Linear pyrolysis of polymethyl methacrylate

Tkachenko, E. V.; Ulybin, V. B.; Shteĭnberg, A. S.

doi:10.1007/bf00757449

Cited by 8 publications

(7 citation statements)

References 5 publications

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“…It has the meaning of the smallness of the contribution of the convective term to the total heat flux, with the upper-bound estimate (maximum possible values of both multipliers) taken for the convective term. The slightly less strict condition is obtained from the more accurate estimate of the maximum of the convective term: 0.26[H(T 0 ) − H f ] ΔH [in this case, the convective term is estimated for ρV n taken according to (14) and assuming that H − H f depends linearly on n]. Nevertheless, the condition discussed here cannot be satisfied for a hot thermal knife.…”

Section: Thermal Knife With a Gas Space (Pyrolysis Mode)mentioning

confidence: 96%

“…This proposition was accepted or approximately validated in studies of a similar (to the situation at the edge of the thermal knife) pyrolysis process in [6,13,14]. In [7], accounting for the variation in the gap thickness seems insufficiently valid: the local rate of gas generation (pyrolysis) along the normal to the EM surface was assumed to depend on the pressure u n ∼ P ν .…”

Section: Thermal Knife With a Gas Space (Pyrolysis Mode)mentioning

confidence: 99%

“…The result naturally does not depend on the reference point of enthalpy. We note that, in [6,13,14] it was assumed that q = idem. In addition, the heat transfer was assumed to be purely conductive, and, hence for λ = const, we have a linear temperature distribution across the gap.…”

Section: Thermal Knife With a Gas Space (Pyrolysis Mode)mentioning

confidence: 99%

“…However, such refinements are likely to be useless because of poor knowledge of the physics of the process. Next, we assume that P = P (s), ρ = P (s)/RT (n), ρV s is determined from (14), T (n) from (18), the tangential stress from…”

Section: Thermal Knife With a Gas Space (Pyrolysis Mode)mentioning

confidence: 99%

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Operating modes of thermal knives

Gusachenko

2010

Combust Explos Shock Waves

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Section: Thermal Knife With a Gas Space (Pyrolysis Mode)mentioning

confidence: 96%

Section: Thermal Knife With a Gas Space (Pyrolysis Mode)mentioning

confidence: 99%

Section: Thermal Knife With a Gas Space (Pyrolysis Mode)mentioning

confidence: 99%

Section: Thermal Knife With a Gas Space (Pyrolysis Mode)mentioning

confidence: 99%

See 2 more Smart Citations

Operating modes of thermal knives

Gusachenko

2010

Combust Explos Shock Waves

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“…Much attention has been given to the linear pyrolysis of thermoplastics [8,13,[21][22][23][24][25][26][27]. In this case the temperature distribution in the condensed phase is defined by Mikhelson's equation [9].…”

Section: Ea(t~-t')s + 2rnu--d--(tz -Ts)s]mentioning

confidence: 99%

High-temperature pyrolysis of polymers

Khalturinskii

1987

Journal of Thermal Analysis

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The experimental results on the pyrolysis of thermoplastic polymers under high-temperature heating and burning conditions are discussed. The reaction of polymer degradation in this case proceeds in the same way as in a low-temperature region.In this paper we discuss polymeric materials and their widespread application, in connection with the increase in their production. Attention is focused on their resistance to external exposure,and in particular to heating exposures of various intensities. Such exposure of a polymer surface results in heating of the polymer and leads to thermal degradation. The latter process is of paramount importance from different points of view.Questions concerning various aspects of the isothermal degradation of polymers and of theories of thermal degradation have been discussed in detail by a number of investigators; attempts have also been made to establish the dependence of the decomposition mechanisms of polymers on their structures. Comprehensive monographs on these subjects have been written by Jellinek [1], Grassie [2], Madorsky [3] and others [4,5].Extrapolation of the "isothermal" bulk degradation kinetics data to the range of pyrolysis rates usually encountered in surface pyrolysis and burning is considered invalid [6].The simplest case is the thermal degradation and pyrolysis of thermoplastics, i.e. when a polymer is gasified completely. In this connection, it becomes possible to study high-temperature degradation and pyrolysis under quasi-stationary conditions. In the case of polymers of the second and third types, a char residue accumulates on the condensed phase surface; this leads to a continuous change in the conditions of heat transfer in the interface between the gas and condensed phases. The present work is devoted to an analysis of experimental data on the pyrolyses of thermoplastic polymers.A number of techniques have been developed for study of the kinetic characteristics of pyrolysis. These cannot be studied by classical isothermal methods because the pyrolysis rates and temperatures are in ranges inaccessible to

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Study of the High-Temperature Decomposition of AP and PMMA by the Linear Pyrolysis Method

Shteĭnberg

Fast Reactions in Energetic Materials

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Linear pyrolysis of polymethyl methacrylate

Cited by 8 publications

References 5 publications

Operating modes of thermal knives

Operating modes of thermal knives

High-temperature pyrolysis of polymers

Study of the High-Temperature Decomposition of AP and PMMA by the Linear Pyrolysis Method

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