In:
Macromolecular Symposia, Wiley, Vol. 198, No. 1 ( 2003-08), p. 295-308
Kurzfassung:
The reaction‐induced phase separation in blends based on a carboxyl‐terminated poly(butadiene‐ co ‐acrylonitrile) rubber (CTBN), dissolved in diglycidyl ether of bisphenol A (DGEBA) ‐ benzylamine (BA) monomers, was studied. The polymerization kinetics was followed by size exclusion chromatography, for both the neat DGEBA‐BA system and for blends containing 10 wt% CTBN. No effect of CTBN addition on the polymerization rate was observed within experimental error. The kinetics could be fitted with a model based on the presence of non‐catalytic and OH‐catalyzed reactions and assuming equal reactivity of primary and secondary amine hydrogens. Cloud‐point conversions were determined at 60, 70 and 80 °C. The Flory‐Huggins model provided a reasonable fitting of experimental data using an interaction parameter depending exclusively on temperature, and taking polydispersities of both linear polymers into account. Linear epoxy/amine systems may be used to test the reliability of thermodynamic theories in more complex situations (e.g., modifiers with a broad distribution of molar masses or mixtures of several modifiers).
Materialart:
Online-Ressource
ISSN:
1022-1360
,
1521-3900
DOI:
10.1002/masy.200350825
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2003
ZDB Id:
2038549-3
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