Hour-glass plot

Figure 11-14. Plot of Si ( 1) energies in eV, with respect to O p for several C4-substituted 2P derivatives. Squares are MRCI results, and hour-glasses are from experimentally determined absorption maxima. (From Ref. [144])...

Figure 4 is the same plot as in Figure 3 but for a smaller amount of glass. The difference in adsorbed quantities at 20 and 70 hours equilibration times is smaller than with the higher weight of the adsorbent. 

The creep behavior of 40% glass-filled polyphenylene sulfide Is summarized In Figure 5 which plots creep modulus against time for three sets of experimental conditions 23°C/5,000 psi, 66°C/5,000 psi, and 121°C/5,000 psi. Table II compares the per cent loss In apparent creep modulus at 1,000 hours and at 10,000... 

The effects due to very slow processes in the sample, however, may not be removed even in the quasi-isothermal MTDSC with data collection after 10 min. The analysis of the slow response of the sample in the glass transition region will be treated in Section 4.3. The decrease in the heat capacity due to cold crystallisation can easily be converted into a plot of the crystallisation kinetics. Additional points for the kinetics plot can be generated at shorter and longer analysis times of the quasi-isothermal runs. The time-scale can easily be adjusted to modulations from 1 min to many hours, limited only by the patience of the operator and the stability of the calorimeter. 

Dynamic Process Study. More than two hundred coatings have been tested with this method. More than fifteen percent showed self-healing to different extents, mainly depending on their glass transition temperature, Tg. This is attributed to viscoelastic creep. Viscoelastic creep is different from elastic recovery it results in partial or complete recovery of a marred surface within a time frame from several minutes to several hours (J3, 14), while the elastic recovery occurs immediately after the marring tip moves over the surface. To study the creep in detail, we imaged the marred surface continuously, immediately after the scratching, at a time interval of 10 minutes up to several hours when the recovery was almost complete, and stored the data in a computer. Later we plotted the dimension of mar versus time, and studied the recovery rate, recoverable part, and unrecoverable part for the mars made under different normal forces. 

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