A phenomenological one-parameter equation of state for osmotic pressures of PEG and other neutral flexible polymers in good solvents.
A phenomenological one-parameter equation of state for osmotic pressures of PEG and other neutral flexible polymers in good solvents.
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DOI:
10.1021/jp806893a
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发表时间:
2009-03-26
期刊:
影响因子:
--
通讯作者:
Parsegian VA
中科院分区:
文献类型:
--
作者:
Cohen JA;Podgornik R;Hansen PL;Parsegian VA
We present a phenomenological one-parameter scaling equation of state that accurately represents osmotic pressures of neutral flexible polymers in good solvents from the dilute through the semidilute regime. The equation comprises a sum of scaled van’t Hoff and des Cloizeaux terms including a fitted parameter α, the “crossover index”, which encapsulates all chemical specificity and determines the relevant prefactors. Strikingly different values of α are found for the two very different systems poly(ethyleneglycol)/water (PEG) and poly(α-methylstyrene)/toluene (PAMS). α-dependent rescaling collapses both data sets to a simple one-parameter scaling function. The fact that the anomalous system PEG/water and the canonical system PAMS/toluene can both be described by the same equation of state attests to the robustness of the polymer-scaling concepts introduced by de Gennes.
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影响因子:
2.6
作者:
DEGENNES, PG
通讯作者:
DEGENNES, PG
DOI:
10.1051/jphys:01975003604028100
发表时间:
1975-01-01
期刊:
JOURNAL DE PHYSIQUE
影响因子:
--
作者:
DESCLOIZEAUX, J
通讯作者:
DESCLOIZEAUX, J
影响因子:
5.5
作者:
NODA, I;KATO, N;NAGASAWA, M
通讯作者:
NAGASAWA, M
影响因子:
5.5
作者:
DAOUD, M;COTTON, JP;GENNES, PGD
通讯作者:
GENNES, PGD
影响因子:
2.4
作者:
Bekiranov, S;Bruinsma, R;Pincus, P
通讯作者:
Pincus, P