BERSHTEIN, V. A., V. M. EGOROV, P. N. YAKUSHEV, L. DAVID, Petr SYSEL, Vladimír ŠINDELÁŘ and P. PISSIS. Poly(imide-amide)-poly(ethylene adipate) hybrid networks. I. Nanostructure and segmental dynamics. Polymer. Amsterdam: Elsevier, 2002, vol. 43, No 25, p. 6943-6953. ISSN 0032-3861. |
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@article{601346, author = {Bershtein, V. A. and Egorov, V. M. and Yakushev, P. N. and David, L. and Sysel, Petr and Šindelář, Vladimír and Pissis, P.}, article_location = {Amsterdam}, article_number = {25}, keywords = {polyimides; hybrid networks}, language = {eng}, issn = {0032-3861}, journal = {Polymer}, title = {Poly(imide-amide)-poly(ethylene adipate) hybrid networks. I. Nanostructure and segmental dynamics}, volume = {43}, year = {2002} }
TY - JOUR ID - 601346 AU - Bershtein, V. A. - Egorov, V. M. - Yakushev, P. N. - David, L. - Sysel, Petr - Šindelář, Vladimír - Pissis, P. PY - 2002 TI - Poly(imide-amide)-poly(ethylene adipate) hybrid networks. I. Nanostructure and segmental dynamics JF - Polymer VL - 43 IS - 25 SP - 6943-6953 EP - 6943-6953 PB - Elsevier SN - 00323861 KW - polyimides KW - hybrid networks N2 - Segmental dynamics at 200-500 K and nanometer-scale structure were studied by SAXS, DSC and creep rate spectroscopy (CRS) techniques in two series of poly(ethylene adipate)-crosslinked poly(imide-amides) with regularly varied compn. and different lengths of PEA crosslinks (Mn=1.300 and 2.700 g mol-1). The crystn. ability was obsd. in networks with longer PEA crosslinks. Shorter PEA crosslinks induced non-cryst., nanostructured PIA-PEA networks. Combined DSC/CRS anal. indicated the pronounced heterogeneity of segmental dynamics in the latter networks. The wide dispersions of motional activation energies within the glass transitions were found by DSC, and manifestation of a few constituent segmental motions was shown in the creep rate spectra. The obsd. effects could be explained in terms of (i) the different constraining influence of PIA rigid constituents on dynamics in PEA crosslinks, and (ii) the breakdown of motional cooperativity as a result of loosening of PEA chain packing in presence of the PIA rigid nanodomains. ER -
BERSHTEIN, V. A., V. M. EGOROV, P. N. YAKUSHEV, L. DAVID, Petr SYSEL, Vladimír ŠINDELÁŘ and P. PISSIS. Poly(imide-amide)-poly(ethylene adipate) hybrid networks. I. Nanostructure and segmental dynamics. \textit{Polymer}. Amsterdam: Elsevier, 2002, vol.~43, No~25, p.~6943-6953. ISSN~0032-3861.
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