Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
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Page 30
... interface . The former are predicted by some block copolymer thermodynamic models ( Helfand , 1975 , 1976 , 1980 ) to exist at the interface of two amorphous phases . The latter , electron density gradients due to variations in packing ...
... interface . The former are predicted by some block copolymer thermodynamic models ( Helfand , 1975 , 1976 , 1980 ) to exist at the interface of two amorphous phases . The latter , electron density gradients due to variations in packing ...
Page 85
... interfaces between phase domains , minimal disorder in the polyester crystallites , nearly random mixing of the chemically dissimilar sequences in the amorphous domains , predominantly three - dimensional ( rather than one - dimensional ) ...
... interfaces between phase domains , minimal disorder in the polyester crystallites , nearly random mixing of the chemically dissimilar sequences in the amorphous domains , predominantly three - dimensional ( rather than one - dimensional ) ...
Page 280
... the intrinsic free energy of the polymer . The low mobility at crystal - amorphous interfaces , predicted by subaudio dielectric spectroscopy , points to the constrained nature of the folded amorphous segments in the 280.
... the intrinsic free energy of the polymer . The low mobility at crystal - amorphous interfaces , predicted by subaudio dielectric spectroscopy , points to the constrained nature of the folded amorphous segments in the 280.
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