ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
In the present article we give a detailed analysis of ABA triblock copolymers in a selective solvent that is a good one for the outer blocks and a theta solvent for the inner one. A lattice model is used for the investigations and the concentration ranges from a volume fraction φ=0 up to φ=0.8. The results are compared to the behavior of the constituent homopolymers, i.e., homopolymers in athermal (AAA) and theta solvent (BBB). In the limit φ→0 the concentration dependence of properties of the whole chain as well as properties of individual blocks, may be deduced from pair-data with excellent precision for all systems under consideration. For large concentrations mean square dimensions of ABA markedly exceed that of AAA or BBB, respectively, due to microphase separation which becomes evident for concentrations larger than φ(approximate)0.4 which corresponds to the point where intermolecular and intramolecular interactions are equally important. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.480655
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