We derive the strong-stretching approximation from the full partition function for diblock copolymer melts. Using a perturbation expansion for the free energy, with (χN)-1/3 as the expansion parameter, we calculate the leading corrections to the asymptotic χN → ∞ limit for the domain period and the free energy. The leading corrections to the free energy scale as log χN. They arise from the entropy gain due to the wandering of chain ends over the domains and the entropy loss to localize the joints in the interfacial region.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry