Nano-hybrid polymers containing polyhedral oligosilsesquioxanes (POSS)

Janowski, Bartłomiej; Pielichowski, Krzysztof

doi:10.14314/polimery.2008.088

Cited by 26 publications

(32 citation statements)

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“…A growing number of PU materials and devices enter the biomedical sector. PUs versatility originates from their chemical background that makes it possible to apply various diols and diisocyanates, as well as chain extenders . The characteristic group in PUs is the urethane linkage produced from the reaction of an isocyanate (–NCO) with an alcohol (–OH).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and morphology of rigid polyurethane foams with POSS as pendant groups or chemical crosslinks

Hebda

Ozimek

Raftopoulos

et al. 2015

Polym. Adv. Technol.

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a This work reports on the preparation of polyurethane foams (PUFs) chemically modified by functionalized 1,2-propanediolisobutyl polyhedral oligosilsesquioxane (PHI-POSS) as pendant groups and octa(3-hydroxy-3-methylbutyldimethylsiloxy) POSS (OCTA-POSS) as chemical crosslinks. The resulting foams, which contain 0 to 15 wt% POSS (versus polyol), were characterized in terms of their structure, morphology, density, thermal conductivity, compressive strength, and water absorption. Fourier transform infrared-attenuated total reflectance revealed good reaction rate between POSS and PUF. PHI-POSS suppresses the formation of the hydrogen bonds in the soft phase. The composite foams with OCTA-POSS showed a reduced number of cells and increased average area of foam cells in comparison with the PUF, while the addition of PHI-POSS causes an increase in the number of cells of the foam as compared with the reference, and thus a reduction in the average area of cells. Scanning electron microscopyenergy-dispersive X-ray spectroscopy analysis revealed that POSS moieties form lamellae-shaped crystals of different sizes, distributed homogeneously in the bulk (PHI-POSS) or close to the self surfaces (OCTA-POSS). The compressive strength of PUF/POSS hybrids in the direction parallel and perpendicular to the direction of foam rise is greater than the strength of the reference foam. PHI-POSS improves monotonically the compressive strength in the studied loading range. About 5 wt% OCTA-POSS also provides reinforcement, but further loading reverses the phenomenon. PUF/POSS hybrids absorb less water than the pristine foam because of an increase of foam density.

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Section: Introductionmentioning

confidence: 99%

Synthesis and morphology of rigid polyurethane foams with POSS as pendant groups or chemical crosslinks

Hebda

Ozimek

Raftopoulos

et al. 2015

Polym. Adv. Technol.

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“…The structure and synthetic route to 1-(3-benzoyloxypropyl)-3,5,7,9,11,13,15-hepta(isobutyl)pentacyclo-[9.5.1.1 3,9 .1 5,15 .1 7,13 ]octasiloxane (nbPOSS) are shown in Figure 2. The synthesis of T 8 R 7 R' derivatives from partially condensed silsesquioxanes follows the same general reaction scheme where a partially condensed silsesquioxane R 7 Si 7 O 9 (OH) 3 reacts with chloro-or alkoxysilane, often in the presence of base, such as NEt 3 . The partially condensed trisilanol species have been known since 1965 (30).…”

Section: Methodsmentioning

confidence: 99%

“…Many of the reported studies focused on applications of silsesquioxanes which were often used as hybrid nanofillers and nanomodifiers (1)(2)(3)(4)(5)(6)(7)(8). The possibility of specific silsesquioxane functionalization caused a significant increase in its application in both thermoplastic and thermosetting polymers (8)(9)(10)(11).…”

Section: Introductionmentioning

confidence: 99%

“…The main assumption was to take advantage of good miscibility of silsesquioxanes that contain isobutyl groups to increase nucleating agent efficiency. In the study, the nucleation efficiency of sodium benzoate (NaBz) and novel1 -(3-benzoyloxypropyl)-3,5,7,9,11,13,15-hepta(isobutyl) pentacyclo-[9.5.1.1 3,9 .1 5,15 .1 7,13 ]octasiloxane (nbPOSS) was investigated. Moreover, the synthesis and characterization of novel nanomodifier were presented.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Influence of Sodium Benzoate Silsesquioxane Based Nucleating Agent on Thermal and Mechanical Properties of Isotactic Polypropylene

Barczewski

Dudziec

Dobrzyńska‐Mizera

et al. 2014

Journal of Macromolecular Science, Part A

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Novel sodium benzoate modified silsesquioxane (nbPOSS) for isotactic polypropylene modification was synthesized and characterized. The influence of the novel silsesqioxane based nucleating agent on mechanical and thermal properties of commercial isotactic polypropylene was observed and compared with sodium benzoate. The mechanical investigations revealed changes in polymeric structure indicating that nucleating process had occurred. Synthetic route of 1-(3-benzoyloxypropyl)-3, 5,7,9,11,13, 15-hepta(isobutyl)pentacyclo-[9.5.1.1 3,9 .1 5,15 .1 7,13 ]octasiloxane and its characterization were presented.

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“…POSS has a nanosized, cage-shaped and three-dimensional structure, which can be represented by the formula R n (SiO 1.5 ) n , where n (n≥6) is the number of silicon atoms and R is a hydrogen atom or an organic functional group including alkyl, alkylene, aryl, arylene, or epoxide unit [5][6][7][8][9][10] . In this special structure, the (SiO 1.5 ) n is an inorganic core, which can serve to provide molecular reinforcement, and the attaching organic groups (R n ) on the inorganic core can serve to improve compatibility with polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of a novel polyhedral oligomeric silsesquioxanes containing phosphorus and boron

Wang

Xiong

Liang

et al. 2016

Inorganic and Nano-Metal Chemistry

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In this paper, the authors synthesized a novel polyhedral oligomeric silsesquioxanes containing phosphorus and boron (PB-POSS). First, the 3-glycidoxy-propyltrimethoxy silane (KH560) was reacted with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) to prepare silane coupling agent containing DOPO (DOPO-KH560). Then this product was used to synthesize polyhedral oligomeric silsesquioxanes containing phosphorus (DOPO-POSS) by a hydrolytic condensation. Finally, the PB-POSS was prepared by the reaction between DOPO-POSS and boric acid. The chemical structure and thermal properties of PB-POSS were characterized by Fourier transform infrared (FT-IR), nuclear magnetic resonance ( 13 C NMR and 29 Si NMR), thermal gravimetric analysis (TGA) and differential scanning calorimeter (DSC). The experiment results indicate that the synthesis of PB-POSS is successful, and the resulted compound has high thermal stability.

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Nano-hybrid polymers containing polyhedral oligosilsesquioxanes (POSS)

Cited by 26 publications

References 0 publications

Synthesis and morphology of rigid polyurethane foams with POSS as pendant groups or chemical crosslinks

Synthesis and morphology of rigid polyurethane foams with POSS as pendant groups or chemical crosslinks

Synthesis and Influence of Sodium Benzoate Silsesquioxane Based Nucleating Agent on Thermal and Mechanical Properties of Isotactic Polypropylene

Synthesis and characterization of a novel polyhedral oligomeric silsesquioxanes containing phosphorus and boron

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