Preparation and thermal degradation behavior of room temperature vulcanized silicone rubber-g-polyhedral oligomeric silsesquioxanes

Liu, Yufeng; Shi, Yujun; Zhang, Dian; Li, Jiali; Huang, Guangsu

doi:10.1016/j.polymer.2013.08.041

Cited by 72 publications

(55 citation statements)

References 56 publications

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“…Apparently, considering the characteristics resulting from the unique structure, it can be expected that nanocomposites based on the as-prepared SGO will possess outstanding integrated properties. 103.4, 103.1, and 102.6 eV, assigned to the Si-O-C, an 'inorganic SiO 2 -like phase', 46 and Si-O-Ph, 47 respectively, demonstrating that GO has been successfully covalently functionalized by nanosilica. 2 shows the XPS spectra of GO and SGO.…”

Section: Characterization Of Go and Sgomentioning

confidence: 98%

A novel nanosilica/graphene oxide hybrid and its flame retarding epoxy resin with simultaneously improved mechanical, thermal conductivity, and dielectric properties

et al. 2015

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Graphene is regarded as a prominent multi-functional flame retardant for use in halogen-free flame retardant polymers with simultaneously improved integrated properties and special functionalities.However, its flame retardant efficiency is not impressive enough due to the weak resistance to thermooxidative decomposition. In order to overcome this problem, the surface of graphene oxide was covered with large amounts of non-flammable silicas through a sol-gel and surface treatment process, and then used to modify the epoxy (EP) resin. Results show that the incorporation of the as-prepared nanosilica/ graphene oxide (m-SGO) hybrid into EP resin not only obviously increases the flame retardancy, mechanical, and thermal stability properties, but also endows EP resin with high thermal conductivity, low dielectric loss, and high dielectric constant. Specifically, the peaks of the heat release rate and total heat release of the modified EP resin with 1.5% m-SGO decrease by 39% and 10% of those of neat EP resin, respectively. These attractive features of m-SGO/EP nanocomposites are attributed to the unique structure and high resistance to oxidative degradation of m-SGO as well as its good interactions with EP resin. The investigation provides a new approach for the preparation of novel core-shell flame retardants through surface wrapping with other flame retardants on SGO and related high performance flame retardant resins. † Electronic supplementary information (ESI) available: The chemical structure of SGO and typical data from TG curves of EP and its nanocomposites (PDF). See

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Section: Characterization Of Go and Sgomentioning

confidence: 98%

A novel nanosilica/graphene oxide hybrid and its flame retarding epoxy resin with simultaneously improved mechanical, thermal conductivity, and dielectric properties

et al. 2015

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“…Toluene, hexane, ethyl acetate (EtOAc), methanol (MeOH), triethylamine (Et 3 N), diisopropylethylamine ( i Pr 2 EtN), iodobenzene, and triphenylphosphane (PPh 3 ) were purchased from Nacalai Tesque, Inc. Tetrahydrofuran (THF, super dehydrated grade), N , N ‐dimethylformamide (DMF, super dehydrated grade), 1‐methyl‐2‐pyrrolidone (NMP, super dehydrated grade), and toluene (super dehydrated grade) were purchased from Wako Pure Chemical Industry, Ltd. Trichlorosilane, 4‐iodotoluene, 4‐iodoanisole, 2‐iodoanisole, 4‐iodoacetophenone, 3‐iodobenzotrifluoride, 4‐iodobenzonitrile, 4‐diiodobenzene, 4‐bromoiodobenzene, 4‐hydoroxyiodobenzene, 4‐iodophenol, 2‐iodobiphenyl, 2‐iosoyhiophene, 3‐bromopylidine, tris(dibanzylideneacetone)dipalladium(0) (Pd 2 (dba) 3 ) and tris(2‐metylphenyl)phosphane (P( o ‐tol) 3 ) were purchased from Tokyo Chemical Industry Co., Ltd. Heptaisobutyl‐trisilanol‐POSS and heptaphenyl‐trisilanol‐POSS were purchased from Hybrid Plastics. Heptaisobutyl‐POSS ( 1 ) and heptaphenyl‐POSS ( 2 ) were prepared according to the literature procedures.…”

Section: Methodsmentioning

confidence: 99%

“…Bis ( were purchased from Tokyo Chemical Industry Co., Ltd. Heptaisobutyl-trisilanol-POSS and heptaphenyl-trisilanol-POSS were purchased from Hybrid Plastics. Heptaisobutyl-POSS (1) [18] and heptaphenyl-POSS (2) [19] were prepared according to the literature procedures.…”

Section: Methodsmentioning

confidence: 99%

Transition‐Metal‐Catalyzed Direct Arylation of Caged Silsesquioxanes: Substrate Scope and Mechanistic Study

et al. 2019

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Caged silsesquioxane (polyhedral oligomeric silsesquioxane: POSS) is an important class of organic‐inorganic hybrid molecules. The electronic properties of POSS have gradually attracted attention from experimental and computational perspectives, while POSS is generally utilized for reinforcement of polymer materials. Practical synthetic routes to access to aryl‐substituted POSS are effective tools for the systematic studies. Recently, we reported Rh‐catalyzed direct arylation of heptaisobutyl‐POSS with electron‐rich aryl iodides. Herein substrates for the Rh‐catalyzed direct arylation were widely examined: electron‐deficient, sterically‐hindered, and heteroatom‐containing aryl halides, and heptaphenyl‐POSS. Pd‐catalyzed direct arylation of POSS was developed as well. Notably, thiophene was introduced by the Pd‐catalyst, whereas the Rh‐system did not work for the substrate. In addition, the reaction mechanism of the Rh‐catalyzed reaction was elucidated by density functional theory calculations.

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“…Recently, several groups used different kinds of vinyl POSS derivatives to vulcanize silanol terminated polydimethylsiloxane (PDMS) by hydrolytic condensation reaction or to react with hydride PDMS by addition‐type reaction as cross linking agents . The enhancement effect of POSS on mechanical properties, thermal stability and hardness was exhibited in comparison with pristine silicone rubber counterpart.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9] Recently, several groups used different kinds of vinyl POSS derivatives to vulcanize silanol terminated polydimethylsiloxane (PDMS) by hydrolytic condensation reaction or to react with hydride PDMS by addition-type reaction as cross linking agents. [10][11][12][13][14][15][16][17][18][19][20][21][22] The enhancement effect of POSS on mechanical properties, thermal stability and hardness was exhibited in comparison with pristine silicone rubber counterpart. However, it is not persuasive to choose silicone rubbers without fumed silica as a benchmark since their mechanical properties are usually very poor.…”

Section: Introductionmentioning

confidence: 99%

Liquid polyoctahedral silsesquioxanes as an effective and facile reinforcement for liquid silicone rubber

Sun

Kong

2018

J of Applied Polymer Sci

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Acrylo polyoctahedral silsesquioxanes (POSS), a liquid POSS derivative with reactive C=C double bond, is used to modify addition‐cured liquid silicone rubber (LSR) as an effective nanofiller for the first time. Significant enhancements on mechanical properties are obtained. With addition of only 1.5 parts per hundred rubbers (phr) of acrylo POSS to fumed silica‐strengthened silicones, the Young's modulus and ultimate tensile strength are increased by 432% and 66%, respectively, and the hardness of resulting LSR composites is improved as well. Proton nuclear magnetic resonance and Fourier transform infrared spectroscopies prove the efficient hydrosilylation between Acrylo POSS and hydrosiloxane directly. The thermal stability and morphology investigations also confirm that POSS is covalently incorporated into the network of silicone rubber. The increment of crosslink density is proved by extraction and swelling experiment and dynamic mechanical analysis. It can be envisioned that this simple and effective method could help produce high performance silicone rubber composites. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46996.

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Preparation and thermal degradation behavior of room temperature vulcanized silicone rubber-g-polyhedral oligomeric silsesquioxanes

Cited by 72 publications

References 56 publications

A novel nanosilica/graphene oxide hybrid and its flame retarding epoxy resin with simultaneously improved mechanical, thermal conductivity, and dielectric properties

A novel nanosilica/graphene oxide hybrid and its flame retarding epoxy resin with simultaneously improved mechanical, thermal conductivity, and dielectric properties

Transition‐Metal‐Catalyzed Direct Arylation of Caged Silsesquioxanes: Substrate Scope and Mechanistic Study

Liquid polyoctahedral silsesquioxanes as an effective and facile reinforcement for liquid silicone rubber

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