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Structure-Property Relationships in Polyurethanes

The flexible blocks primarily influence the elastic nature of the product and its low-temperature performance, and they make important contributions towards the hardness, tear strength and modulus. Such strong polar interactions in polyurethane block copolymers can lead to a supramolecular organization into aggregated structures, which may be in the form of glassy domains or crystallites. Aggregation of highly polar blocks depends upon many different structural features and also upon the thermal tensile history of the specimen, and it is for this reason that thermal [Pg.51]

COHESION ENERGIES OF GROUPS COMMON IN URETHANE ELASTOMERS [Pg.52]

The structure - property relationships in polyurethanes (PU) have been excellently presented in the general monographs on PU [1-11]. As a consequence, this chapter will not be very long and it will present only the specific general effects of the oligo-polyol s structure on the resulting polyurethane properties. [Pg.535]

Guo, A. W. Zhang Z.S. Petrovic. Structure-property relationships in polyurethanes derived from soybean oil./. Mater. Sci. 2006, 41, 4914-4920. [Pg.607]

Sykes, P. A. (1996). Structure-property relationships in polyurethane elastomers. Progress in Rubber and Recycling Technology, 12, 3, 236-257. [Pg.160]

Earlier work on chain extended HPLs has shown that these derivatives produce uniform (i.e., single phase) polymers with Tg varying in accordance with the Gordon-Taylor relationship (12). Polyurethanes from chain-extended HPLs were found to be rubber-like at room temperature with modulus declining as lignin content is reduced (8). Star-like structure determines functionality, Tg, viscosity, and several other properties that influence utility as polymer segment. [Pg.419]

Ophir, Z. Structure-Property Relationships in Solid Polymers I — Segmented Polyurethanes and II — Epoxy Thermosets. Ph. D. Thesis, Princeton University (1979)... [Pg.172]

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Property relationships

STRUCTURAL PROPERTIES RELATIONSHIP

Structure-property relationship polyurethane

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