Non-isothermal reaction kinetics of lithium cobalt oxide

Lu, Chung‐Hsin; Yeh, Po-Ying; Hsu, Wu‐Huei

doi:10.1016/j.jallcom.2008.09.102

Cited by 13 publications

(11 citation statements)

References 38 publications

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“…As shown in Fig. 5, for all the samples, the observed diffractions at 2q ¼ 20 and 23 corresponded to a crystalline form of nylon-6 matrix and were indexed as (200) and (002/202) reflections respectively [16,17]. XRD pattern of the MC nylon-6-b-POD copolymers exhibited similar diffraction peaks compared with that of neat MC nylon-6 except the copolymer with 6.0 wt% POD content in which a new and small diffraction peak at 2q ¼ 11.58 was observed.…”

Section: Crystal Structurementioning

confidence: 85%

Monomer casting nylon-6-b-polyether amine copolymers: Synthesis and properties

2015

Composites Part B: Engineering

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Section: Crystal Structurementioning

confidence: 85%

Monomer casting nylon-6-b-polyether amine copolymers: Synthesis and properties

2015

Composites Part B: Engineering

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“…According to the relationship between the conversion rate and temperature variation, the general equation for studying the nonisothermal reaction kinetics of the exothermic chemical reaction can be deduced and described as following :

ln [1 / true(T_{normalf} - T_{0} true) \cdot dT / dt true] = ln A + n \cdot ln true[1 - true(T - T_{0} true) / true(T_{normalf} - T_{0} true)] - E / RT

where T 0 , T f , and T are the initial matrix temperature, final matrix temperature, and matrix temperature at reaction time t , respectively; dT / dt is the heating‐rate of the matrix; n is the reaction order; A is the pre‐exponential factor; E is the apparent activation energy of the reaction process; and R is the gas constant with value of 8.314 J/(K mol).…”

Section: Resultsmentioning

confidence: 99%

Respective Contribution Research of Soft Component and Macroinitiator on Synthesis and Performance of MCPA‐PEA Materials

Wang

Liu

et al. 2017

Polymer Engineering & Sci

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The monomer casting polyamide‐polyether amine (MCPA‐PEA) materials initiated by TDI‐PEA macroinitiator presented an obvious toughness characteristic which was contributed by the combination effect of PEA‐TDI macroinitiator and soft PEA component itself. The MCPA‐PEA materials with different content of PEA‐TDI macroinitiator or PEA component were prepared and then the respective contribution of PEA‐TDI macroinitiator and soft PEA component on the synthesis and performance were researched. It was found that the PEA‐TDI macroinitiator presented the dominant contribution and main influence on the polymerization process with higher activation energy and reaction order than PEA component. The PEA molecular chains did not participated in the crystallization process and made no influence on crystal structure of MCPA material whatever the way of copolymerization or blending. The PEA‐TDI macroinitiator also showed the dominant contribution on the decreasing effect of crystallization properties than PEA component with lower crystallinity and smaller spherulites size. The fibrous‐structure for MCPA‐0.3%PEA matrix was more obvious with notable deformation and high impact strength which further indicated the dominant contribution of PEA‐TDI macroinitiator on toughness. The toughening mechanism was deduced as the vast energy consumption by intense extension of fibrous‐structure and the highly orientation of molecular chains. POLYM. ENG. SCI., 58:1353–1361, 2018. © 2017 Society of Plastics Engineers

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“…As to an exothermic chemical reaction, the universal equation for studying the nonisothermal reaction kinetics can be stated as follows :

d α / d t = {(1 - a)}^{n} \cdot A \cdot e^{(- E / R T)}

where α is the reaction conversion rate; t , the reaction time; n , the reaction order; A , the pre‐exponential factor; T , the reaction temperature; E is the apparent activation energy of the reaction; and R is the gas constant and R = 8.314 J/(K · mol).…”

Section: Resultsmentioning

confidence: 99%

“…As to an exothermic chemical reaction, the universal equation for studying the nonisothermal reaction kinetics can be stated as follows [16]:…”

Section: Synthesis Of MC Nylon-6/peo Blendsmentioning

confidence: 99%

Preparation and properties of monomer casting nylon-6/PEO blend prepared via in situ polymerization

Lin

2014

Polym Eng Sci

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A series of MC nylon-6/ polyethylene oxide (PEO) blends were prepared via in situ polymerization. It was found that addition of PEO delayed the polymerization process of caprolactam. The apparent activation energy and preexponential factor increased, indicating that the polymerization reaction became difficult with increasing PEO content. The stress-strain curves of the blends presented strain hardening behavior and increasing elastic deformation stress plateau at low PEO content. Nonisothermal DSC and XRD tests indicated that addition of PEO led to a decrease of the crystallization ability of the nylon-6 matrix by reducing crystal grain size and crystallinity, whereas the crystallization ability of the PEO phase was improved. No co-crystal formed between the two phases. PEO with low content only existed as amorphous state, while with increasing PEO content, PEO can crystallize gradually, forming interfibrillar segregation first, and then forming interspherilute segregation of the blend independently. By addition of PEO, the fracture surface of the blend became rough, displaying character of tough fracture. The interface between nylon-6 phase and PEO phase was diffused, and the nylon-6 matrix around the PEO particles presented fibrous structure, indicating the good compatibility between them. The toughening mechanism of the blend corresponded to the crazing-shear banding mechanism. POLYM. ENG. SCI., 55:589-597, 2015.

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Non-isothermal reaction kinetics of lithium cobalt oxide

Cited by 13 publications

References 38 publications

Monomer casting nylon-6-b-polyether amine copolymers: Synthesis and properties

Monomer casting nylon-6-b-polyether amine copolymers: Synthesis and properties

Respective Contribution Research of Soft Component and Macroinitiator on Synthesis and Performance of MCPA‐PEA Materials

Preparation and properties of monomer casting nylon-6/PEO blend prepared via in situ polymerization

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