Self-healing process

The rate equation in the thermal explosion theory is then expressed with the rate constant, Aa exp[- E/R II. alone. In other words, the rate of the exothermic decomposition reaction, in the early stages of the self-healing process, of a chemical of the TD type, including every gas-permeable oxidatively-heating substance, is thought, in the theory, to depend only on one variable, T, i.e., the temperature of the chemical, included in the rate constant. It is thus seen that the theory is in fact very simple by virtue of the /croth-ordcr assumption. 

Several self-healing processes, in the early stages, of 2 cm of a chemical of the TD type, including every oxidatively-heating substance, have been simulated by generating the electric heat at several rates, by means of a constant voltage D.C. power source, in a resistor-thermocouple composite, in place of 2... 

On the other hand, it is apparent to us in Fig. 22 that, as the temperature of the composite rises away from the 7, at each rate of electric heat generation, the adiabatic control becomes gradually broken. As stated in Subsection 4.4.6, die glass closed cell used in the recorder is not perfcclly explosion-proof besides. Therefore, the adiabatic self-healing process recorder is not appropriate for the record of the whole self-heating process up to the thermal explosion of 2 cm of... 

Figure 35. The reference cell assembly has, in fact, been prepared at the rear side of the adiabatic self-healing process recorder.

Figure 41. The self-healing processes, of 2 cm each of three samples of BPO charged each in the three kinds of open-cup cells and subjected each (o the adiabatic self-heating test started from each f near 82 Tl, rceorded each in temperature increments of 2 3 [K] from the con csponding f.

The self-healing process, of 2 cm of BPO charged in the glass open-cup cell and subjected to the adiabatic self-healing test started from a near 82 IC, recorded in temperature increments of 3 K from the f. 

Figure 45. Five self-healing processes, of 2 cm each of five samples of TBPB charged each in the open-cup cell and subjected each to the adiabatic self-healing test started from each T, in the range of 73,18 to 79.62 t with mutual intervals of 1 2 K, recorded each for the time, A I, required for the temperature of each sample of TBPB to increase by the definite value of id T of 1.25 K from the corresponding 7,.

The individual values of the two coefficients, a and h, of Eq. (44) holding for the individual self-healing processes, in the early stages, of 2 cm each of the nine powdery chemicals of the TD type, other than powdery AIBN, confined each in the closed cell and subjected each to the adiabatic self-healing test were also calculated by applying the regression analysis to the individual combinations of the value of nA( with that of l/J,- and are presented in Tabic 15. 

The surprising feature of the dissolution curves is the large and very reproducible excursion or loop as the starting-point is approached. This traverses a region of the A—ift surface that is inaccessible by an combination of transparent layers and therefore has to be due to the development, and the subsequent disappearance by a remarkable "self-healing process, of a rough layer or pitted aluminium surface. 

Figure 7.1 Schematic of the bio-inspired self-healing process of the proposed composite (2-D view)...

The self-healing process of this composite system is repeatable because the shape recovery of the SMPFs is repeatable and the thermoplastic parficles can be repeatedly melted and solidified. Figure 7.29 shows the cyclic tensile and thermal induced shape recovery of the SMPFs. 

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