Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
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Page 35
... shown in Figure 2-9 . In case the polyurethane segments were preferentially aligned in the radial direction , they proposed a mechanism whereby the nucleation of a single polyurethane- rich microdomain causes a cascade of nucleation ...
... shown in Figure 2-9 . In case the polyurethane segments were preferentially aligned in the radial direction , they proposed a mechanism whereby the nucleation of a single polyurethane- rich microdomain causes a cascade of nucleation ...
Page 49
... shown to occur only occasionally . A later model ( Lilaonitkul , 1977 ) , shown in Figure 2-16 , differs in that chain - folding is is shown as the dominant mechanism for lamellar growth . SALS evidence indicated that at least three ...
... shown to occur only occasionally . A later model ( Lilaonitkul , 1977 ) , shown in Figure 2-16 , differs in that chain - folding is is shown as the dominant mechanism for lamellar growth . SALS evidence indicated that at least three ...
Page 262
... shown in Figure 6-15 . The high temperature process data are shown for Q9 . The apparent activation energies listed in Table 6-2 show a weak tendency to decrease with increasing segment lengths and phase separation . Q10 , with a ...
... shown in Figure 6-15 . The high temperature process data are shown for Q9 . The apparent activation energies listed in Table 6-2 show a weak tendency to decrease with increasing segment lengths and phase separation . Q10 , with a ...
Contents
THE CONDENSATION BLOCK COPOLYMER LITERATURE | 8 |
Schematic representation of different types of hard | 19 |
THE MEASUREMENT OF INTERFACIAL POLARIZATION | 30 |
20 other sections not shown
Common terms and phrases
amorphous phase analysis approximately average block copolymers calculated calorimetry component composition crystalline phase decreasing degree of polymerization dielectric spectroscopy differential scanning calorimetry diffraction lines DSC traces equation exhibit films frequency glass transition temperature gradients heat of fusion heating traces homopolymer hydrogen bonding increasing integral isotropic lamellae lattice Lilaonitkul maxima measured melting endotherm melting point microdomains microscopy microstructures modulus mold molecular weight N/cm² nucleation number-average paracrystalline parameters permittivity poly(tetramethylene polyester polyester crystallites polyether crystallization polyether melting polyether segments polyether sequences polymers polyurethane segments polyurethane sequences primary transition PTMEG PTMO PTMO-PTMT PTMT reaction regions rubbery plateau sample SAXS scanning scattering angle scattering patterns segment lengths segmented polyesters segmented polyether-esters segmented polyether-urethanes segmented polyurethanes shown in Figure spectra spectrometer spherulites Subaudio subcooling superlattice Table temperature range thermal thermoplastic elastomers urethane values volume fraction weight fraction X-ray diffraction X-ray scattering