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Journal of Thermal Analysis and Calorimetry

, Volume 133, Issue 1, pp 753–761 | Cite as

Application of thermal ignition theory of di(2,4-dichlorobenzoyl) peroxide by kinetic-based curve fitting

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Abstract

Di(2,4-dichlorobenzoyl) peroxide (DCBP), classified as a diacyl peroxide, is commonly used in silicone rubber manufacturing as a crosslinking agent, vulcanizing agent, and polymerization initiator. However, its reactivity or incompatibility may negatively affect safety requirements and concerns during chemical reactions. This study was conducted to investigate the properties of DCBP by using differential scanning calorimetry and a literature review. Specifically, thermal decomposition behavior of DCBP was examined by combining simulations with thermal analysis methods to analyze the foundation of thermokinetics, such as the peak temperature, heat of decomposition, and apparent activation energy of DCBP. Based on parameters obtained from the calculations, this investigation was integrated with thermal explosion theory, which represents a major advancement in the comprehension of behavior between heat release and heat transfer to the surroundings incorporated into a single differential equation, and a decision was made from a criticality criterion simultaneously.

Keywords

Di(2,4-dichlorobenzoyl) peroxide (DCBP) Polymerization initiator DSC Thermal decomposition Thermal analysis 

List of symbols

A

Pre-exponential factor of Arrhenius equation, min−1

A(α)

Pre-exponential factor of Arrhenius equation at conversion α, min−1

A’(α)

Modified pre-exponential factor by a product of A(α) and f(α), min−1

α

Reaction conversion, dimensionless

β

Heating rate, °C min−1

Co

Initial concentration of the reaction, g cm−3

C

Concentration of the reaction, g cm−3

Cp

Specific heat of material, J g−1 K−1

Ea

Apparent activation energy, kJ mol−1

E(α)

Apparent activation energy at conversion α, kJ mol−1

f(α)

Reaction equation, dimensionless

h

Heat exchange capability index of the cooling system, kJ m−2 K−1min−1

k

Reaction rate constant, dimensionless

n

Reaction order, dimensionless

m

Mass of material, g

ΔHd

Heat of decomposition, J g−1

ΔHt

Heat of decomposition at t, J g−1

ΔHtotal

Heat of decomposition from material, J g−1

Qg

Heat production rate, kJ min−1

Qr

Heat discharge rate, kJ min−1

Qr1

Heat discharge rate by high cooling medium, kJ min−1

Qr2

Heat discharge rate by cooling system, kJ min−1

Qr3

Heat discharge rate by low cooling system, kJ min−1

Qmax

Maximum heat discharge rate, kJ min−1

R

Gas constant, 8.31415 J K−1 mol−1

R2

Coefficient of determination, dimensionless

r

Reaction rate, mol L−1 s−1

S

Effective heat exchange area, m2

T

Process temperature, K

T0

Apparent exothermic temperature, K

Ta

Surrounding temperature under cooling system, K

TC,I

Critical ignition temperature, K

TC,E

Critical extinguished temperature, K

Tmax

Temperature at the maximum heat release in reaction, K

TM

Cutoff point between curves Qg and Qr at the highest and lowest cooling efficient system, K

TS,E

Stable point of extinguished temperature, K

TS,I

Stable point of ignition temperature, K

TS,L

Stable point at low temperature, K

TS,H

Stable point at high temperature, K

t

Reaction time, min

V

Volume of process instrument, m3

XA

Fractional conversion, dimensionless

Notes

Acknowledgements

The authors are indebted to the Ministry of Science and Technology (MOST) in Taiwan under the contract number 104-2622-E-224-009-CC2 for financial support, as well as the Department of Natural Sciences Key Fund, Bureau of Education, Anhui Province, China, for its financial support under contract number KJ2017A078. Conflict of Interest: The authors declare that they have no conflict of interest.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  1. 1.Graduate School of Engineering Science and TechnologyNational Yunlin University of Science and Technology (YunTech)YunlinTaiwan, ROC
  2. 2.Department of Ammunition Engineering and Explosion TechnologyAnhui University of Science and TechnologyAnhuiChina
  3. 3.Department of Industrial Education and TechnologyNational Changhua University of EducationChanghuaTaiwan, ROC
  4. 4.Department of Occupational Safety and HealthChang Jung Christian UniversityTainanTaiwan, ROC
  5. 5.Department and Graduate School of SafetyHealth, and Environmental Engineering, Center for Process Safety and Industrial Disaster Prevention, YunTechYunlinTaiwan, ROC

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