Journal article
Molecular weight scaling in critical polymer mixtures
Symmetric binary mixtures of partially deuterated polymers were prepared at the critical composition. The segment-segment interaction energy parameter chi(eff) was varied by adjusting the difference in deuterium content DELTA-X(D) between species. Chi(eff) was measured as a function of temperature, DELTA-X(D), and molecular weight by small-angle neutron scattering.
The critical point for demixing was determined to scale as chi(eff,c) is similar to N(-delta) with delta = 1.01 +/- 0.05, where N is the degree of polymerization. This result confirms the mean-field prediction of Flory and Huggins.
Language: | English |
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Year: | 1992 |
Pages: | 2452-2455 |
ISSN: | 00319007 and 10797114 |
Types: | Journal article |
DOI: | 10.1103/PhysRevLett.68.2452 |
ORCIDs: | Almdal, K. |