Abstract
A mean-field analysis of microphase separation and phase behavior is described for melts of linear A-B multiblock copolymers, each chain consisting of a stochastic sequence of flexible segments (each with M monomers), AM and BM, for a total of Q ≫ 1 segments per chain. We find a phase diagram similar to that for statistical A-B copolymers (M = 1) but with an isotropic Lifshitz point that should be accessible for a wide variety of materials. Due to the broad distribution of sequence lengths of like monomers, the microphases are predicted to lack long-range order and to exhibit unusual temperature sensitivity at the order-disorder transition. This may open the way to a novel class of polyurethanes and thermoplastic elastomers.
Original language | English (US) |
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Pages (from-to) | 6341-6354 |
Number of pages | 14 |
Journal | Macromolecules |
Volume | 25 |
Issue number | 23 |
DOIs | |
State | Published - Nov 1 1992 |
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry