Grafting of styrene and 2-vinylnaphthalene onto silicone rubber to improve radiation resistance

González-Pérez, Giovanni; Burillo, Guillermina; Ogawa, Teiichiro; Avalos-Borja, M.

doi:10.1016/j.polymdegradstab.2012.05.003

Cited by 28 publications

(15 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Silicone rubber (SiR) has excellent thermal stability, high resistance to oxidative degradation, and good electrical properties [ 1 , 2 ]. It has been widely used in industry as well as in our daily life [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Carrier Transport Properties of Silicone Rubber Degraded by Gamma Irradiation

et al. 2017

View full text Add to dashboard Cite

Silicone rubber (SiR) is used as an insulating material for cables installed in a nuclear power plant. Gamma rays irradiated SiR sheets for various periods at temperatures of 145 and 185 • C, and the resultant changes were analyzed by examining complex permittivity spectra and surface potential decay characteristics. Three different processes, namely, instantaneous polarization, electrode polarization due to the accumulation of ions to form double charge layers at dielectric/electrode interfaces, and DC conduction caused by directional hopping of ions, contribute to the complex permittivity. By fitting the spectra to theoretical equations, we can obtain the dielectric constant at high frequencies, concentration and diffusion coefficient of ions and DC conductivity for the pristine and degraded samples. The instantaneous polarization becomes active with an increase of dose and ageing temperature. The thermal expansion coefficient estimated from the temperature dependence of dielectric constant at high frequencies becomes smaller with an increase in dose, which is in good agreement with the experimental results of the swelling ratio. Additionally, trap distributions are calculated from surface potential decay measurements and analyzed to explain the variation in conductivity. Trap energy increases firstly, and then decreases with an increase in dose, leading to a similar change in DC conductivity. It is concluded that generations of both oxidative products and mobile ions, as well as the occurrence of chain scission and crosslinking are simultaneously induced by gamma rays.

show abstract

Section: Introductionmentioning

confidence: 99%

Dielectric and Carrier Transport Properties of Silicone Rubber Degraded by Gamma Irradiation

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Vinylnaphthalenes can be regarded as one kind of styrene derivatives bearing aromatic‐fused ring. Poly(vinylnaphthalenes) have become of interest owing to their potential applications as fluorescence tags and electron beam lithography resists as well as their interesting photophysical characteristics . However, the well‐controlled polymerization of vinylnaphthalene derivatives remains challenging since the uneven electron density distribution makes naphthalene highly susceptible to nucleophilic reagents and Friedel–Crafts reaction .…”

Section: Methodsmentioning

confidence: 99%

Syndioselective Polymerization of Vinylnaphthalene

Yan

Zhang

et al. 2019

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Coordination polymerizations of 1‐vinylnaphthalene (1VN), 2‐vinylnaphthalene (2VN) and 6‐methoxy‐2‐vinylnaphthalene (MVN) are carried out at room temperature by using the half‐sandwich scandium precursor FluSiMe3Sc(CH2SiMe3)2(THF) (1) and the constrained geometry configuration rare‐earth metal precursors FluCH2PyLn(CH2SiMe3)2(THF)n [Flu = C13H8, Py = C5H4N; Ln = Sc (2a), n = 0; Ln = Lu (2b), Y(2c), n = 1]. Atactic poly(1VN) and perfect syndiotactic poly(2VN) and poly(MVN) are produced by precursors 2a‐2c in a controlled way. Treatment of poly(MVN) with boron tribromide at −20 °C provides a syndiotactic poly(6‐hydroxy‐2‐vinylnaphthalene).

show abstract

“…As a type of functional polymer material, silicone rubber (SR) has the advantages of non‐toxic, good compatibility, insulation, high temperature resistance, radiation resistance, and chemical stability. It is widely used in construction, electronic and electrical engineering, mechanical transportation, and other industries 1‐6 . However, SR is flammable and can release a lot of heat and smoke immediately when being ignited, which limits its use to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a novel synergistic flame retardant and its application in silicone rubber composites

Liu

Wang

et al. 2020

Fire and Materials

View full text Add to dashboard Cite

Summary Dehydration condensation product (DHCP) was prepared by addition and dehydration condensation reactions of 9,10‐dihydro‐9‐oxa‐10‐phenanthrene‐10‐oxide (DOPO), vinyl trimethoxysilane, and (3‐aminopropyl) triethoxysilane. DHCP‐PA with high phosphorus content was prepared by reaction between DHCP and phytic acid (PA). It was then compounded with oxidized multi‐walled carbon nanotubes (OMWCNTs) to prepare silicone rubber (SR) flame retardant composites. The results showed that the SR with a small amount of DHCP‐PA owned good flame retardant effect. The heat release rate (HRR) was decreased from 436 kW/m2 for pure SR to 288 kW/m2 for the SR with 5 phr DHCP‐PA, and the decreasing degree was 33.9%. After mixing 5 phr DHCP‐PA with 1 phr OMWCNTs, the HRR of SR composite was decreased from 436 to 251 kW/m2, the smoke production rate was decreased from 0.161 to 0.087 m2/s, the limited oxygen index value was increased from 20.4% to 28.4%, and the flame retardant grade can reach UL94 V‐0. In addition, the synergistic flame retardant mechanism was researched and analyzed.

show abstract

Grafting of styrene and 2-vinylnaphthalene onto silicone rubber to improve radiation resistance

Cited by 28 publications

References 17 publications

Dielectric and Carrier Transport Properties of Silicone Rubber Degraded by Gamma Irradiation

Dielectric and Carrier Transport Properties of Silicone Rubber Degraded by Gamma Irradiation

Syndioselective Polymerization of Vinylnaphthalene

Preparation of a novel synergistic flame retardant and its application in silicone rubber composites

Contact Info

Product

Resources

About