Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
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Page 102
... degree of polymerization of the sequences of the crystallizable component is to depress Tm relative to To . of m From Table 4-1 it can be seen that Th decreases with decreasing p ( and decreasing < x > , the number - average degree of ...
... degree of polymerization of the sequences of the crystallizable component is to depress Tm relative to To . of m From Table 4-1 it can be seen that Th decreases with decreasing p ( and decreasing < x > , the number - average degree of ...
Page 178
... degree of polymerization of the polyether sequences < y + 1 > , even though the variaton in < y + 1 > is small , from 19.6 in Q2 to 22.2 in Q5 . Heat of melting measurements confirm a 15 - fold increase in crystallinity betwen Q2 and Q5 ...
... degree of polymerization of the polyether sequences < y + 1 > , even though the variaton in < y + 1 > is small , from 19.6 in Q2 to 22.2 in Q5 . Heat of melting measurements confirm a 15 - fold increase in crystallinity betwen Q2 and Q5 ...
Page 294
... degree of polymerization and the nature of the polyester segments are systematically varied , it should be possible to select between potential mechanisms . The polymers , 16 of which have already been kindly synthesized by Dr. J. M. ...
... degree of polymerization and the nature of the polyester segments are systematically varied , it should be possible to select between potential mechanisms . The polymers , 16 of which have already been kindly synthesized by Dr. J. M. ...
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