Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
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Page 16
... DSC heating traces of polyester and polyurethane block copolymers and homopolymers ( Samuels , 1973 ; Seymour , 1973 ) . Typical DSC traces are shown in Figure 2-3 for an MDI / BD / PTMO block copolymer . The temperature and energy of ...
... DSC heating traces of polyester and polyurethane block copolymers and homopolymers ( Samuels , 1973 ; Seymour , 1973 ) . Typical DSC traces are shown in Figure 2-3 for an MDI / BD / PTMO block copolymer . The temperature and energy of ...
Page 138
... DSC traces . This analysis , although largely qualitative , does demonstrate the relation between and Tg . D. 1 Discussion Multiple , overlapped endothermic maxima are observed in the DSC traces for all polymers in this study . The DSC ...
... DSC traces . This analysis , although largely qualitative , does demonstrate the relation between and Tg . D. 1 Discussion Multiple , overlapped endothermic maxima are observed in the DSC traces for all polymers in this study . The DSC ...
Page 155
... DSC measurements . Substantiating their light - microscope observations , these investigators found distinct differences in DSC traces from skin and core regions of the materials with high polyurethane fractions . TEM investigations ...
... DSC measurements . Substantiating their light - microscope observations , these investigators found distinct differences in DSC traces from skin and core regions of the materials with high polyurethane fractions . TEM investigations ...
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