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The Rôle of the Chain Length in the Stability of Polyion Complexes by Tsuchida, Eishun ;Osada, Yoshihito is a Chemistry article available to read on EtoBox.
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## Abstract To demonstrate the cooperativity in the formation of an interpolymer complex, the stability of polyanion‐polycation complexes as a function of their chain length was studied. Poly(methacrylic acid) (PMAA; P̄~n~ ≈ 800) was used as source for the polyanion and quaternized alkylamines and polyethyleneimines with various chain lengths (**1a–g** and **2a–g**) as source for the polycation. The reaction was followed by the measurement of [H^+^] from which the stability constants (__K__) of the complexes were calculated. It was found that the __K__‐values increased exponentially from 10^2^ to 8.10^4^l mol^−1^ with increasing chain length of the polycation. Furthermore, it was found that, in addition to COULOMBic forces, the hydrophobic interaction plays an important rǒle in the complexation.
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- Author
- Tsuchida, Eishun ;Osada, Yoshihito
- Publisher
- Wiley (John Wiley & Sons); Wiley (ISSN 0025-116X)
- Published
- 1974
- Field
- Chemistry (Physical Sciences)