Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
From inside the book
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Page 35
... structure in which miscellar liquid crystals of the polyurethane segments oriented preferentially , either radially or circumferentially , as shown in Figure 2-9 . In case the polyurethane segments were preferentially aligned in the ...
... structure in which miscellar liquid crystals of the polyurethane segments oriented preferentially , either radially or circumferentially , as shown in Figure 2-9 . In case the polyurethane segments were preferentially aligned in the ...
Page 38
... polyurethanes , where the polyurethane segments take radial orientations . I. Nucleation occurs between polyurethane segments on chains c and d . II . Crystallization , non - crystalline hydrogen bonding and entanglements cause the ...
... polyurethanes , where the polyurethane segments take radial orientations . I. Nucleation occurs between polyurethane segments on chains c and d . II . Crystallization , non - crystalline hydrogen bonding and entanglements cause the ...
Page 216
... segments in two distinct environments . The high - frequency maximum is attributed to motion of segregated polyester segments while the low frequency maximum is due to molecular motions in interfacial regions composed of intimately ...
... segments in two distinct environments . The high - frequency maximum is attributed to motion of segregated polyester segments while the low frequency maximum is due to molecular motions in interfacial regions composed of intimately ...
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