Modification of mechanical properties in polymer nanocomposites by the incorporation of specific self-complementary hydrogen bonding interactions

Neikirk, Colin; Chung, Jaewoo; Priestley, Rodney D.

doi:10.1016/j.polymer.2015.10.019

Cited by 10 publications

(25 citation statements)

References 51 publications

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“…The silica nanoparticles were functionalized by reacting UPy with the hydroxyl groups on dispersed nanoparticles in DMF, using dibutyltindilaurate as a catalyst . Surface functionality was confirmed by FTIR spectroscopy and TGA . FTIR spectroscopy showed that the isocyanate absorbance peak at 2275 cm 2 disappeared completely after the reaction of UPy with silica nanoparticles while the other peaks associated with UPy were still present.…”

Section: Methodsmentioning

confidence: 99%

“…However, controlling nanoparticle dispersion and aggregate morphology inside the polymer matrix is a major challenge in order to achieve desirable properties. Employing strong supramolecular interactions between nanoparticles and polymer chains not only helps to effectively transfer stresses at the interface between the polymer matrix and the nanoparticle inclusions but also improves the dispersion of the nanoparticles . The UPy multiple hydrogen bonding units developed by Sijbesma et al .…”

Section: Introductionmentioning

confidence: 99%

“…The UPy multiple hydrogen bonding units developed by Sijbesma et al . is one of the supramolecular binding groups that can improve matrix−filler interactions and promote the mechanical properties and thus the foamability of supramolecular systems …”

Section: Introductionmentioning

confidence: 99%

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Effect of matrix−nanoparticle supramolecular interactions on the morphology and mechanical properties of polymer foams

Jamalpour

Ghaffarian

Jangizehi

2018

Polymer International

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In this study, we report the fabrication of supramolecular polymer nanocomposite foams with a uniform cell structure, high cell density and high expansion ratio using a soft matrix of poly(methyl acrylate-co-2-hydroxyethyl methacrylate) and silica nanoparticle fillers, both functionalized with ureido-pyrimidinone (UPy) supramolecular groups. Microcellular structures were formed using a batch foaming process at 90 ∘ C under a 9 MPa nitrogen atmosphere. Nanocomposites were characterized and compared before and after the foaming process to investigate the effect of supramolecular interactions on the thermomechanical properties and morphology of the foams. TEM images revealed that while strong inter-filler supramolecular interactions do not have a positive effect on their dispersion state, matrix−filler interactions derived from hydrogen bonding UPy motifs result in a rather uniform distribution of nanoparticles. Competing filler−filler and matrix−filler supramolecular interactions can be balanced and optimized by adjusting UPy populations along the chains and on the surface of nanoparticles. At a given chain functionality, increasing the nanoparticle loading up to an optimum concentration improves the mechanical properties and formability of the system. Above such concentration strong interactions between fillers, which are not compensated by the matrix, result in large aggregates and consequently undermine the material performance. Supramolecular polymer foams illustrate a similar thermal and viscoelastic behavior to that of neat samples but after foaming, due to the formation of a cellular structure and rearrangement or dissociation of UPy dimers under the foaming conditions, the elastic modulus is reduced.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of matrix−nanoparticle supramolecular interactions on the morphology and mechanical properties of polymer foams

Jamalpour

Ghaffarian

Jangizehi

2018

Polymer International

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“…From our previous study 3 , we know that nanoparticle films can display lower sound velocities than their bulk constituent material, depending on the contact stiffness between the nanoparticles 4 , 14 . This was unexpected behavior, since polymer nanocomposites are generally stiffer than their constituent polymers 15 – 17 . However, the effect depends on the density of the filler of macroscopic and micrometer-sized composite particles 18 , 19 .…”

Section: Introductionmentioning

confidence: 98%

Robustness of elastic properties in polymer nanocomposite films examined over the full volume fraction range

Alonso-Redondo

Belliard

Rolle

et al. 2018

Sci Rep

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Polymers with nanoparticle inclusions are attractive materials because physical properties can be tuned by varying size and volume fraction range. However, elastic behavior can degrade at higher inclusion fractions when particle-particle contacts become important, and sophisticated measurement techniques are required to study this crossover. Here, we report on the mechanical properties of materials with BaTiO3 nanoparticles (diameters < 10 nm) in a polymer (poly(methyl methacrylate)) matrix, deposited as films in different thickness ranges. Two well-known techniques, time and frequency domain Brillouin light scattering, were employed to probe the composition dependence of their elastic modulus. The time domain experiment revealed the biphasic state of the system at the highest particle volume fraction, whereas frequency domain Brillouin scattering provided comprehensive information on ancillary variables such as refractive index and directionality. Both techniques prove complementary, and can in particular be used to probe the susceptibility of elastic properties in polymer nanocomposites to aging.

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“…The demand comes from their existing features including light weight, low cost and extraordinary mechanical properties. [12][13][14] However, k of common synthetic polymers, including polyethylene terephthalate (PET), low density polyethylene (LD-PE), polypropylene (PP) and poly (methyl methacrylate) (PMMA), falls in the range of 0.1-0.3 W/m•K. [15][16][17] Attempts have been made to enhance k of polymers.…”

Section: Research Progress On High-thermal-conductivity Polymersmentioning

confidence: 99%

Thermal transport and thermal structural domain in microfibers

Zhu¹

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Modification of mechanical properties in polymer nanocomposites by the incorporation of specific self-complementary hydrogen bonding interactions

Cited by 10 publications

References 51 publications

Effect of matrix−nanoparticle supramolecular interactions on the morphology and mechanical properties of polymer foams

Effect of matrix−nanoparticle supramolecular interactions on the morphology and mechanical properties of polymer foams

Robustness of elastic properties in polymer nanocomposite films examined over the full volume fraction range

Thermal transport and thermal structural domain in microfibers

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