Silica/poly (<i>N</i>‐vinylimidazolium) nanospheres by combined RAFT polymerization and thiol‐ene click chemistry

Peng, Chang; Wu, Pan; Bao, Lin; Chen, Shu; Chen, Yi; Han, Mingsong; Xiong, Yan; Xu, Weijian

doi:10.1002/pat.3271

Cited by 15 publications

(8 citation statements)

References 28 publications

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“…[30] As for SBR-g-MMI, beyond those peaks ascribed to the SBR backbone, the characteristic peaks belonging to C = C-H of imidazole ring (3,127 cm ) are clearly observed, [25,31] indicate that MMI molecules are successfully grafted onto the SBR chains by the thiol-ene reaction. [32,33] Additionally, XPS was used to further analyze the changed chemical environment of atoms for confirming the reactivity of MMI toward SBR chains. The interactions between MMI and SBR can be reflected by the binding energy of sulfur (S) atoms in MMI and SBR-g-MMI because of the existence of chargetransfer after thiol-ene reaction.…”

Section: Reactivity Of 2-mercapto-1-methylimidazole Toward Styrene Bumentioning

confidence: 99%

Morphology and performance of styrene butadiene rubber filled with modified graphite nanoplatelet and carbon black

Chen

Lin

Luo

et al. 2016

Polym. Adv. Technol.

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In our work, effects of 2-mercapto-1-methylimidazole modified graphite nanoplatelet (MMI-GN) and carbon black (CB) on static and dynamic mechanical properties of styrene butadiene rubber (SBR) composites were studied. MMI-GN is synthesized by ball-mill process, and the result reveals that π-π interactions existed between MMI and GN. The results demonstrate that the static and dynamic mechanical performances of SBR/CB/MMI-GN composites are significantly improved over these of SBR/CB and SBR/CB/GN composites. Compared with SBR/CB, the tensile strength, tear strength, and modulus at 300% elongation of SBR/CB/MMI-GN-3 are greatly improved by 45%, 27%, and 4%, respectively. And the rolling resistance of SBR/CB/MMI-GN-3 is reduced by 3.7% with remaining almost unchanged in the wet grip property. The superiority of MMI-GN in the enhancement for the overall performance of SBR/CB composites is attributed to the well dispersion of GN throughout the SBR matrix and the enhanced interfacial interactions between GN and the SBR matrix. This work might expedite synthesis of the graphite-based materials for enhancing rubber composites, and enlarge the potential applications of modified graphite to fabricate the high-performance rubber composites.

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Section: Reactivity Of 2-mercapto-1-methylimidazole Toward Styrene Bumentioning

confidence: 99%

Morphology and performance of styrene butadiene rubber filled with modified graphite nanoplatelet and carbon black

Chen

Lin

Luo

et al. 2016

Polym. Adv. Technol.

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“…The thiol–ene reaction is one of the most important types of click reactions, which allows simple and efficient synthesis of different polymeric networks. This reaction includes the radical addition of thiol functional groups to electron‐rich enes and producing thioether network . High efficiency, uniform distribution of monomers in the polymer network, oxygen and moisture insensitivity, inoffensive by‐product, and relatively high reaction rates are some of the main advantages of thiol‐ene click reaction which are beneficial for the preparation of polymeric network as the heterogeneous acid–base catalyst.…”

Section: Introductionmentioning

confidence: 98%

Synthesis of multifunctional polymer containing Ni‐Pd NPs via thiol‐ene reaction for one‐pot cascade reactions

Kalbasi

Mesgarsaravi

Gharibi

2019

Applied Organom Chemis

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Recently, acid–base bifunctional catalysts have been considered due to their abilities, such as the simultaneous activation of electrophilic and nucleophilic species and their high importance in organic syntheses. However, the synthesis of acid–base catalysts is problematic due to the neutralization of acidic and basic groups. This work reports a facial approach to solve this problem via the synthesis of a novel bifunctional polymer using inexpensive materials and easy methods. In this way, at the first step, heterogeneous poly (styrene sulfonic acid‐n‐vinylimidazole) containing pentaerythritol tetra‐(3‐mercaptopropionate) (PETMP) and trimethylolpropane trimethacrylate (TMPTMA) cross‐linkers were synthesized in the pores of a mesoporous silica structure using click reaction as a novel bifunctional acid–base catalyst. After that, Ni‐Pd nanoparticles supported on poly (styrenesulfonic acid‐n‐vinylimidazole)/KIT‐6 as a novel trifunctional heterogeneous acid–base‐metal catalyst was prepared. The prepared catalysts were characterized by various techniques like FT‐IR, TGA, ICP‐AES, DRS‐UV, TEM, FE‐SEM, EDS‐Mapping, and XRD. The synthesized catalysts were efficiently used as bifunctional/trifunctional catalysts for one‐pot, deacetalization‐Knoevenagel condensation and one‐pot, three‐step and a sequential reaction containing deacetalization‐Knoevenagel condensation‐reduction reaction. It is important to note that the synthesized catalyst showing high chemo‐selectivity for the reduction of nitro group, alkenyl double bond and ester group in the presence of nitrile. Moreover, it was found that the different nanoparticles including Ni, Pd, and alloyed Ni‐Pd showing different chemo‐selectivity and catalytic activity in the reaction.

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“…In the last two decades, there have been increasing research activities in the use of various polymerization methods to prepare macromolecular brushes. These polymerization methods include ring‐opening polymerization, click reaction, cationic polymerization, anionic polymerization, radical (co)polymerization, reversible addition‐fragmentation chain transfer polymerization (RAFT), nitroxide‐mediated polymerization (NMP), and atom transfer radical polymerization (ATRP), as well as combinations of different methods . Considering these techniques, macromolecular brushes can be synthesized via three main approaches: “grafting through”, “grafting onto”, or “grafting from” .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of naringin‐based polymer brushes via seATRP

Chmielarz

2017

Polymers for Advanced Techs

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The flavonoid-based macromolecule initiator was prepared for the first time by the transesterification reaction of naringin with 2-bromoisobutyryl bromide. In accordance with the "grafting from" methodology, a naringin-based copolymer brush with a polar naringenine-7-rhamnosidoglucoside core and an amphiphilic poly(methyl methacrylate)-block-poly(Nisopropylacrylamide) (PMMA-b-PNIPAM) side chains was synthesized for the first time via a simplified electrochemically mediated ATRP (seATRP), utilizing only 40 ppm of catalytic complex. The rate of the polymerizations was controlled by applying optimal potential or current values during preparative electrolysis to prevent the possibility of intermolecular coupling of the growing polymer brushes. Naturally derived polymer brushes showed narrow molecular weight distributions (Đ = 1.06−1.08).1 H NMR spectral results confirm the formation of citrus-based polymer brushes. These new naringin-based polymer materials may find biomedical applications as thermo-sensitive drug delivery systems, membranes, and biologically active thin films in tissue engineering.

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Silica/poly (N‐vinylimidazolium) nanospheres by combined RAFT polymerization and thiol‐ene click chemistry

Cited by 15 publications

References 28 publications

Morphology and performance of styrene butadiene rubber filled with modified graphite nanoplatelet and carbon black

Morphology and performance of styrene butadiene rubber filled with modified graphite nanoplatelet and carbon black

Synthesis of multifunctional polymer containing Ni‐Pd NPs via thiol‐ene reaction for one‐pot cascade reactions

Synthesis of naringin‐based polymer brushes via seATRP

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