Combined thermal analysis of fluid plasticizers

Abstract

The paper deals with the study of plasticizers using different thermal methods. The literature data on the melting points of plasticizers proved uncertain; we intended to gather the data by other methods, differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and thermally stimulated discharge (TSD). Results of ten plasticizers are demonstrated. During this work, we found that most of plasticizers have no well-defined melting point, and the solidification of plasticizer is similar to the glass transition of polymers. Only the di-n-butyl-phthalate showed regular crystallization. Thermally stimulated discharge current (TSD) method revealed that these compounds have several transitions –dispersion ranges assigned to different molecular motions.

Plasticization of a Semicrystalline Metallosupramolecular Polymer Network

“…157 °C) and a previously reported value for DIDP (T g ≈ −64 °C). 54 Intriguingly, the corresponding plot of the calculated T g values against the weight fraction of the added plasticizer shows that the experimental values are significantly lower than expected for a DIDP content of up to 5 wt % (Figure 3d, circles), which is in stark contrast to reported T g values for samples of poly(vinyl chloride) plasticized with DIDP 59 or di(2-ethylhexyl phthalate) 60 (DEHP; T g ≈ −85 °C) 54 and the values calculated with the Fox equation (Figure S10). Even at the lowest plasticizer concentrations, for which one can assume complete miscibility, we observe a pronounced deviation from the behavior predicted based on the Fox equation.…”

“…(d) Plot of the experimentally determined and calculated glass transition temperature ( T g ) against the weight fraction of the added plasticizer in the metallosupramolecular polymer. A previously reported T g value of DIDP that was determined by DMA measurements was used for the calculation of expected T g values with the Fox equation. The shown DSC traces and SAXS/WAXS scattering profiles are vertically shifted for clarity.…”

Combined thermal analysis of plant oils

“…), further correction was not applied. The depolarization current of the borosilicate filter is less than 1 pA until 0 °C and less than 5 pA at 50 °C [14].…”

“…For TSD measurements, 60 gm −2 borosilicate glass fiber filter of 0.2 mm thickness and 2.6 μm nominal pore size and 87 ± 2% pore volume (SIGMA F7769) was used as scaffolding material described in [13,14].…”

“…However, the relative error is the same for both E' and for E''; therefore, the mechanical loss factor (tgδ) is exact. Setaram TSCII instrument was used for the TSD measurements with a cell supplied with that instrument [14]. Borosilicate glass filter disks of 7 mm diameter were soaked with the plasticizer and put into the standard cell.…”