Exploiting deterministic TPG for path delay testing

Crystallization of isotactic polypropylene in the presence of a β‐nucleating agent based on a trisamide of trimesic acid

“…In most of cases, the α‐ and β‐melting peaks are overlapped, and thus they should be separated. The simplest approximation of the partition is the drawing a vertical line through the maxima between the two endothermic peaks 45. The low temperature part of area gives Δ H β and the high temperature area corresponds to Δ H α [see Fig.…”

Lignin in jute fabric–polypropylene composites

“…Normally, there is one fusion peak for a given crystalline phase in DSC tests, although the temperature range for the melting process and the melting temperature may vary, depending on the degree of perfection of the crystals. A higher melting point and a narrower temperature range are expected for the fusion of more perfect crystals, as was stated in relevant literature 21–24…”

“…Injection‐molded and extruded PP samples usually show a skin‐core morphology (the β structure is located at the skin of these samples). Moreover, the β form can also be promoted with respect to the α form by specific crystallization conditions: high cooling rates, high crystallization temperatures or large temperature gradients 19, 21, 24, 25. Besides, the β phase can be obtained by crystallization in the presence of special nucleation agents, i.e., dye quinacridone18 and pimelic acid/calcium stearate 25, 26…”

Characterization of high melt strength polypropylene synthesized via silane grafting initiated by in situ heat induction reaction

“…Figure 3 shows the WAXD profiles of PP and HMSPP. The diffraction peaks of pure PP are located at 14.0°, 16.8°, 18.5°, 21.0°, and 21.8° in the range of 10–25°, which correspond to the α (110), α (040), α (130), α (111), and α (131) planes, respectively 43, 44. It is clearly shown that there is a strong diffraction peak at 2θ = 16.8° for HMSPP, which is much higher than that of pure PP.…”