scholarly journals Thermal Degradation Behavior of Epoxy Resin Containing Modified Carbon Nanotubes

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3332
Author(s):  
Xiaohui Bao ◽  
Fangyi Wu ◽  
Jiangbo Wang
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Degradation ◽  
Heat Release ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Degradation Process ◽  
Degradation Behavior ◽  
Pure Epoxy ◽  
Thermal Degradation Behavior ◽  
Thermal Degradation Process

Via the surface-grafting of carbon nanotubes (CNTs) with a silicon-containing flame retardant (PMDA), a novel flame retardant CNTs-PMDA was synthesized. The flame retardancy was tested by cone calorimeter. Compared with pure epoxy resin, the total heat release (THR) and peak heat release rate (PHRR) of epoxy resin containing CNTs-PMDA were significantly reduced, by 44.6% and 24.6%, respectively. Furthermore, thermal degradation behavior of epoxy resin based composite was studied by the thermogravimetric analysis with differences in heating rates. The kinetic parameters of the thermal degradation for epoxy resin composites were evaluated by the Kissinger method and Flynn-Wall-Ozawa method. The results suggested that activation energy values of epoxy resin containing CNTs-PMDA in thermal degradation process were higher than those of pure epoxy resin in the final stage of the thermal degradation process, which was closely related to the final formation of char layer residues. Finally, the results from Dynamic mechanical thermal analysis (DMTA) and Scanning electron microscopy (SEM) measurements exhibited that the functionalization of CNTs with PMDA obviously improved the dispersion of CNTs in the epoxy resin matrix.

scholarly journals Thermal degradation process of polysulfone aramid fiber

2014 ◽  
Vol 18 (5) ◽  
pp. 1637-1641 ◽  
Author(s):  
Fang-Long Zhu ◽  
Qian-Qian Feng ◽  
Qun Xin ◽  
Yu Zhou
Keyword(s):  
Thermal Degradation ◽  
Degradation Process ◽  
Aramid Fiber ◽  
Degradation Behavior ◽  
Heating Rates ◽  
Degradation Temperature ◽  
Mass Losses ◽  
Thermal Degradation Behavior ◽  
Thermal Degradation Process ◽  
Kinetics Of

Polysulfone aramid fiber is one kind of high temperature fibers. In the paper, thermal degradation behavior and kinetics of polysulfone aramid fiber were investigated by thermogravimetric analysis and differential thermogravimetric at different heating rates under nitrogen and air, respectively. The experimental results show that its initial degradation temperature is 375?C in nitrogen and 410?C in air at heating rate of 10 K/min. When temperature went to 800?C, the fiber loses all mass in air. The mass losses in the stage showed that degradation of polysulfone aramid occurs in two-step process as could be concluded by the presence of two distinct exothermic peaks in differential thermogravimetric curves.

The Effect of Intumescent Flame Retardant Contained Microencapsulated Red Phosphorus on the Flame Retardance and Thermal Degradation Behaviour of Epoxy Resin

2011 ◽  
Vol 197-198 ◽  
pp. 1167-1170
Author(s):  
Zhi Ping Wu ◽  
Yun Chu Hu ◽  
Mei Qin Chen
Keyword(s):  
Activation Energy ◽  
Thermal Degradation ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Flame Retardants ◽  
Degradation Process ◽  
Intumescent Flame Retardant ◽  
Flame Retardance ◽  
Red Phosphorus ◽  
Degradation Behaviour

The effect of intumescent flame retardant (IFR) contained microencapsulated red phosphorus on the flame retardance of E-44 epoxy resin (EP) was studied. The test results indicated that good flame retardancy can be realized when epoxy resin treated with 30% IFR. Thermogravimetric analysis showed that the charring amount at high temperature of EP can increase substantially when IFR was incorporated. In order to further explain this phenomenon, Dolye integration method of thermal degradation dynamics was employed to study the thermal degradation process of EP treated with IFR based on the microencapsulated red phosphrous according to the thermal gravimetry analysis results.The activation energy and reactor order of different thermal degradation stages were obtained. The results of thermal degradation dynamics implied the intumescent flame retardants can improve the flame retardance of the epoxy resin through decrease the degradation speed and increase the activation energy of the second thermal degradation stage.

Comparative Study of Thermal Degradation Behavior of High Char Yield Phenolic Resin and Commercial Resin

2012 ◽  
Vol 500 ◽  
pp. 94-97
Author(s):  
Zhi Qin Chen ◽  
Wei Jun Zeng ◽  
Yang Fei Chen ◽  
Wen Kui Li ◽  
Hong Bo Liu
Keyword(s):  
Thermal Degradation ◽  
Phenolic Resin ◽  
Degradation Process ◽  
Char Yield ◽  
Degradation Behavior ◽  
Commercial Resin ◽  
Thermal Degradation Behavior ◽  
Nmr Techniques ◽  
Specific Reactions ◽  
C Nmr

The thermal degradation behavior of high char yield phenolic resin (PF1.2) synthesized by us was investigated, in comparison with that of commercial resin (PF1.5), using TGA and13C-NMR techniques. It was found that the degradation process of PF1.2behaved very similar to that of PF1.5during heat treatment up to 700 °C under N2atmosphere, but resulted in a somewhat different extent of some specific reactions. That was, although the reactions occurring up to 700 °C were dominated by crosslinking and/or polyaromatization, fewer methyl bonds from breaking of methylene bridges were formed in PF1.2than in PF1.5. As a consequence, a higher char yield of 73.8% of PF1.2than that of PF1.5(57.5%) up to 700 °C under N2atmosphere was attached, with better thermal properties.

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