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Polyurethanes hard segment domain

Figure 6.2 Polyurethane hard segment domains dispersed in a soft segment matrix. Figure 6.2 Polyurethane hard segment domains dispersed in a soft segment matrix.
Fridman I, Thomas E. Morphology of crystalline polyurethane hard segment domains and spherulites. Polymer 1980 21(4) 388-92. [Pg.20]

In addition to microphase structures, MDI/BDO-based polyurethane systems have exhibited spherulitic superstructure. Characterization of the birefringence of the spherulites was used to determine the orientation of the hard-segment domains (7). However, because of the sensi-... [Pg.39]

DSC, WAXS, electron diffraction, and electron microscopy support a phase-separated morphology for all five of the random copolymer PCP/MDI/BDO-segmented polyurethanes studied. The slight increase observed by Seefried et al. (9) in the lower temperature Tg with hard-segment concentration is therefore likely attributable to increased reinforcement of the soft-segment matrix by an increased number of dispersed hard-segment domains. [Pg.56]

Figure 1. Molecular schematics of some possible segmented polyurethane morphologies. For convenience, good phase separation is assumed, (a) Hard-segment domains dispersed within a soft-segment matrix (b) interconnected hard-segment phase giving rise to continuous phases of both hard and soft segments (c) soft-segment phase is dispersed within a continuous matrix of hard segments. Figure 1. Molecular schematics of some possible segmented polyurethane morphologies. For convenience, good phase separation is assumed, (a) Hard-segment domains dispersed within a soft-segment matrix (b) interconnected hard-segment phase giving rise to continuous phases of both hard and soft segments (c) soft-segment phase is dispersed within a continuous matrix of hard segments.
Wolinska-Grabezyk, A. (2006). Effect of the hard segment domains on the permeation and separation ability of the polyurethane-based membranes,282, 225-236. [Pg.855]

Comparison of Tg of the hard segment domain in polyether polyurethanes and polyether polyurethaneureas. [Pg.123]

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See also in sourсe #XX -- [ Pg.143 ]



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Domain hard segment

Segment polyurethane

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