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Thermal properties of poly(ester-imide)s with C12H24 and C22H44 groups

“…These fitting parameters of Table II were taken at the minimums of the chi-square statistical functions. 6 In the low-temperature ranges (below 270 K and 230 K for PEIM-22 and 12, respectively), the calculated heat capacities agree well with the experimental data (RMS of 4 -5 %). Table I contains also the data for the vibrational heat capacity (recommended heat capacity).…”

“…There is no adequate and simple microscopic theory of liquids to easily describe the conformational and external contributions. 6,7 It was, however, empirically found that C p L is often a linear function of temperature. Using the addition scheme developed for ATHAS, the total heat capacity of liquid state (C p L ) in J K Ϫ1 mol Ϫ1 can be obtained from contributions of the structural units as: 11,12 (4) where N are the numbers of the respective groups in the repeating unit of the PEIM-ns and the functions in the parentheses represent the contributions of the structural units to the total heat capacity at temperature T. The heat capacities of the liquid state of each structural unit was established from the prior data on liquid polyethylene, poly(ethylene terephthalate), and poly(oxyethyleneoxy-1,3-phenylene-4,4Ј-oxydiphthalimide-1,4-phenylene) contained in the ATHAS data bank.…”

Heat capacity of solid-state biopolymers by thermal analysis

“…5 For PLTRP and horse myoglobin, the experimental data were fitted to the general Tarasov equation, 20 as described in detail in Ref. 21. In this case, a two-dimensional continuum, characterized by a linearly increasing density of states, is inserted between ⌰ 3 and ⌰ 1 .…”

Greater insight into the MTDSC technique involving fundamental sinusoidal heat flow equations

“…Modulated temperature DSC (MTDSC) was originally conceived by Reading [1][2][3][4] and the mathematical theory has been extensively studied by many researchers, including Wunderlich [5][6][7][8][9], Cao [10][11][12] and Thomas [13][14][15]. MTDSC not only provides the same data as conventional DSC; it also provides additional information not available from conventional DSC, thus enabling the user to analyse complex transitions.…”

“…This provides the user with a greater understanding of the sample properties being tested, hence making MTDSC an invaluable technique for polymer analysis. Some examples of research conducted using MTDSC include studies on the kinetics of polymer crystallisation [7,16], the analysis of polymer melting [9,17,18] and various studies examining the glass transition [1,19].…”