone resins as filler. The RTV silicone rubber can be used to make the molds of architectural components ornamentation. The aim is not only to repair architectural components with decoration, but also for further study and research of ancient architectural conservation.

Preparation and characterization of room temperature vulcanized silicone rubber using α-amine ketoximesilanes as auto-catalyzed cross-linkers

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 38447-38453 ◽  
Author(s):  
Qian Zhao ◽  
Qingyang Liu ◽  
Huihui Xu ◽  
Yiling Bei ◽  
Shengyu Feng
Keyword(s):  
Silicone Rubber ◽  
Room Temperature ◽  
Rtv Silicone Rubber

A series of α-amine ketoximesilanes were prepared and used as auto-catalyzed cross-linkers in one component room temperature vulcanized (RTV) silicone rubber.

Synthesis and thermal properties of modified room temperature vulcanized (RTV) silicone rubber using polyhedral oligomeric silsesquioxane (POSS) as a cross linking agent

RSC Advances ◽  
2014 ◽  
Vol 4 (78) ◽  
pp. 41453-41460 ◽  
Author(s):  
Yunhui Shi ◽  
Xiaoxiao Gao ◽  
Dian Zhang ◽  
Yufeng Liu ◽  
Guangsu Huang
Keyword(s):  
Thermal Properties ◽  
Silicone Rubber ◽  
Room Temperature ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Cross Linking ◽  
Oligomeric Silsesquioxane ◽  
Rtv Silicone Rubber

Incompletely condensed tetra-silanol-phenyl-polyhedral oligomeric silsesquioxane (TOPO) was synthesized first and then copolymerized with hydroxy terminated polydimethylsiloxane (HPDMS) as a cross linking agent to prepare room temperature vulcanized (RTV) silicone rubber (TOPO–PDMS).

scholarly journals Theoretical Investigation of the Hydrolytic Mechanism of α-Functionalized Alkoxysilanes as Effective Crosslinkers and the Difficulty of Deep Vulcanization in RTV Silicone Rubber

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1526
Author(s):  
Huihui Xu ◽  
Yanhong Gao ◽  
Zihou Liu ◽  
Yiling Bei
Keyword(s):  
Density Functional Theory ◽  
Silicone Rubber ◽  
Density Functional ◽  
Room Temperature ◽  
Reaction Pathway ◽  
Stationary Points ◽  
Functional Theory ◽  
Hydrolytic Mechanism ◽  
Hydrolysis Activity ◽  
Rtv Silicone Rubber

The reactions between α-, γ-ethylenediaminemethyl trimethyl-ketoxime silane (α-, γ-EAMOS) and H2O were investigated on the geometries of stationary points, the reaction pathway (IRC), thermodynamic and kinetic analysis by density functional theory (DFT) at the B3LYP/6-311G (d, p) level. Interestingly, the results showed that the hydrolysis activity of α-EAMOS is higher than that of γ-EAMOS, due to the influence of an amino substituent in position α-C on silicon. α-EAMOS can be used as a superior crosslinker for room temperature vulcanized (RTV) silicone rubber to achieve rapid crosslinking without a toxic catalyst. Besides, compared with the reaction between α-EAMOS and H2O, the reactivity between α-EAMOS and hydroxy siloxane (HO–Si(CH3)2–OSiH3) was discussed. Particularly, it revealed that the deep vulcanization of RTV silicone rubber is difficult.

scholarly journals RTV silicone insoles

1984 ◽  
Vol 8 (1) ◽  
pp. 54-55 ◽  
Author(s):  
D. J. Pratt ◽  
P. H. Rees ◽  
R. H. Butterworth
Keyword(s):  
Pain Relief ◽  
Physical Properties ◽  
Silicone Rubber ◽  
Room Temperature ◽  
Fast Method ◽  
Provide Pain Relief ◽  
Rtv Silicone Rubber

A cheap and fast method of providing long term accommodating insoles is described. Room temperature vulcanizing (RTV) silicone rubber is used, with suitable coverings, to provide pain relief and support for feet and ankles. The combination of physical properties of the finished item provides a useful balance between support and flexibility which results in these insoles being readily accepted by the patients.

Synergistic effect and mechanism of polysilazane and platinum on the thermal stability of silicone rubber

2021 ◽  
pp. 009524432110386
Author(s):  
Wanjuan Chen ◽  
Xueyi Zhang ◽  
Caiying Liang ◽  
Dongchu Chen ◽  
Min Zhang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Fourier Transform ◽  
Silicone Rubber ◽  
Fourier Transform Infrared ◽  
Infrared Spectrometry ◽  
Fourier Transform Infrared Spectrometry ◽  
Degradation Rates ◽  
Shape Retention ◽  
Silicone Rubbers ◽  
Thermal Stability Of

Polysilazane and platinum were adopted to enhance the thermal stability of silicone rubber. The effect and mechanism of polysilazane and platinum on enhancing thermal stability were investigated via thermogravimetry, scanning electron microscopy-energy dispersive X-ray spectrometry, thermogravimetry-Fourier transform infrared spectrometry, and Fourier transform infrared spectrometry. Remarkable synergism between polysilazane and platinum was found in enhancing thermal stability of silicone rubber. When 1.34 wt% polysilazane and 8 ppm platinum were added, the degradation temperatures were elevated. Furthermore, the thermal residues of silicone rubbers were increased from 30–45 to 66–76 wt%, and maximum degradation rates were reduced from 8.81–15.8 to 4.55–5.02 wt%/min. Besides, silicone rubber demonstrated excellent shape retention at high temperature in the presence of polysilazane and platinum. The mechanism may be that platinum cooperated with polysilazane and efficiently catalyzed radical crosslinking between polysilazane and silicone chains. As a result, a tightly crosslinked network was developed, and degradation of silicone rubber was suppressed.

Sign in / Sign up

Export Citation Format

Share Document