A simple, sensitive graphical method of treating thermogravimetric analysis data

Broido, A.

doi:10.1002/pol.1969.160071012

Cited by 820 publications

(394 citation statements)

References 6 publications

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“…Broido method [35] has been used to determine activation energy of degradation. Results are shown in Figure 2 and reported in Table 1.…”

Section: Thermal Stabilitymentioning

confidence: 99%

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Influence of hydrogen bonds on glass transition and dielectric relaxations of cellulose

Roig¹,

Dantras²,

Dandurand³

et al. 2011

J. Phys. D: Appl. Phys.

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The molecular dynamic in hydrated cellulose has been investigated by a combination of thermal analyses and dielectric spectroscopy. Differential Scanning Calorimetry (DSC) shows the dependence upon hydration of the glass transition temperature T g . A physical ageing phenomenon has been observed. At the molecular scale, bound water is hydrogen bonded to polar sites of cellulose macromolecules. At the macroscopic scale, water molecules play the role of a plasticizer for cellulose lowering its T g . Dynamic Dielectric Spectroscopy (DDS) combined with Thermostimulated Currents (TSC) have allowed us to follow more localized molecular mobility. The β relaxation mode is characterized by activation entropies that vanish for higher water contents indicating molecular mobility localization. It is plasticized by water like the glass transition. This analogy is explained by a common origin of both mechanisms: the mobility of the cellulose backbone. The evolution of the γ mode upon hydration follows an anti-compensation law. Water acts as an anti-plasticizer in a hydrogen bonded network.

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“…Broido method [35] has been used to determine activation energy of degradation. Results are shown in Figure 2 and reported in Table 1.…”

Section: Thermal Stabilitymentioning

confidence: 99%

“…Sampling of cellulose was twofold: powder or pellets. Activation energy of cellulose degradation is analysed using Broido method [35]:…”

Section: Thermogravimetrymentioning

confidence: 99%

Influence of hydrogen bonds on glass transition and dielectric relaxations of cellulose

Roig¹,

Dantras²,

Dandurand³

et al. 2011

J. Phys. D: Appl. Phys.

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“…The results of TGA analysis of poly-(CMPM), poly(CMPM-co-MMA) (20:80, 50:50, 80:20 monomer feed ratio) and poly(MMA) are presented in Table III. The data clearly indicate that all copolymers of CMPM undergo two step decomposition while homo polymers of both the monomers show one step decomposition in the temperature range of 210-472 C. The activation energy (E A ) calculated by Broido's method, 26 lies in the range of 102-115 KÁJÁmol À1 . The integral procedural decomposition temperature (IPDT) was calculated by Doyle's method.…”

Section: Thermal Analysismentioning

confidence: 99%

Synthesis, Characterization and Antimicrobial Activity of Novel Acrylic Copolymers

Dolia

Patel

Ray

et al. 2006

Polym J

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ABSTRACT:Copolymers of monomers 4-chloro-3-methyl phenyl methacrylate (CMPM) and methyl methacrylate (MMA) were synthesized with different monomer feed ratios using 2,2 0 -azobisisobutyronitrile (AIBN) as initiator in toluene at 70 C. The copolymers were characterized by IR-spectroscopy and their compositions were determined by ultraviolet (UV) and 1 H NMR spectroscopy. The linearization method of Fineman-Ross and Kelen-Tudos were employed to calculate the monomer reactivity ratio. Average molecular weight and polydispersity index were obtained by gel permeation chromatography (GPC). Thermogravimetric analysis (TGA and DTA) of copolymers were carried out under a nitrogen atmosphere. Antimicrobial effects of the homo and copolymers were also investigated for various microorganisms such as bacteria, fungi and yeast.

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“…The decomposition kinetics were modeled according to the Broido equation (Broido 1969;Khalil et al 2011),…”

Section: Characterizationmentioning

confidence: 99%

Thermal Stability of Sugarcane Bagasse Derivatives bearing Carboxyl Groups Synthesized in Ionic Liquid

2016

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To illuminate changes in the thermal stability of lignocellulosic biomass by homogeneous chemical modification in ionic liquids, sugarcane bagasse derivatives bearing carboxyl groups were prepared in ionic liquids. Fourier transform infrared (FT-IR) spectroscopy and solid-state nuclear magnetic resonance (NMR) confirmed the chemical structure of the derivatives. Sugarcane bagasse derivatives with degree of substituted OH as high as 9.93 mmol/g were achieved. The homogeneous esterification was demonstrated to be a more efficient approach than heterogeneous ones. Based on thermogravimetric analysis, the onset degradation temperature of sugarcane bagasse decreased dramatically to 185 °C, 160 °C and 140 °C, using succinic anhydride, maleic anhydride, and phthalic anhydride as reagent, respectively. A first-order degradation kinetic model was applied to obtain the degradation activation energies of sugarcane bagasse. The results showed that homogeneous chemical modification significantly decreased the thermal stability of sugarcane bagasse by reducing the onset degradation temperature and degradation activation energies.

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A simple, sensitive graphical method of treating thermogravimetric analysis data

Cited by 820 publications

References 6 publications

Influence of hydrogen bonds on glass transition and dielectric relaxations of cellulose

Influence of hydrogen bonds on glass transition and dielectric relaxations of cellulose

Synthesis, Characterization and Antimicrobial Activity of Novel Acrylic Copolymers

Thermal Stability of Sugarcane Bagasse Derivatives bearing Carboxyl Groups Synthesized in Ionic Liquid

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