Microstructure in Polyether-ester and Polyether-urethane Block Copolymers: Electric Polarization and X-ray Diffraction as Morphological Probes |
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Page 83
... sample . After two weeks of air High exposure , the sample was placed in a roughing pump vacuum for 48 hours at 297 K. This drying technique proved insufficient . conductivity due to absorbed water results in a large , low - frequency ...
... sample . After two weeks of air High exposure , the sample was placed in a roughing pump vacuum for 48 hours at 297 K. This drying technique proved insufficient . conductivity due to absorbed water results in a large , low - frequency ...
Page 90
... Sample thickness was varied by varying the thickness of the mold cavity from 0.01 to 0.01 to 0.2 cm . Samples were stored at 297 K in vacuum prior to use . Experimental Procedures . DSC traces were recorded for 0.015 to 0.02 g samples ...
... Sample thickness was varied by varying the thickness of the mold cavity from 0.01 to 0.01 to 0.2 cm . Samples were stored at 297 K in vacuum prior to use . Experimental Procedures . DSC traces were recorded for 0.015 to 0.02 g samples ...
Page 222
... Samples were mounted at ambient conditions with minimal exposure to atmosphere . Sample temperature was then raised to the highest test temperature . After the temperature had stabilized no data was taken for 45 minutes while the sample ...
... Samples were mounted at ambient conditions with minimal exposure to atmosphere . Sample temperature was then raised to the highest test temperature . After the temperature had stabilized no data was taken for 45 minutes while the sample ...
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