Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
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Page 87
... PTMT crystalline phase in samples prepared from undiluted melts . Broad thermal glass transitions and aging effects ( Van Bogart , 1981 ) suggest that the amorphous regions are not without some heterogeneous structure . Lilaonitkul , et ...
... PTMT crystalline phase in samples prepared from undiluted melts . Broad thermal glass transitions and aging effects ( Van Bogart , 1981 ) suggest that the amorphous regions are not without some heterogeneous structure . Lilaonitkul , et ...
Page 148
... PTMT block copolymers of this study , it is reasonable to assume a two - phase model of microstructure . The crystalline phase involves only the alpha form of PTMT and is relatively free of lattice disorder , random thermal vibrations ...
... PTMT block copolymers of this study , it is reasonable to assume a two - phase model of microstructure . The crystalline phase involves only the alpha form of PTMT and is relatively free of lattice disorder , random thermal vibrations ...
Page 294
... PTMT Zhu , et al . ( Zhu , segmented copolymers exhibited isotropic , PTMT - crystallization kinetics which followed [ 7-11 ] . In accordance with theory , m did not vary with temperature , although the values of m measured were not the ...
... PTMT Zhu , et al . ( Zhu , segmented copolymers exhibited isotropic , PTMT - crystallization kinetics which followed [ 7-11 ] . In accordance with theory , m did not vary with temperature , although the values of m measured were not the ...
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