Similar observation can also be found in the melt
endotherm of p-MWNT containing nanocomposites (Fig.
Similar to the data in Figure 8, the 1st scan data exhibit a [T.sub.g], stress relaxation
endotherm, and a residual cure exotherm.
Energetic demands are roughly an order of magnitude greater in
endotherms relative to ectotherms of the same size (e.g., Humphreys, 1979; Bennet and Ruben, 1979; Hayes, 2010; recently reviewed by Glazier, 2014).
Hence, the denaturation
endotherm does not appear on the DSC cycle for minimally or 'just surface' adsorbed samples.
Thermoanalysis of the polymer revealed a glass transition temperature [T.sub.g] of 4.3[degrees]C, a cold crystallization point [T.sub.c] at 67.2[degrees]C, and two melting
endotherms [T.sub.m1] and [T.sub.m2] at 130.2 and 140.6[degrees]C.
According to Bergmann's rule,
endotherm (warm blooded) vertebrates living in cooler climates tend to be larger than members of the same genus in warmer climates.
The DSC curve of psyllium shows a broad
endotherm at 70.29[degrees]C with heat of fusion of 181.3 J/g followed by an exotherm at 308.50[degrees]C with heat flow of 240.1 J/g.
After that the sample was held at zero temperature for 5 min and then heated to 190 [degrees]C at the same rate to get an
endotherm. Both melting and crystallization parameters were obtained from the exotherms and
endotherms.
A broad
endotherm was observed around 120[degrees]C irrespective of moulding temperature.
After cooling from 70[degrees]C to -120[degrees]C at 10[degrees]C/ min, the SBO sample exhibited a small
endotherm at -77[degrees]C which was immediately followed by a significant crystallization exotherm and two
endotherms with peak temperatures of -39 and -25[degrees]C This behavior suggests that the original crystallites formed during the controlled cooling were quite imperfect resulting in a relatively low melting temperature and immediate recrystallization to produce the higher temperature
endotherms.