A novel method for the determination of diffusion coefficients in amorphous poly(3-hydroxybutyrate)

Polyák, Péter; Szemerszki, Dóra; Benke, Henrik Christopher; Pukánszky, Béla

doi:10.1016/j.polymertesting.2017.08.037

Cited by 7 publications

(2 citation statements)

References 38 publications

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“…of the nanocomposites based on the CMG-R content and atmospheric temperature. Many studies have been conducted on the moisture absorption behavior of polymer materials [ 5 , 19 , 27 , 28 , 29 ]. Fick’s 2nd Law, a diffusion equation, can be derived from Fick’s 1st Law and the Law of Conservation of Mass.…”

Section: Resultsmentioning

confidence: 99%

Hygroscopic Behavior of Polypropylene Nanocomposites Filled with Graphene Functionalized by Alkylated Chains

Kang

Kim

Shin³

et al. 2022

Nanomaterials

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Owing to stringent international environmental and fuel efficiency requirements for lightweight automotive systems, polymer composites have attracted widespread attention. Polypropylene (PP) is a widely employed commercial polymer because of its lightweight and low cost. In this study, PP nanocomposites were fabricated to reduce the moisture absorption of PP composites in automotive headlamp housings. Alkylated chemically modified graphene (CMG-R) was synthesized to reduce the surface hydrophilicity of graphene and increase compatibility with the PP matrix. Fourier transform-infrared spectroscopy and scanning electron microscopy were performed to analyze the nanofillers. X-ray diffraction was performed to determine the interlayer spacing of the nanofiller resulting from surface treatment. Differential scanning calorimetry was used to analyze the crystallinity of the nanocomposites. The results indicated that the improved hydrophobicity of the nanofiller due to alkylation reduced the maximum moisture absorption of the PP nanocomposites by 15% compared to PP composites. The findings of this study are useful for reducing fogging in automotive headlamps.

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Section: Resultsmentioning

confidence: 99%

Hygroscopic Behavior of Polypropylene Nanocomposites Filled with Graphene Functionalized by Alkylated Chains

Kang

Kim

Shin³

et al. 2022

Nanomaterials

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“…At specific (t) interval time, the specimens were removed from the water, squeezed on an absorbent paper and weighed to have, at each (t) times, the wet mass m(t). The end of the experiment was noted when an equilibrium weight, m eq , of the m(t) values was obtained [19] [20] [21].…”

Section: Water Absorptionmentioning

confidence: 99%

Physical, Water Diffusion and Micro-Structural Analysis of “Canarium Schweinfurthii Engl”

Koungang

Ndapeu²,

Tchemou³

et al. 2020

MSA

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The purpose of this study is to determine the morphological, microstructural characteristics and water diffusion parameters of the Canarium schweinfurthii (CS) shellnut. This work is part of a vast project to valorize the above-mentioned cores for possible industrial use as charges in composites or abrasives materials. The study was based on the characterization of intrinsic physical characteristics of the coreshells scanning electron microscopic (SEM) observations desorption, adsorption and absorption kinetics. The water diffusion phenomenon was modeled and it appears that the Page model well predicted the kinetic of drying, absorption and adsorption. The effective diffusion coefficient and the energy of activation were calculated at three isothermal temperatures (50˚C, 70˚C and 90˚C). There was a tendency for hysteresis in the sorption-desorption cycles. These results strongly predicted the possibility of using these products as a filler in composites, clay building materials and cement because of their high water diffusion stability on a macroscopic scale.

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Bubble Farming: Scalable Microcosms for Diatom Biofuel and the Next Green Revolution

Gordon

Merz

Gurke³

et al. 2019

Diatoms: Fundamentals and Applications

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A novel method for the determination of diffusion coefficients in amorphous poly(3-hydroxybutyrate)

Cited by 7 publications

References 38 publications

Hygroscopic Behavior of Polypropylene Nanocomposites Filled with Graphene Functionalized by Alkylated Chains

Hygroscopic Behavior of Polypropylene Nanocomposites Filled with Graphene Functionalized by Alkylated Chains

Physical, Water Diffusion and Micro-Structural Analysis of “Canarium Schweinfurthii Engl”

Bubble Farming: Scalable Microcosms for Diatom Biofuel and the Next Green Revolution

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