Injection-moulded α- and β-polypropylenes: II. Tensile properties vs. processing parameters

The effects of crystallization condition on the microstructure and thermal stability of istactic polypropylene nucleated by β‐form nucleating agent

“…But it is the β form that has been the subject of intensive investigation because of its promising mechanical properties. For example, the impact strength and toughness of β‐iPP were found to exceed those of α‐iPP, which can be attributed to the peculiar lamellar morphology of β‐iPP,7 including the formation of an enlarged plastic zone as well as the strain induced β–α transition during mechanical deformation 8–10…”

Effect of N,N′‐diphenyl adipamide on the formation of the β‐crystalline form in isotactic polypropylene

“…Cho and coworkers8, 9 prepared a β‐iPP sample by adding 0.2 wt % NJStar to the iPP melt and studied the melting memory effect in the crystallization of β‐iPP. Romankiewicz and coworkers,10–12 Raab and coworkers,13–15 Kotek and coworkers,16–20 Obadal and coworkers,21–28 and Výchopňová and coworkers29, 30 also modified iPP with NJStar NU100, and they studied the morphology, molecular and supermolecular orientation, crystallization, mechanical behavior, and structural transformation of β‐iPP induced by heating and ultraviolet light, composites of β‐iPP with calcium carbonate, wood flour, and ethylene–propylene rubber, a synergy application of NJStar NU100, and high pressure during crystallization in the tailoring of multicomponent crystalline systems in iPP. Zhou et al31 studied a β‐form iPP spherulite induced by N,N ′‐dicyclohexyl‐2,6‐naphthalenedicarboxamide at 130°C with high‐temperature atomic force microscopy in situ and in real time.…”

Fatigue Fracture Properties and Morphology of Polyoxymethylene (POM) Plates Produced under Moderate Processing Conditions

“…However, this number becomes significantly smaller when only those are considered, which examine the full chain (starting with processing and ending with the mechanical properties) and not only parts of it. From a material's point of view, so far, most of the work was done for polypropylene [18,[22][23][24][25][26][27][28][29][30][31][32][33][34][35], which seems to be the best studied polymer in this field. Nevertheless, aside from studies done on other polymers [17,36,37], there are surprisingly many publications available for POM [13,19,23,[38][39][40] as well.…”