Polyhedral oligomeric silsesquioxane-based hybrid networks obtained via thiol-epoxy click chemistry

Açar, Seda Bekin; Ozcelik, Mustafa; Uyar, Tamer; Taşdelen, Mehmet Atilla

doi:10.1007/s13726-017-0529-x

Cited by 15 publications

(7 citation statements)

References 36 publications

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“…S1, characteristic peaks were observed for the Si-O cage structure at 1092 cm -1 and for the telescopic vibration of the benzene ring skeleton at 1631 cm -1 from DABA [26], confirming the presence of the POSS and DABA components in the composite materials. Meanwhile, the [35], while the peak at 2.01 ppm attributed to the secondary ammonia [33,36] and 0.86 ppm to the hydroxyl. At the same time, the peak at 3.21 ppm corresponding to the proton on the epoxy group [36,37] does not appear in the spectrum of POSS-DABA.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the [35], while the peak at 2.01 ppm attributed to the secondary ammonia [33,36] and 0.86 ppm to the hydroxyl. At the same time, the peak at 3.21 ppm corresponding to the proton on the epoxy group [36,37] does not appear in the spectrum of POSS-DABA. These indicate the occurrence of the epoxy ring-opening reaction between the epoxy groups in G-POSS and the amino groups in monomer DABA.…”

Section: Resultsmentioning

confidence: 99%

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In situ synthesis of star copolymers consisting of a polyhedral oligomeric silsesquioxane core and poly(2,5‐benzimidazole) arms for high‐temperature proton exchange membrane fuel cells

Luo

et al. 2020

Int J Energy Res

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Star copolymers with good film-forming and mechanical properties were insitu synthesized for fabricating proton exchange membranes. The monomers of 3,4diaminobenzoic acid were first grafted onto glycidyl-polyhedral oligomeric silsesquioxane (G-POSS) cores and then propagated to the poly(2,5-benzimidazole) (ABPBI) chains. The introduction of the star copolymer improves the movement of the ABPBI polymer chains, resulting in a lower internal viscosity and larger free volume that favor increased membrane flatness and absorbilities of water and phosphoric acid molecules, respectively. It was found that the star copolymers with 1.0 wt% of incorporated POSS (ABPBI-1.0POSS) had the best balance of the acid retentivity and film-forming property as well as mechanical properties that are desirable for proton exchange membranes without PA loss operating at high temperatures. The enhanced cell performance characteristics obtained using the ABPBI-1.0POSS-based membranes indicate that star copolymers are promising materials for use in high temperature proton exchange membrane fuel cells.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

In situ synthesis of star copolymers consisting of a polyhedral oligomeric silsesquioxane core and poly(2,5‐benzimidazole) arms for high‐temperature proton exchange membrane fuel cells

Luo

et al. 2020

Int J Energy Res

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“…The thiol-ene approach provided well-controlled and tailored architecture of film formation on various thickness supports. In addition to silica NPs, POSS-based reinforcers are also common in thiol-ene- and thiol-epoxy-based coating applications [151,152,153]. POSS endows high reactivity resulting from multifunctional nature and high compatibility with polymer matrix by providing enhanced thermal-mechanical properties and high oxidation-chemical resistance [154,155].…”

Section: Click Chemistry-based Methodologies In Polymer Nanocomposmentioning

confidence: 99%

Polymer Nanocomposites via Click Chemistry Reactions

Arslan

Taşdelen

2017

Polymers

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Abstract:The emerging areas of polymer nanocomposites, as some are already in use in industrial applications and daily commodities, have the potential of offering new technologies with all manner of prominent capabilities. The incorporation of nanomaterials into polymeric matrix provides significant improvements, such as higher mechanical, thermal or electrical properties. In these materials, interface/interphase of components play a crucial role bringing additional features on the resulting nanocomposites. Among the various preparation strategies of such materials, an appealing strategy relies on the use of click chemistry concept as a multi-purpose toolbox for both fabrication and modulation of the material characteristics. This review aims to deliver new insights to the researchers of the field by noticing effective click chemistry-based methodologies on the preparation of polymer nanocomposites and their key applications such as optic, biomedical, coatings and sensor.

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“…Compared to other click reactions, it has additional advantages such as metal-free catalyst system and resulting product containing reactive hydroxyl groups that enable further functionalization. This click reaction is utilized not only in polymer synthesis [18,19] such as synthesis of thermosets [20,21], hybrid network [22][23][24], hydrogels [25] and high-performance coatings [26][27][28], but also in functionalization of polymers [29][30][31]. For the preparation of polymer/clay nanocomposites, only used click reaction is CuAAC click reaction, in which alkyne-functionalized monomers or prepolymers [32,33] are clicked azido-functionalized nanoclay, independently [34].…”

Section: Introductionmentioning

confidence: 99%

In situ preparation of thermoset/clay nanocomposites via thiol-epoxy click chemistry

et al. 2018

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A series of thermoset/clay nanocomposites are prepared by thiol-epoxy click reaction using commercially available starting compounds at ambient conditions in very good yields. The incorporation and exfoliation of clay nanolayers in the thermoset matrix are confirmed by FT-IR, XRD and TEM analyses. The influence of clay loadings on the thermal and mechanical analyses is investigated and all nanocomposites exhibit improved properties than that of the pristine thermoset. The nanocomposite containing 1% montmorillonite by weight has the most improved mechanical properties due to its highly exfoliated structure resulting in efficient interactions between clay and polymer matrix. A further increase of the clay loading results in the aggregation of clay plates to form intercalated structures leading to deteriorated thermal and mechanical properties of nanocomposites.

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Polyhedral oligomeric silsesquioxane-based hybrid networks obtained via thiol-epoxy click chemistry

Cited by 15 publications

References 36 publications

In situ synthesis of star copolymers consisting of a polyhedral oligomeric silsesquioxane core and poly(2,5‐benzimidazole) arms for high‐temperature proton exchange membrane fuel cells

In situ synthesis of star copolymers consisting of a polyhedral oligomeric silsesquioxane core and poly(2,5‐benzimidazole) arms for high‐temperature proton exchange membrane fuel cells

Polymer Nanocomposites via Click Chemistry Reactions

In situ preparation of thermoset/clay nanocomposites via thiol-epoxy click chemistry

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