Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
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Page 25
... average polyurethane domain dimensions were found to vary from 3.8 to 6.1 nm with increasing average polyurethane segment length , while calculated average , extended - chain , segment lengths varied from 4.7 to 25.7 conformation . In ...
... average polyurethane domain dimensions were found to vary from 3.8 to 6.1 nm with increasing average polyurethane segment length , while calculated average , extended - chain , segment lengths varied from 4.7 to 25.7 conformation . In ...
Page 89
... average molecular weight of 1000 . oxide ) with a [ ( CO COOCH2CH2CH2CH20 ) x ( CH2CH2CH2CH20 ) yn Here y averages 12 to 13. The number - average molecular weight of the copolymers is typically 25,000 to 30,000 . The average value of x ...
... average molecular weight of 1000 . oxide ) with a [ ( CO COOCH2CH2CH2CH20 ) x ( CH2CH2CH2CH20 ) yn Here y averages 12 to 13. The number - average molecular weight of the copolymers is typically 25,000 to 30,000 . The average value of x ...
Page 126
... average crystal thickness in the [ 001 ] direction of the superlattice . ( d ) < li > is the average crystal thickness in the directions perpendicular to the [ 001 ] direction . <A> is the average intercrystallite distance in the [ 100 ] ...
... average crystal thickness in the [ 001 ] direction of the superlattice . ( d ) < li > is the average crystal thickness in the directions perpendicular to the [ 001 ] direction . <A> is the average intercrystallite distance in the [ 100 ] ...
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