Thermal degradation of phenolics and their carbon fiber derived composites: a feasible protocol to assess the heat capacity as a function of temperature through the use of common DSC and TGA analysis

Author(s):  
Maurizio Natali ◽  
Luigi Torre ◽  
Ivan Puri ◽  
Marco Rallini
Author(s):  
Y. Athulya Wickramasingha ◽  
Bhagya Dharmasiri ◽  
James D. Randall ◽  
Yanting Yin ◽  
Gunther G. Andersson ◽  
...  

2013 ◽  
Vol 28 (2) ◽  
pp. 265-274 ◽  
Author(s):  
Natassia L Batista ◽  
Michelle Leali Costa ◽  
Koshun Iha ◽  
Edson C Botelho

2015 ◽  
Vol 76 (3) ◽  
Author(s):  
Mimi Azlina Abu Bakar ◽  
Sahrim Ahmad ◽  
Salmiah Kasolang ◽  
Mohamad Ali Ahmad ◽  
Nik Roselina Nik Roseley ◽  
...  

Toughened epoxies reinforced by hybrid of kenaf/carbon fiber, untreated and treated, with the addition of liquid epoxidized natural rubber (LENR), were tested for their water absorption and thermal degradation. Water absorption testing was conducted based on ASTM D1037 to study the effects of kenaf fibre and carbon fibre on water uptake property. In the thermal analysis, the thermal degradation of the specimen was investigated towards heat. The test used a termogravimetric analysis machine, model Mettler Toledo-TGA, at temperature range of 50 OC to 350 OC with an increment of 10 OC/min where the results showed the decreasing of degradation temperature when the treated fiber was used. The results also showed that the percentage of water absorptions for composites with the addition of LENR were lower compared to those of composites without LENR. 


2021 ◽  
Vol 37 (6) ◽  
pp. 1496-1500
Author(s):  
Narendra S. Joshi ◽  
Govinda P. Waghulde ◽  
Gaurav R. Gupta

Edible vegetable oils were gelled by using N-(2-aminoethyl)-oleamide. Oils in their free state were subjected to differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) analysis. The gels of these oils were prepared by using N-(2-aminoethyl)-oleamide as gelator and similar thermal analysis of the gels was carried out. The thermal analysis data obtained was used to determine specific heat capacity at constant pressure (Cp). The values were compared with the reported values of heat capacities. It is observed that the thermal properties and transitions of oils and gels, specific heat capacity is helpful parameter to understand the fundamentals of gels and gelation strategies.


2019 ◽  
Vol 8 (2) ◽  
pp. 5616-5621

There is a wide scope to develop suitable hybrid combination for making Fiber Reinforced Polymer (FRP) to utilize the properties of both natural and synthetic fibers. Economic and environmental reasons justify the use of natural fiber in place of synthetic fiber composite. Thermal stability is one of the important properties for the FRP panel in the applications such as structural panels/roof panels, cold storage and air conditioned ducts of building. The aim of this paper is to investigate thermal properties of hybrid FRP made of Jute, Flax, Sisal and Hemp in combination with kevlar-29. Composite wall conductivity measurement, DSC/TGA technique are used to study thermal conductivity, thermal stability, change in specific heat capacity, thermal degradation. All the panels showed lower thermal conductivity of less than 1 W/m 0C; however the flax and hemp panels had lowest thermal conductivity of around 0.45 W/m0C. DSC thermographs indicated broad exotherm and major changes in specific heat capacity at 200 0C for all panels. In addition, TGA technique showed main weight loss around 30%-51% of panels around 210 0C. Thus the thermal properties of all panels were stable till 200 0C. Thermogravimetric analysis of F- FRP shows thermal stability at lower range of temperature while in H- FRP thermal degradation occurs in two steps around 260 0C and 410 0C with the wt. loss of 53.72% and 26.79% respectively


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