Thermogravimetric characterization of ex situ polymethacrylate (EDMA‐co‐GMA) monoliths

Acquah, Caleb; Moy, Charles K.S.; Anwar, Mahmood; Ongkudon, Clarence M.

doi:10.1002/cjce.22781

Cited by 13 publications

(3 citation statements)

References 49 publications

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“…At higher speed rates, a heat mismatch occurs between the outer surface and the interior of the deformed polymer. Since the polymer's outer surface gets hotter than the inside section, fragmentation on the outer surface consists of at higher temperatures due to the increase in the heating rate 33 …”

Section: Resultsmentioning

confidence: 99%

Synthesis of novel functionalized methacrylate copolymers and their copolymerization kinetics, thermal stability, and biocidal properties

Erol

Güldiken

2021

J of Applied Polymer Sci

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In the first step of this study, 2‐[(methoxy‐1,3‐benzothiazole‐2‐yl)amino]‐2‐oxoethyl methacrylate (MBAOM) monomer was synthesized and characterized. Then, a series copolymers were obtained by free‐radical copolymerization method of MBAOM and glycidyl methacrylate, which is a commercial monomer at 65°C in 1,4‐dioxane solvent. Structural characterizations of synthesized monomer and copolymers were carried out using Fourier transform infrared spectrophotometer and nuclear magnetic resonance spectroscopy (1H and 13C‐NMR) instruments. The composition of the copolymers was estimated by elemental analysis. The thermal behaviors of all the polymers have been investigated using the differential scanning calorimetry and the thermogravimetric analysis. A kinetic study of the thermal decomposition of copolymers was investigated using thermogravimetric analyzer with non‐isothermal methods selected for analyzing solid‐state kinetics data. The activation energy (Ea) values were calculated via Kissinger and Ozawa models in a period of α = 0.10–0.80. Photostability of the copolymers was investigated. Also, the biological activity of the copolymers against different bacterial and fungal species has been investigated.

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Section: Resultsmentioning

confidence: 99%

Synthesis of novel functionalized methacrylate copolymers and their copolymerization kinetics, thermal stability, and biocidal properties

Erol

Güldiken

2021

J of Applied Polymer Sci

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“…The versatility of the DSC is vast and researchers apply it to assess: coal,() cjceass,() waste,() catalysts,() minerals,() cement,() ceramics,() alloys,() and polymers. () Applications include: gasification,() pyrolysis,() combustion,() adsorption,() desorption,() calcination,() dehydration,() thermal stability,() phase transitions,() phase diagrams,() polymer crystallization,() glass transition, curing time, and reaction kinetics …”

Section: Applicationsmentioning

confidence: 99%

Experimental methods in chemical engineering: Differential scanning calorimetry—DSC

et al. 2018

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Differential calorimetry assesses energy flow between a sample and its environment. The sample may be heated at a known heating rate (either constant or temperature modulated), or held in an isothermal environment or adiabatic environment depending on instrument and experimental design. The subset of differential calorimetry that deals with known heating or cooling rates is termed differential scanning calorimetry (DSC) and is a foundational technique to modern thermodynamics. It reports the heat flow versus temperature or time from which we calculate specific heat capacity at constant pressure, c P , enthalpy of fusion, and the heat of reaction. Moreover, it identifies how microstuctural properties evolve and thermal arrests-a characteristic of phase transitions. Heat-flux DSCs measure the temperature difference between a reference and a sample that sit on a thin two-dimensional plate. Power compensated DSCs heat reference material and the sample in independent furnaces while maintaining each at the same temperature. The Tian-Calvet DSC is similar to the heat-flux DSC, but minimizes error induced at high temperature with ring shaped thermopiles that surround the reference and the sample and in most designs incorporate the independent furnaces characteristic of heat flux DSC (three-dimensional heat flow probe). Convection and radiation energy leaks compromise accuracy above 600 • C, particularly for pan-style heat flux and power-compensated DSC, which are sensitive to heat transfer by conduction only. The Tian-Calvet DSC maximizes the signal-to-noise ratio by enveloping the sample and reference in the thermopile. Web of Science indexed 11 800 articles in 2016 and 2017 that mentioned DSC and assigned 789 to chemical engineering, which ranks it 5th after polymer science, material science, physical chemistry, and multi-disciplinary chemistry. A bibliometric analysis recognizes four research clusters: polymers and nano-composites, alloys and kinetics, nano-particles and drug delivery, and fibres.

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“…The use of polymer-based materials has unlimited applications from household products to manufacturing, biomedical, aerodynamic industries and even in the development of space craft's [1][2][3][4][5][6]. In the study of composite materials, the matrix is the component that binds the filler particles to form the new material.…”

Section: Introductionmentioning

confidence: 99%

Degassing Process Influence on Tensile Strength of Neat E132 Epoxy Polymeric Materials

Wong

Anwar

Debnath

et al. 2021

MSF

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During the composite’s fabrication process, one of the most common defect occurs is void. Numerous literatures have suggested that the presence of void negatively affect its mechanical properties and effective degassing process is one the solutions for such issue. In this study, experiments were carried out using neat E132 epoxy to investigate the effects of different degassing process (hot water, ultrasonic bath, and vacuum) on its tensile strength. The duration of its process was carried out from 5 – 9 minutes for hot water and ultrasonic bath where vacuum process was extended until 10 minutes to observed limiting behavior. It is found that the vacuum degassing method is the most effective. Vacuum degassing process displayed the least formation of bubble and micro voids even for 10 minutes. It is also revealed that vacuum degassing process resulted the highest average tensile strength at 48.8MPa. Such findings would facilitate the well bonded effective nanocomposite fabrication process.

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Thermogravimetric characterization of ex situ polymethacrylate (EDMA‐co‐GMA) monoliths

Cited by 13 publications

References 49 publications

Synthesis of novel functionalized methacrylate copolymers and their copolymerization kinetics, thermal stability, and biocidal properties

Synthesis of novel functionalized methacrylate copolymers and their copolymerization kinetics, thermal stability, and biocidal properties

Experimental methods in chemical engineering: Differential scanning calorimetry—DSC

Degassing Process Influence on Tensile Strength of Neat E132 Epoxy Polymeric Materials

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