The effect of hard segment content of polyurethane on the performances of polyurethane porous mixture

Challenges and recent advances in bio-based isocyanate production

“…By varying the relative amounts of hard and soft phases, the physical and mechanical properties of polyurethanes can be adjusted. Increasing the content of hard segments should lead to increased modulus, strength, and brittleness of the material [24] Scheme 1. The structure of polyurethane [24].…”

“…Increasing the content of hard segments should lead to increased modulus, strength, and brittleness of the material [24] Scheme 1. The structure of polyurethane [24]. Because of differences in the polarity and chemical nature of monomers between segments, domain structure formation and phase separation occurs.…”

“…Increasing the content of hard segments should lead to increased modulus, strength, and brittleness of the material. 22…”

Design and sustainability analyses of road base layers stabilized with traditional and nontraditional additives

“…Regarding the polymeric technologies, a significant amount of research has delved into the use of polyurethane POL to replace traditional bituminous binder for surface layers. Some studies highlighted a degradation in the mechanical response after FT cycles, but a fine gradation was selected for the tested samples (Chen et al, 2018;Cong et al, 2020). However, additional research is surely needed to address and understand the temporal development of the mechanical properties of aggregates stabilized with polymeric products.…”

Improving performance of TPU by controlled crosslinking of soft segments

“…Thermal and mechanical properties of TPUs can be tuned by a number of techniques. Increasing hard segment (HS) content typically results in improved strength and stiffness, while maximum elongation is compromised 10,11 . Altering the composition of the polyol (i.e.…”