Unger, R.; Donth, E.
Crystallization and melting behaviour in block copolymers of poly(ethylene oxide) with
amorphous components. The influence of compatibility.
Unger, R.; Donth, E.: Crystallization and melting behaviour in block
copolymers of poly(ethylene oxide) with amorphous components. The
influence of compatibility.
Acta Polymerica 42 (9) (1991) 431–438,
DOI: 10.1002/actp.1991.010420906.
By means of DSC, connections between melt crystallization (Tc) and melting temperatures (Tm) of block copolymers have been studied as depending on the compatibility of the block copolymer components. As examples for a compatible and an incompatible system, the system poly(ethylene oxide) (PEO, crystalline) – poly(methyl methacrylate) (PMMA, amorphous) and PEO/poly(tert.-butyl methacrylate) (PMMA, amorphous), respectively, were used. The compatibility of both systems is described. In block copolymers of compatible components, Tc depends on the composition, but it is less than in comparable blends. Provided a sufficient crystallization time is available, Tm is, in effect, only dependent on the PEO molecular weight. In block copolymers of incompatible components both Tc and Tm were strongly determined by molecular weights of both components and, connected with that, by PEO domain sizes. Tc vs. Tm diagrams are presented and discussed.