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Revisiting the crystallization of poly(2-alkyl-2-oxazoline)s Ghent University
Stress-induced amorphization triggers deformation in the lithospheric mantle University of Antwerp
The mechanical properties of olivine-rich rocks are key to determining the mechanical coupling between Earth's lithosphere and asthenosphere. In crystalline materials, the motion of crystal defects is fundamental to plastic flow(1-4.) However, because the main constituent of olivine-rich rocks does not have enough slip systems, additional deformation mechanisms are needed to satisfy strain conditions. Experimental studies have suggested a ...
THERMOPHYSICAL PROPERTIES OF FILMS PREPARED USING NON-IRRADIATED AND IRRADIATED POTATO STARCH AND POTATO STARCH – SURFACTANT SYSTEMS Vrije Universiteit Brussel
Radiation treatment might be adopted for improvement of the properties of the films formed using starch and composition of starch with surfactants. At present the influence of gamma irradiation on thermophysical properties of the films formed in potato starch - glycerol and potato starch - glycerol - surfactant systems were examined by DMA and DSC methods and the results were related to the content of the volatile fraction in the films.
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Phase separation in polymer blend thin films studied by differential AC chip calorimetry Vrije Universiteit Brussel
AC chip calorimetry is used to study the phase separation behavior of 100 nm thin poly(vinyl methyl ether)/poly(styrene) (PVME/PS) blend films. Using the on-chip heaters, very short (10 MS-10 S) temperature jumps into the temperature window of phase separation are applied, simulating laser heating induced patterning. These temperature pulses produce a measurable shift in the glass transition temperature, evidencing phase separation. The effect ...
Deposition Kinetics and Thermal Properties of Atmospheric Plasma Deposited Methacrylate-Like Films Vrije Universiteit Brussel
Allyl methacrylate (AMA), methyl methacrylate (MMA), and propyl isobutyrate (PiB) are plasma deposited at ambient temperature in an atmospheric DBD reactor to assess the effect of precursor carbon double bond unsaturations. The specific plasma deposition rate (k0) as a function of the Yasuda factor (Yf) is quantified empirically by: k0 = b (1 − exp(–a Yf/b)). Fourier transform infrared analysis indicates a loss of carbonyl functionalities with ...
Deconstructing Oligomer Distributions: Discrete Species and Artificial Distributions Hasselt University
The separation of an oligo(methyl acrylate) distribution, obtained from reversible addition–fragmentation chain transfer (RAFT) polymerization, in a discrete (dispersity=1) oligomeric library (degree of polymerization between 1 and 22) is presented. The properties of this library in terms of diffusivity, glass transition temperature, and viscosity are determined, filling a significant knowledge gap associated with these materials. The obtained ...
Freeze-drying qualities and state diagram of pulp and peel freeze-dried dragon fruits (Hylocereus spp.) Ghent University
Freeze-drying has been proposed to preserve nutritional values and colour of foodstuff. Moreover, few studies disrobe the influence of freeze-drying on the quality characteristic of tropical fruit, like dragon fruit. In this work, freeze-drying characteristics, vitamin C, betacyanins content, L*, a* and b* colour parameters and state diagram of pulp and peel of white-flesh (Hylocereus undatus) and red-flesh (Hylocereus polyrhizus) dragon fruits ...
Glass-formation and corrosion properties of Fe-Cr-Mo-C-B glassy ribbons with low Cr content Hasselt University
The effect of low amounts of Cr on glass forming ability and corrosion behavior of Fe(65-x)CrxMo14C15B6 (x = 0, 2, 4, 6, 8,10 at.%) ribbons have been studied. It was found that the reduced glass transition temperature (T-rg) do not change significantly with Cr content. The glass forming ability (GFA) of this system is evaluated by the gamma(m), delta and omega parameters and the alloys containing 4 and 6 at.% were found to be the best glass ...
Temperature-dependent behaviour of glass/ionomer laminates: preliminary test results Ghent University
For this research, torsion tests and three-point bending tests were executed on glass/ionomer laminates under controlled temperature (5 C to 65 C) and relative humidity (50%) conditions. This article presents some preliminary test results. The torsion tests showed for instance that the torsion stiffness changes most around the glass transition temperature. At higher temperatures, a less changing, lower torsional stiffness is noticed much faster. ...