Differential scanning calorimetry

The influence of the black seed oil modified epoxy resin (EBSO)/monomer 3,4-epoxycyclohexylmethyl 3,4- epoxycyclohexane carboxylate (BCDE) weight ratio in the coatings based on the compounds and photoinitiator triarylsulfonium hexafluoroantimonate (TAS) on thermal properties of photocrosslinked coatings have been studied. The chemical structure of investigated UV-cured coatings was characterized by IR spectrometric analysis. Their thermogravimetric (TG) and differential scanning calorimetry (DSC) behavior were determined by TG and DSC analysis, respectively.

9p dianmotminh02 03-05-2024 3 1   Download

The 3D printing PMMA/ZrO2 filaments with a diameter of 1.75±0.05 mm were fabricated by using a single-screw extruder at temperatures of four heating zones of 190, 200, 210, and 210°C. Testing samples were prepared from the extruded filaments by using a fusion deposition modeling 3D printer and a Haake MiniJet piston injection molding machine. Fourier transform infrared spectroscopy, mechanical properties, field emission scanning electron microscopy (FESEM), differential scanning calorimetry, and thermogravimetric analysis of the filaments were investigated.

9p dianmotminh02 03-05-2024 1 1   Download

Ebook "Porous polymeric bioresorbable scaffolds for tissue engineering" discusses the manipulation of polymer chemical structure and composition to tune scaffold physical properties, and optimization of scaffold 3D architecture by a smart use of both fabrication techniques. The multidisciplinary nature of this research is imperative in pursuing the challenge of tissue regeneration successfully.

132p manmanthanhla0201 26-02-2024 1 1   Download

Ebook "An introduction to polymer physics" covering a wide range of topics within the field of polymer physics, the book begins with a brief history of the development of synthetic polymers and an overview of the methods of polymerisation and processing. In the following chapter, David Bower describes important experimental techniques used in the study of polymers.

465p loivantrinh 29-10-2023 3 2   Download

Part 1 of ebook "Polymer synthesis: Theory and practice - Fundamentals, methods, experiments" provides readers with contents including: introduction; methods and techniques for synthesis, characterization, processing, and modification of polymers; correlations of structure and morphology with the properties of polymers;...

176p dangsovu 20-10-2023 5 3   Download

Selenium (Se) is an essential trace element, and its deficiency in the humans leads to increase the risk of various diseases, such as cancer and heart diseases. The objective of this study was to investigate the influence of biofield energy treatment on the physical and thermal properties of the selenium powder. The selenium powder was divided into two parts denoted as control and treated.

6p viisac 23-09-2023 2 1   Download

This project investigates the use of free radical initiators in the recycling of post consumer recycled high density polyethylene using reactive extrusion. Both molecular and rheological characterisation of recycled and reprocessed materials was carried out and this was followed by tensile testing of the modified materials to satisfy end use applications such as packaging and drainage piping.

154p runthenight07 01-03-2023 4 2   Download

Similar to thermal analysis measurements such as differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA) and thermo-mechanical analysis (TMA), dynamic mechanical thermal analysis (DMTA) is also a technique that provided information on the thermo-mechanical properties of polymeric materials.

12p vidudley 20-02-2023 5 2   Download

The aim of this research project "Development of polylactic acid-polyhydroxybutyrate blends for packaging applications" is to examine the effect of temperature and concentration on the rheological and thermal properties of PLA/PHB blends as well as recommending the optimum composition of the PLA/PHB blends for use in packaging applications.

76p runthenight04 02-02-2023 4 1   Download

Salt hydrates, classified as inorganic phase change materials, are used in thermal energy storage (TES) systems. Due to their superior properties such as higher thermal conductivity and better thermal energy storage density, non-flammability and availability in wide temperature ranges at a reasonable cost than organic PCMs, salt hydrates are preferable PCMs.

7p vicedric 08-02-2023 7 3   Download

Polyurethane foams have good shock-absorbing properties. This article discusses the study of the physical, dynamic analysis, and microstructure of filled polyurethane foams (PUR). We used mineral fillings nanoparticles of titanium dioxide (TiO2 ) and calcium carbonate (C1) to support and strengthen the foam cell structure to develop shock absorption and thermal resistance properties. Dynamic mechanical analysis (DMA) and compression tests compared the mechanic characterization results with different modelling approaches.

25p lyhuyenthu 31-01-2023 6 2   Download

The identification of the defects and secondary phases which significantly affect the material properties are of crucial importance. In this study, a systematic structure examination of PbTiO3 and cobalt doped PbTiO3 powder ceramics was carried out. X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), Raman, and electron paramagnetic resonance (EPR) spectroscopies were applied along with nonsimultaneous thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).

9p lyhuyenthu 31-01-2023 8 2   Download

Coordination-driven self-assembly of nickel (II) ions with equimolar amounts of 1, 10 phenanthroline, and benzoic acid was used to create homonuclear nickel (II) MOF-type supramolecule. Single crystal X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, photoluminescence measurement, FT-IR, UV-visible spectroscopy, and nitrogen physisorption measurement were used to characterize the compound. The single crystal X-ray diffraction study reveals that the synthesized compound is twodimensional with pores in the structure.

10p lyhuyenthu 31-01-2023 6 2   Download

In this study, single-side polypyrrole (PPy) coated conductive stretchable polyurethane (PU) / PPy composite films were synthesized by chemical oxidative method in the acetonitrile (ACN)/H2 O interface as a new alternative to two-side coated PU films which have already reported in the literature. One surface of the PU film was contacted with aqueous Py solution and the other surface with cerium ammonium nitrate (CAN) solution in ACN, so that only one surface of the film was coated with PPy and the resulting composite was named PU/PPy (PUP).

17p lyhuyenthu 31-01-2023 7 2   Download

Retrograded starch is known to be resistant to digestion. We used enzyme kinetic experiments to examine how retrogradation of starch affects amylolysis catalysed by porcine pancreatic amylase. Parallel studies employing differential scanning calorimetry, infra red spectroscopy, X-ray diffraction and NMR spectroscopy were performed to monitor changes in supramolecular structure of gelatinised starch as it becomes retrograded.

8p vihermione 06-01-2023 4 2   Download

Incorporation of therapeutic proteins in a matrix of sugar glass is known to enhance protein stability, yet protection is often lost when exposed to high relative humidity (RH). We hypothesized that especially in these conditions the use of binary glasses of a polysaccharide and disaccharide might yield advantages for protein stability.

7p vihermione 06-01-2023 5 2   Download

Differential scanning calorimetry was established for in-situ measurement ofthe transition temperatures of antibodies when adsorbed on hydrophobic interaction chromatography media. This method is also suitable for non-transparent media, which is an advantage over spectroscopic methods that cannot be used in many cases due to large background signals.

7p viginny 23-12-2022 5 3   Download

In this work, two series of composite materials based on unsaturated polyester (UPE) resin and coffee husk powder were fabricated by a hot pressing method using methyl ethyl ketone peroxide (MEKP) as an initiator. The gel time of UPE resin is 32  2 min with 0.5 wt % of MEKP was determined according to ASTM D2471. The differential scanning calorimetry (DSC) reveals that the curing process should be post-cured.

9p visherylsandber 28-06-2022 27 5   Download

The aim of this study was to evaluate the efficiency of 3 new polymers obtained by functionalization of a commercial poly(vinyl chloride) by grafting amino-alkyl and amino-aryl groups to extract some metal cations from aqueous solutions. A kinetic study of the extraction shows that the optimal duration of extraction was obtained with the polymer that has more chlorine atoms substituted by diethylenetriamine groups. The influence of metal extraction on the infrared spectra, differential scanning calorimetry diagrams, and X-ray diffraction of metal-loaded polymers was also studied.

12p langthannam 29-12-2021 13 0   Download

Crystallization processes of lipid matrices were characterized by X-ray diffractometry and differential scanning calorimetry. pDNA binding ability of SLNs and the stability of pDNA-SLN complexes with DNase I enzyme were also determined by gel electrophoresis. It was determined that all formulations became positively charged with DOTAP®R. They were able to bind DNA and were partially protective against enzyme degradation. Although additional studies are necessary, this study reveals the promising potential of this gene delivery system for gene therapy.

13p langthannam 29-12-2021 8 0   Download