Incompatible reaction for (3-4-epoxycyclohexane) methyl-3′-4′-epoxycyclohexyl-carboxylate (EEC) by calorimetric technology and theoretical kinetic model

Tong, Jingwei; Chen, Wei‐Chun; Tsai, Yun‐Ting; Cao, Yan; Chen, Jiann-Rong; Shu, Chi‐Min

doi:10.1007/s10973-014-3685-7

Cited by 14 publications

(5 citation statements)

References 35 publications

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“…For pure epoxy, there was a double-step process for thermally degrading in the air as shown in the black curve in Figure a. It is believed that the main loss with a maximum rate in the first stage is due to the decomposition of the epoxy network structure at 370 °C while leaving tiny amounts of char residue that is further degraded by thermal oxidation at around 420–540 °C in the second stage. , The thermal decomposition curves of epoxy-based composites were one step more than that of pure epoxy. It is attributed to the oxidative decomposition reaction of carbon fibers at around 540–900 °C .…”

Section: Resultsmentioning

confidence: 99%

Efficient Thermal Transport Highway Construction Within Epoxy Matrix via Hybrid Carbon Fibers and Alumina Particles

Wang

Chen

et al. 2020

ACS Omega

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Polymer composites with excellent thermal conductivity and superior mechanical strength are in high demand in the electrical engineering systems. However, achieving superior thermal conductivity and mechanical properties simultaneously at high loading of fillers will still be a challenging issue. In this work, a facile method was proposed to prepare the epoxy composite with carbon fibers (CFs) and alumina (Al 2 O 3 ). This CF and Al 2 O 3 hybrid structure can effectively reduce the interfacial thermal resistance between the matrix and the CFs. The thermal conductivity of epoxy composite with 6.4 wt % CFs and 74 wt % Al 2 O 3 hybrid filler reaches 3.84 W/(m K), which is increasing by 2096% compared with that of pure epoxy. Meanwhile, the epoxy composite still retains outstanding thermal stability and mechanical performance at high filler loading. A cost-effective avenue to prepare highly thermally conductive and superior mechanical properties of polymer-based composites may enable some prospective application in advanced thermal management.

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Section: Resultsmentioning

confidence: 99%

Efficient Thermal Transport Highway Construction Within Epoxy Matrix via Hybrid Carbon Fibers and Alumina Particles

Wang

Chen

et al. 2020

ACS Omega

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“…From the calculation of the Málek model, the average E a of EEC and EEC under UV radiation with two durations of one and two months was 95.50, 57.13, and 72.14 kJ/mol, respectively. According to the open literature, E a of EEC in Málek model is similar to E a which was provided in the reference 35 . Moreover, the results of EEC under prominent UV at different durations of one and two months were the same as the trends of E a which were gained by the FWO, Friedman, and ASTM E698–5 models, and the E a of EEC under prominent UV radiation for one month was the lowest among all the other samples.…”

Section: Resultsmentioning

confidence: 69%

“…Figure 6 illustrates the calculation of E a through FWO model for EEC and EEC irradiated for one and two months with UV. From the literature review 34 , 35 , we determined that α of the main reaction in TG test was between 0.2–0.8. Therefore, the range of E a in the main reaction (α = 0.2 − 0.8) of EEC and EEC under different durations of UV at one and two months was 84.53–87.33, 53.06–59.34, and 74.93–77.59 kJ/mol, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effects of UV for Cycloaliphatic Epoxy Resin via Thermokinetic Models, Novel Calorimetric Technology, and Thermogravimetric Analysis

Laiwang

Liu

Tsai

et al. 2018

Sci Rep

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The cycloaliphatic epoxy resin selected for this study was 3,4-epoxycyclohexane methyl-3′4′-epoxycyclohexyl-carboxylate (EEC). Epoxy resin has numerous applications, such as varnishes, tires, and electronic materials. However, the extensive used of chlorofluorocarbon (CFC) compounds in the last century has resulted in the formation of a hole in the ozone layer. As a consequence, solar radiation is intensifying gradually; therefore, continuous irradiation by sunlight should be avoided. The results of solar radiation can exacerbate the deterioration and photolysis of compounds. Through thermogravimetry and differential scanning calorimetry, the apparent onset temperature of EEC and EEC was analyzed under UV radiation for different durations. Thermokinetic data were used to determine the parameters of thermal decomposition characteristics through simulation to assess the reaction of EEC and EEC under UV radiation for different durations. The goal of the study was to establish the parameters of thermal decomposition characteristics for the effects of UV on EEC, as well as the probability of severity of thermal catastrophe.

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“…TG is an effective technique for analyzing the mass loss of materials to obtain thermal stability parameters of various materials of interest [27][28][29]. Derivative thermogravimetric (DTG) curves were obtained by differentiating TG curves.…”

Section: Tg-dscmentioning

confidence: 99%

Thermal behavior and microcharacterization analysis of second-oxidized coal

Deng

Zhao

Huang

et al. 2016

J Therm Anal Calorim

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Among coal-producing countries, China has witnessed the highest frequency and severity of coal fires. During mining in the re-mining face and the lower part of the thick coal seam (or coal seam group), second or multiple oxidations of the residual coal can readily occur in mined-out areas, severely increasing the risk of coal fires. The study of multiple oxidations of coal aids in the early detection of spontaneous combustion of remaining coal in the mined-out areas. The characteristics of coal fires are demonstrated using fresh coal samples (first-oxidized coal) and oxidized coal samples (second-oxidized coal) from four different ranks of coals. Proximate and elemental analysis, Fourier transform spectroscopy, and thermogravimetry-differential scanning calorimetry were adopted to investigate the quality, microcharacteristics, characteristic temperatures, and apparent activation energy of second-oxidized coal. In addition, the effect of spontaneous combustion at heating rates of 5.0, 10.0, and 15.0°C min -1 was studied. Compared with the four samples of first-oxidized coal, those of second-oxidized coals cause fire easily under the same conditions. List of symbolsA, A k Pre-exponential factor (s -1 ) A ad Ash content in air-dried basis (%) bHeating rate (°C min -1 ) C daf C content of air-dried basis (%) da/dt Conversion rate (s -1 ) E a , E k Apparent activation energy (kJ mol -1 ) f(a)Function of degree of conversion (dimensionless) H daf H content of air-dried basis (%) M ad Moisture in air-dried basis (%) N daf N content of air-dried basis (%) R Universal gas constant (8.314 J mol -1 K -1 ) r Correlation coefficient (dimensionless) O daf O content of air-dried basis (%) S daf S content of air-dried basis (%) T Thermokinetic temperature (K) T 1 First characteristic temperature, critical temperature (°C) T 2 Second characteristic temperature, active temperature (°C) T 3 Third characteristic temperature, pyrolysis temperature (°C) T 4 Fourth characteristic temperature, ignition temperature (°C) T 5 Fifth characteristic temperature, burned-out temperature (°C)

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Incompatible reaction for (3-4-epoxycyclohexane) methyl-3′-4′-epoxycyclohexyl-carboxylate (EEC) by calorimetric technology and theoretical kinetic model

Cited by 14 publications

References 35 publications

Efficient Thermal Transport Highway Construction Within Epoxy Matrix via Hybrid Carbon Fibers and Alumina Particles

Efficient Thermal Transport Highway Construction Within Epoxy Matrix via Hybrid Carbon Fibers and Alumina Particles

Effects of UV for Cycloaliphatic Epoxy Resin via Thermokinetic Models, Novel Calorimetric Technology, and Thermogravimetric Analysis

Thermal behavior and microcharacterization analysis of second-oxidized coal

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