Stability of POSS crosslinks and aggregates in tetrafluoroethylene-propylene elastomers/OVPOSS composites exposed to hydrochloric acid solution

Cong, Chuanbo; cancan, Cui; Meng, Xiaoyu; Zhou, Qiong

doi:10.1016/j.polymdegradstab.2013.12.032

Cited by 20 publications

(9 citation statements)

References 31 publications

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“…Pure OV‐POSS powder has characteristic crystalline peaks at 2Theta value of 9.4, 10.1, 22.8, and 23.7. The peak locations are significantly in line with the results of OV‐POSS spectra given in the literature 29 . As expected, NR/BR based amorphous polymer blend shows characteristic broad and lower intensity peaks when compared with OV‐POSS.…”

Section: Resultssupporting

confidence: 90%

POSS nanoparticles as a potential compatibilizer for natural rubber/butadiene rubber blends

Kalkan

Karakaya

Özkoç

2020

Polymers for Advanced Techs

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In this study, it was aimed to investigate octavinyl‐polyhedral oligomeric silsesquioxane (OV‐POSS) incorporation into natural rubber (NR)/butadiene rubber (BR) elastomer blends as a potential compatibilizer. The effects of OV‐POSS loading levels on the thermal, mechanical, morphological, and dynamic‐mechanical properties of elastomer blends were explored. Fourier‐Transform Infrared Spectrometer (FTIR), Temperature Scanning Stress Relaxation (TSSR), and Differential Scanning Calorimetry (DSC) results revealed the conceivable effect of OV‐POSS nanoparticles in the vulcanization through reacting with sulfur and/or elastomers. Scanning Electron Microscope (SEM), X‐Ray Diffraction (XRD), and tensile test measurements supported the improvement of mechanical properties due to homogeneous dispersion at low loading levels. On the other hand, high amount of OV‐POSS incorporation (7 and 10 phr) resulted in a decrease in mechanical properties, owing to the agglomeration of nanoparticles. According to contact angle and Dynamic mechanical analysis (DMA) results, it could be concluded that OV‐POSS nanoparticles were localized at the interface of the elastomers and enabled the compatibilization of immiscible NR/BR blends.

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Section: Resultssupporting

confidence: 90%

POSS nanoparticles as a potential compatibilizer for natural rubber/butadiene rubber blends

Kalkan

Karakaya

Özkoç

2020

Polymers for Advanced Techs

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“…This situation usually appeared in the POSS-based polymers or composites with unbroken T 3 POSS units. 47,48 The Si 2p peaks located at intermediate BE values of 103.1 and 102.9 eV should be assigned to the emerging Si−OH groups coming from T 3derived T 2 , Q 2 , and Q 3 silicon units, which were also found in some reported POSS-based materials. 48,49 The appearance of Si−OH groups can be attributed to the destruction of POSS cages and cleavage of Si−C and Si−O bonds, 44,46,49 which is consistent with the analyses of 29 Si NMR (Figure 3B).…”

Section: ■ Results and Discussionmentioning

confidence: 83%

“…47,48 The Si 2p peaks located at intermediate BE values of 103.1 and 102.9 eV should be assigned to the emerging Si−OH groups coming from T 3derived T 2 , Q 2 , and Q 3 silicon units, which were also found in some reported POSS-based materials. 48,49 The appearance of Si−OH groups can be attributed to the destruction of POSS cages and cleavage of Si−C and Si−O bonds, 44,46,49 which is consistent with the analyses of 29 Si NMR (Figure 3B). Besides, the additional signals that appeared at higher values of 104.2 and 104.6 eV are assigned to the Si−O 2 structure within the new formed Q 4 units.…”

Section: ■ Results and Discussionmentioning

confidence: 83%

Silanol-Enriched Viologen-Based Ionic Porous Hybrid Polymers for Efficient Catalytic CO₂ Fixation into Cyclic Carbonates under Mild Conditions

Zhang

Liu

et al. 2019

ACS Sustainable Chem. Eng.

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In this work, we report a new family of viologen-based ionic porous hybrid polymers (V-iPHPs) with task-specific multiple catalytic active sites toward efficient catalytic fixation of carbon dioxide (CO2) to value-added cyclic carbonates. The targeted V-iPHPs were fabricated by the solvothermal Heck reaction between two newly designed viologen ionic linkers and octavinylsilsesquioxane (VPOSS). The obtained V-iPHPs possess tunable surface areas (150–562 m2 g–1) and pore volumes (0.41–1.82 cm3 g–1) along with adjustable ionic sites (0.92–1.47 mmol g–1). Especially, a plenty of silanol (Si–OH) groups are in situ formed via breaking polyhedral oligomeric silsesquioxane cages during the synthetic process. The typical catalyst V-iPHP-1 exhibits remarkable metal-free heterogeneous catalytic activities in the CO2 fixation with diverse epoxide substrates under very mild conditions. Besides, the heterogeneous catalyst V-iPHP-1 could be easily recovered with good reusability. The excellent catalytic performance could be assigned to the synergistic catalysis of hydrogen bond donors Si–OH groups and Br– anions, abundant mesoporosities, and the hydrophobic reaction microenvironment.

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“…After adding OVAPOSS, its peak intensity at 18.51 and 20.09° decreased, showing that the addition of OVAPOSS could reduce the crystallinity of the membrane. Comparing the XRD patterns of the pure OVAPOSS reagent and the OVAPOSS membrane, it can be found that both the P 1 D 5 O 5% P 10% membrane and the P 1 D 5 O 7% P 10% membrane had obvious OVAPOSS peaks when 2θ = 9.8, 23.2, and 27.5° [ 23 ], which showed that OVAPOSS had been successfully doped into the membrane.…”

Section: Resultsmentioning

confidence: 99%

Performance Improvement of PVDF–HFP-Based Gel Polymer Electrolyte with the Dopant of Octavinyl-Polyhedral Oligomeric Silsesquioxane

Guo

Chen

et al. 2021

Materials

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Gel polymer electrolytes have the advantages of both a solid electrolyte and a liquid electrolyte. As a transitional product before which a solid electrolyte can be comprehensively used, gel polymer electrolytes are of great research value. They can reduce the risk of spontaneous combustion and explosion caused by leakage during the use of conventional liquid electrolytes. Poly(vinylidene-fluoride-co-hexafluoropropylene) (PVDF–HFP), a material with excellent performance, has been widely utilized in the preparation of gel polymer electrolytes. Here, PVDF–HFP-based gel polymer membranes with polyvinyl pyrrolidone (PVP) pores were prepared using a phase inversion method, and Octavinyl-polyhedral oligomeric silsesquioxane (OVAPOSS) was doped to improve its temperature resistance as well as its ionic conductivity, to enhance its safety and electrochemical performance. The final prepared polymer membrane had a porosity of 85.06% and still had a certain mechanical strength at 160 °C without any shrinkage. The gel polymer electrolyte prepared with this polymer membrane had an ionic conductivity of 1.62 × 10−3 S·cm−1 at 30 °C, as well as an electrochemical window of about 5.5 V. The LiCoO2-Li button half-cell prepared therefrom had a specific capacity of 141 mAh·g−1 at a rate of 1C. The coulombic efficiency remained above 99% within 100 cycles and the capacity retention rate reached 99.5%, which reveals an excellent cycling stability.

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Stability of POSS crosslinks and aggregates in tetrafluoroethylene-propylene elastomers/OVPOSS composites exposed to hydrochloric acid solution

Cited by 20 publications

References 31 publications

POSS nanoparticles as a potential compatibilizer for natural rubber/butadiene rubber blends

POSS nanoparticles as a potential compatibilizer for natural rubber/butadiene rubber blends

Silanol-Enriched Viologen-Based Ionic Porous Hybrid Polymers for Efficient Catalytic CO₂ Fixation into Cyclic Carbonates under Mild Conditions

Performance Improvement of PVDF–HFP-Based Gel Polymer Electrolyte with the Dopant of Octavinyl-Polyhedral Oligomeric Silsesquioxane

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Stability of POSS crosslinks and aggregates in tetrafluoroethylene-propylene elastomers/OVPOSS composites exposed to hydrochloric acid solution

Cited by 20 publications

References 31 publications

POSS nanoparticles as a potential compatibilizer for natural rubber/butadiene rubber blends

POSS nanoparticles as a potential compatibilizer for natural rubber/butadiene rubber blends

Silanol-Enriched Viologen-Based Ionic Porous Hybrid Polymers for Efficient Catalytic CO2 Fixation into Cyclic Carbonates under Mild Conditions

Performance Improvement of PVDF–HFP-Based Gel Polymer Electrolyte with the Dopant of Octavinyl-Polyhedral Oligomeric Silsesquioxane

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Silanol-Enriched Viologen-Based Ionic Porous Hybrid Polymers for Efficient Catalytic CO₂ Fixation into Cyclic Carbonates under Mild Conditions