Supramolecular interactions involving fluoroaryl groups in hybrid blends of polylactide and ladder polysilsesquioxanes

Kowalewska, Anna; Herc, Agata S.; Bojda, Joanna; Palusiak, Marcin; Markiewicz, Ewa; Ławniczak, Paweł; Nowacka, Maria; Soltysiak, Joanna; Różański, Artur; Piórkowska, Ewa

doi:10.1016/j.polymertesting.2020.107033

Cited by 8 publications

(14 citation statements)

References 63 publications

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“…The application of linear double strand polysilsesquioxanes as modifiers in PLA/PMMA blends is related to our previous works on PLA/LPSQ-R systems [44][45][46]. Linear polysilsesquioxanes have a specific double strand backbone, which makes them much less flexible than linear polysiloxanes and prevents chain coiling.…”

Section: Phase Distribution In the Pla/pmma Mixture And Ternary Blendmentioning

confidence: 87%

“…Surface free energy was estimated for the compression moulded 0.5 mm thick films by contact-angle measurements (sessile drop technique) at the film-air interface, as described earlier [46], using deionized water and glycerol (Chempur, Piekary Slaskie, Poland; pure p.a., anhydrous) as the reference liquids. Static and advancing contact angles of sessile droplets of reference liquids at the film-air interface were measured right after the deposition at RT with a Ramé-Hart NRL contact-angle goniometer (Ramé-Hart Instrument Co., Succasunna, NJ, USA) equipped with a video camera JVC KYF 70B (Yokohama, Japan) and drop-shape analysis software ("Drop", version 2.1, written and authored by Dr. hab.…”

Section: Analytic Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…We have recently found that linear, ladder-like polysilsesquioxanes (LPSQ-R) (Scheme 1) may be applied as interesting modifiers of PLA [44][45][46][47]. LPSQ-R are amorphous substances of low glass transition temperatures that are partially miscible with PLA [44][45][46]. Their net effect may be attributed to plasticization and dispersion in PLA matrix and supramolecular interactions that involve side functional groups R [6,[44][45][46].…”

Section: Introductionmentioning

confidence: 99%

“…LPSQ-R are amorphous substances of low glass transition temperatures that are partially miscible with PLA [44][45][46]. Their net effect may be attributed to plasticization and dispersion in PLA matrix and supramolecular interactions that involve side functional groups R [6,[44][45][46]. In this report, we focus on the influence of selected LPSQ-R on PLA/PMMA (90:10) blend.…”

Section: Introductionmentioning

confidence: 99%

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Phase Structure and Properties of Ternary Polylactide/Poly(methyl methacrylate)/Polysilsesquioxane Blends

et al. 2021

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Ternary blends of polylactide (PLA, 90 wt.%) and poly(methyl methacrylate) (PMMA, 10 wt.%) with functionalized polysilsesquioxanes (LPSQ-R) were obtained by solution blending. R groups in LPSQ containing hydroxyethyl (LPSQ-OH), methylglycolic (LPSQ-COOMe) and pentafluorophenyl (LPSQ-F5) moieties of different chemical properties were designed to modify PLA blends with PMMA. The effect of the type of LPSQ-R and their content, 1–3 wt.%, on the structure of the blends was studied with scanning electron microscopy (SEM) combined with energy dispersive spectroscopy (SEM-EDS), dynamic mechanical thermal analysis (DMTA) and Raman spectroscopy. Differential scanning calorimetry (DSC) and tensile tests also showed various effects of LPSQ-R on the thermal and mechanical properties of the blends. Depth-sensing indentation was used to resolve spatially the micro- and nano-scale mechanical properties (hardness and elastic behaviour) of the blends. The results showed clearly that LPSQ-R modulate the structure and properties of the blends.

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Section: Phase Distribution In the Pla/pmma Mixture And Ternary Blendmentioning

confidence: 87%

Section: Analytic Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phase Structure and Properties of Ternary Polylactide/Poly(methyl methacrylate)/Polysilsesquioxane Blends

et al. 2021

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Structural effects of TiO2 nanoparticles in photocurable ladder-like polysilsesquioxane nanocomposites

Dirè

Callone

Ceccato

et al. 2023

J Sol-Gel Sci Technol

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Ladder-like polysilsesquioxanes (LPSQs) are characterized by a double-stranded siloxane backbone, whose chemical and structural properties depend on both the synthesis parameters and the nature of the organic side-chains. In the case of ladder-like (methacryloxypropyl) polysilsesquioxanes (LPMASQ), polymer matrices can be produced by exploiting the presence of photocurable methacrylate groups. Consequently, they can be used to prepare functional nanocomposites (NCs), either by blending with organic polymers such as polybutadiene or exploiting the inorganic fillers’ dispersion. Since the properties of LPMASQ-based NCs are strongly related to their structure, the structural changes of polymerized LPMASQ were investigated upon addition of low loadings of TiO2 nanoparticles (up to 3 wt%) by solid state nuclear magnetic resonance and X-ray diffraction. The filler addition leads to the reduction of the polymerization capacity of the LPMASQ organic side-chains. Moreover, a different organization of ladder chains has been highlighted, ascribable to the increase in fully condensed linear ladder units at the expenses of folded chains and defective structures. The methodological approach here adopted can be extended to other composite systems and may help to describe the properties at the filler-matrix interface, offering valuable hints for a better design of these materials. Graphical Abstract

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Multiple covalent/hydrogen bonds bridging electron transfer in polymeric carbon nitride for efficient photocatalytic H2O2 production

Zhou,

Shan,

et al. 2024

Chemical Engineering Journal

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Supramolecular interactions involving fluoroaryl groups in hybrid blends of polylactide and ladder polysilsesquioxanes

Cited by 8 publications

References 63 publications

Phase Structure and Properties of Ternary Polylactide/Poly(methyl methacrylate)/Polysilsesquioxane Blends

Phase Structure and Properties of Ternary Polylactide/Poly(methyl methacrylate)/Polysilsesquioxane Blends

Structural effects of TiO2 nanoparticles in photocurable ladder-like polysilsesquioxane nanocomposites

Multiple covalent/hydrogen bonds bridging electron transfer in polymeric carbon nitride for efficient photocatalytic H2O2 production

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