Critical parameters in designing segmented polyurethanes and their effect on morphology and properties: A comprehensive review

Cellulose nanocrystals reinforced environmentally-friendly waterborne polyurethane nanocomposites

“…Contact angle measurement is a suitable technique in order to comprehend the affinity of the materials surface with liquids (Kushwaha, Avadhani, & Singh, 2014). Regarding the WCA values, it is considered that hydrophobic surfaces present higher values than 90 º, while hydrophilic surfaces are characterized by presenting lower WCA values (Yilgör, Yilgör, & Wilkes, 2015). In this case, WBPU matrix presents a considerably hydrophobic character which is reduced as CNC content is increased, even around 15º for WBPU-5.…”

Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges

“…TPUs typically exhibit very good nanophase separation with narrow T g ranges of their respective components [57][58][59][60][61][62][63][64][65][66][67][68][69]. Dynamic mechanical analysis (DMA) of TPUs typically shows sharp transitions with well-defined loss tangent (tan d) peaks over a narrow temperature range [57][58][59][60][61][62][63][64][65][66][67][68][69].…”

Effects of cellulose fiber content on physical properties of polyurethane based composites

“…Since its first laboratory synthesis in 1937, polyurethane (PU) has rapidly grown to be one of the most diverse and widely-used materials which constantly stimulate the interest of researchers because of its several interesting properties such as low density, thermal conductivity, moisture permeability, a high strength to weight ratio and dimensional stability [31][32][33][34][35][36][37][38]. Moreover, the formulation and reaction conditions can be readily adjusted to synthesize different PU materials with desired properties for specific applications.…”