Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
From inside the book
Results 1-3 of 15
Page 138
... maxima are observed in the DSC traces for all polymers in this study . The DSC scan rate determines the relative sizes of the low - temperature and primary endothermic maxima ; at low rates reorganization into thicker crystallites can ...
... maxima are observed in the DSC traces for all polymers in this study . The DSC scan rate determines the relative sizes of the low - temperature and primary endothermic maxima ; at low rates reorganization into thicker crystallites can ...
Page 144
... maxima . The model used allowed for both fintte lateral extent and random ensemble orientation of the lamellar stacks ( Vallance , 1982 ) . The predicted scattering maxima was either too narrow or too low , relative to the diffuse ...
... maxima . The model used allowed for both fintte lateral extent and random ensemble orientation of the lamellar stacks ( Vallance , 1982 ) . The predicted scattering maxima was either too narrow or too low , relative to the diffuse ...
Page 279
... maxima corresponding to d - spacings of 8 to 14 nm . The polyurethane data have not been shown . In the case of the segmented polyesters , strong evidence indicates that the scattering maxima are due to constructive interference between ...
... maxima corresponding to d - spacings of 8 to 14 nm . The polyurethane data have not been shown . In the case of the segmented polyesters , strong evidence indicates that the scattering maxima are due to constructive interference between ...
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