Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
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Page 74
... measurements are needed . The chief drawback is the problem of charge leakage in the electrometer circuit , which is critical at longer times . D. Comparison of Two Techniques The Figures 3-4 and 3-5 show ' and ε " spectra measured with ...
... measurements are needed . The chief drawback is the problem of charge leakage in the electrometer circuit , which is critical at longer times . D. Comparison of Two Techniques The Figures 3-4 and 3-5 show ' and ε " spectra measured with ...
Page 83
... measured with the alternating - current spectrometer . These spectra were measured before integral gold electrodes were applied to the sample . After two weeks of air High exposure , the sample was placed in a roughing pump vacuum for ...
... measured with the alternating - current spectrometer . These spectra were measured before integral gold electrodes were applied to the sample . After two weeks of air High exposure , the sample was placed in a roughing pump vacuum for ...
Page 222
... measured . That the sample had equilibrated was checked by re - measuring at the first frequency after all ten measurements had been taken . Temperature was then lowered to the next test test temperature and the equilibration and ...
... measured . That the sample had equilibrated was checked by re - measuring at the first frequency after all ten measurements had been taken . Temperature was then lowered to the next test test temperature and the equilibration and ...
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