Effect of alkyl-disubstituted ureido silanes with different alkyl chain structures on tracking resistance property of addition-cure liquid silicone rubber

Xie, Chixin; Zeng, Xingrong; Fang, Wenhao; Li, Hongqiang

doi:10.1016/j.polymdegradstab.2017.07.015

Cited by 25 publications

(6 citation statements)

References 35 publications

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“…Figure 7A showed the accumulated FTIR spectrum of volatile products at the maximum degradation rate. The products were mainly composed of CH 4 (3018,1306 cm −1 ), cyclic oligomers (2968, 1265, 1084, 1026, 814 cm −1 ) and H 2 O (3500‐4000 cm −1 ) 20,23,24 . It can be seen from Figure 7A that peaks ascribed to cyclic oligomers of (Pt/BTA)‐3 were all weaker than that of (Pt/BTA)‐0, while a peak at 3018 cm −1 ascribed to CH 4 was stronger and a new peak ascribed to CH 4 appeared at 1306 cm −1 .…”

Section: Resultsmentioning

confidence: 96%

Effect of benzotriazole‐protected platinum catalyst on flame retardancy and ceramic‐forming property of ceramifiable silicone rubber

Jiang

Zhou

Liao

2020

Polymers for Advanced Techs

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The high-performance ceramifiable silicone rubber was prepared by adding Karstedt's Catalyst which was protected by a complexing agent of benzotriazole, Pt/BTA, to the system of silicone rubber (SR)/aluminum hydroxide (ATH)/ZrSiO 4 /glass dust. In this work, effect of Pt/BTA on flame retardancy and ceramic-forming property of ceramifiable silicone rubber and its mechanisms were investigated. When Pt/BTA content was 1137.75 ppm, Pt/BTA/SR/ATH/ZrSiO 4 passed UL-94V-0 rating and SR/ATH/ZrSiO 4 cannot be rated in the vertical burning test. The total heat release and total smoke production were significantly reduced when Pt/BTA was added. Pt/BTA/SR/ATH/ZrSiO 4 composite can support its own weight when heat-treated at 600 C, 800 C, and 1000 C and three-point flexural strength of ceramics increased to 29.47 MPa, which was 102.68% higher than that of SR/ATH/ZrSiO 4 When Pt/BTA content was 1137.75 ppm. The flame-retardant mechanism is discussed via Thermogravimeter-Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy spectra. A three-dimensional network in residues is formed and dramatic depolymerization of polymer backbone can be controlled when Pt/BTA is added in composites. With the addition of Pt/BTA, increased carbon content and formed Si C and C C in residues enhence the quality of char layer, isolating heat and oxygen much more efficiently.

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Section: Resultsmentioning

confidence: 96%

Effect of benzotriazole‐protected platinum catalyst on flame retardancy and ceramic‐forming property of ceramifiable silicone rubber

Jiang

Zhou

Liao

2020

Polymers for Advanced Techs

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“…Content of vinyl groups in the VMQ: The mass fraction of vinyl groups in the VMQ was measured by iodimetry according to a previously reported procedure [21]. First, the VMQ sample was dissolved into a 250 mL iodine flask containing 20 mL of CCl 4 solution.…”

Section: Characterizations and Measurementsmentioning

confidence: 99%

Synthesis of High Molecular Weight Vinylphenyl-Con Taining MQ Silicone Resin via Hydrosilylation Reaction

Liang

et al. 2019

Coatings

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To overcome the inherent limitation that the preparation of high molecular weight MQ copolymers (Mw ≥ 30,000 g/mol) via the hydrolysis and condensation of solicate salts generally results in an intractable gel, vinylphenyl-containing MQ silicone resin with a high molecular weight was designed and synthesized through the hydrosilylation reaction of vinyl-containing MQ silicone resin and linear poly(diphenylsiloxane) with two terminal Si–H bonds. The weight average molecular weight of these modified copolymers reported here is at least 30,000 dal·mol−1. These polymers have favorable thermal stability and a higher refractive index than that of the base resin due to the formation of novel regular macromolecular structures and the introduction of phenyl groups. These inorganic/organic hybrid materials could be used as a potential component for temperature-resistance electronics adhesive, heat-resistant coatings and high-performance liquid silicone rubber. Moreover, the proposed process also provides a possibility to choose higher molecular weight MQ silicones according to application requirements.

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“…Addition-cure liquid silicone rubber (ALSR) is a packaging material that has been widely application in electronics, electrical power, and electrical elds [1][2][3][4][5] because of its excellent high-and low-temperature resistance, good elastic properties, and lack of by-product residues or volatiles. However, practical application of pure ALSR is severely hindered by its poor mechanical properties [6,7] and poor erosion resistance [8][9][10][11][12][13][14]. Packaging material failure due to corrosion often causes great harm to electronic components, which signi cantly threatens the security of electrical systems.…”

Section: Introductionmentioning

confidence: 99%

Efficiently Enhancing Low-dielectric Properties and Chemical Resistances of Addition-cure Liquid Silicone Rubber by Filling With Silicone-modified Eucommia Gum Nanofiller

Sheng-pei

Wang

et al. 2021

Preprint

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It is of great interest and remains a challenge to simultaneously improve the low-dielectric properties and chemical resistances of addition-cure liquid silicone rubber (ALSR). In this work, we proposed an efficient approach to address this issue by filling silicone-modified eucommia gum nanofiller (SEUG) into ALSR. By adding 5 wt% SEUG, the dielectric constant of the SEUG/ALSR composite rubber was significantly lower than that of neat ALSR both at 102 Hz, 103 Hz and 104 Hz. Simultaneously, the SEUG/ALSR composite rubber exhibited better mechanical and insulation properties than the neat ALSR after HCl, NaCl, and oil resistance tests. Our findings demonstrated the great potential for fabricating silicone rubber with low-dielectric properties and erosion resistance by the utilization natural biomass rubber material, endowing it with excellent mechanical performance and degradability.

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Effect of alkyl-disubstituted ureido silanes with different alkyl chain structures on tracking resistance property of addition-cure liquid silicone rubber

Cited by 25 publications

References 35 publications

Effect of benzotriazole‐protected platinum catalyst on flame retardancy and ceramic‐forming property of ceramifiable silicone rubber

Effect of benzotriazole‐protected platinum catalyst on flame retardancy and ceramic‐forming property of ceramifiable silicone rubber

Synthesis of High Molecular Weight Vinylphenyl-Con Taining MQ Silicone Resin via Hydrosilylation Reaction

Efficiently Enhancing Low-dielectric Properties and Chemical Resistances of Addition-cure Liquid Silicone Rubber by Filling With Silicone-modified Eucommia Gum Nanofiller

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