Synthesis and characterization of silsesquioxanes with structure of incompletely condensed cages

Przybylak, Marcin; Maciejewski, Hieronim; Marciniec, Bogdan

doi:10.14314/polimery.2013.741

Cited by 2 publications

(4 citation statements)

References 15 publications

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“…Polyhedral oligomeric silsesquioxanes (POSS) are nanostructures with the empirical formula RSiO 1.5 , where R is a hydrogen atom or an organic group such as alkyl, alkylene, acrylate, hydroxyl, or epoxide units [4,5,6,7,8]. POSS may be referred to as a silica nanoparticle, consisting of a silica cage core and other organic functional groups attached to the corners of the cage [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyhedral Oligomeric Silsesquioxane on the Melting, Structure, and Mechanical Behavior of Polyoxymethylene

Czarnecka‐Komorowska

Sterzyński

2018

Polymers

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The effects of octakis[(3-glycidoxypropyl)dimethylsiloxy]octasilsesquioxane (GPOSS) on the crystallinity, crystal structure, morphology, and mechanical properties of polyoxymethylene (POM) and POM/GPOSS composites were investigated. The POM/GPOSS composites with varying concentrations of GPOSS nanoparticles (0.05–0.25 wt %) were prepared via melt blending. The structure of POM/GPOSS composites was characterized by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), and polarized light microscopy (PLM). The mechanical properties were determined by standardized tensile tests. The morphology and dispersion of GPOSS nanoparticles in the POM matrix were investigated with scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis. It was observed that the dispersion of the GPOSS nanoparticles was uniform. Based on DSC studies, it was found that the melting temperature, lamellar thickness, and the degree of crystallinity of the POM/GPOSS composites increased. The POM/GPOSS composites showed an increased Young’s modulus and tensile strength. Finally, compared with the pure POM, the addition of GPOSS reduced the spherulites’ size and improved the crystallinity of the POM, which demonstrates that the nucleation effect of GPOSS is favorable for the mechanical properties of POM.

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Section: Introductionmentioning

confidence: 99%

Effect of Polyhedral Oligomeric Silsesquioxane on the Melting, Structure, and Mechanical Behavior of Polyoxymethylene

Czarnecka‐Komorowska

Sterzyński

2018

Polymers

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“…5-(Allyloxy)-1,1,2,2,3,3,4,4-octafluoropentane was synthesized by aW illiamson reaction. [28] Synthesis of 3,7,14-tris[dimethylsiloxy]-1,3,5,7,9,11,14-heptaisobutyltricyclo [7.3.3. 15,11 ]heptasiloxane-endo-3,7,14-triol was synthesized by hydrolytic condensation of isobutyltrimethoxysilaneu nder basic conditions according to aprocedure described elsewhere.…”

Section: Methodsmentioning

confidence: 99%

“…15,11 ]heptasiloxane-endo-3,7,14-triol was synthesized by hydrolytic condensation of isobutyltrimethoxysilaneu nder basic conditions according to aprocedure described elsewhere. [28] Synthesis of 3,7,14-tris[dimethylsiloxy]-1,3,5,7,9,11,14-heptaisobutyltricyclo[7.3.3. 15,11 ]heptasiloxane-SiH-POSS (1):T he synthesis was based on the hydrolytic condensation of 1,3,5,7,9,11,14heptaisobutyltricyclo[7.3.3.…”

Section: Methodsmentioning

confidence: 99%

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Synthesis of an Open‐Cage Structure POSS Containing Various Functional Groups and Their Effect on the Formation and Properties of Langmuir Monolayers

Dutkiewicz

Karasiewicz

Rojewska

et al. 2016

Chemistry A European J

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Recently, silsesquioxanes have been recognized as a new group of film-forming materials. This study has been aimed at determining the effect of the kind of functional groups present in two different open-cage structure POSS molecules on the possibility of the formation of Langmuir monolayers and their properties. To achieve this goal, two new POSS derivatives (of open-cage structures) containing polyether and fluoroalkyl functional groups have been synthesized on the basis of a hydrosilylation process. An optimization of the process was performed, which makes it possible to obtain the above-mentioned derivatives with high yields. In the next step, the Langmuir technique was applied to measurements of the surface pressure (π) - the mean molecular area (A) isotherms during the compression of monolayers formed by molecules of the two POSS derivatives considered. Subsequently, the monolayers were transferred onto quartz plates according to the Langmuir-Blodgett technique. Both derivatives are able to form insoluble Langmuir films at the air-water interface, which can be transferred onto a solid substrate and effectively change its wetting properties.

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Synthesis and characterization of silsesquioxanes with structure of incompletely condensed cages

Cited by 2 publications

References 15 publications

Effect of Polyhedral Oligomeric Silsesquioxane on the Melting, Structure, and Mechanical Behavior of Polyoxymethylene

Effect of Polyhedral Oligomeric Silsesquioxane on the Melting, Structure, and Mechanical Behavior of Polyoxymethylene

Synthesis of an Open‐Cage Structure POSS Containing Various Functional Groups and Their Effect on the Formation and Properties of Langmuir Monolayers

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