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Unperturbed dimensions of polystyrene in mixed solvents at high temperature
At 371.5 K, which is the θ-temperature for polystyrene (PS) in 3-methyl cyclohexanol (MC), intrinsic viscosities [η] have been measured for PS samples of different relative molar mass M in mixtures of MC with a thermodynamically good solvent 1,2,3,4-tetrahydronaphthalene over the whole range of solv...
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Published in: | European polymer journal 1982, Vol.18 (8), p.735-739 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | At 371.5 K, which is the θ-temperature for polystyrene (PS) in 3-methyl cyclohexanol (MC), intrinsic viscosities [η] have been measured for PS samples of different relative molar mass
M in mixtures of MC with a thermodynamically good solvent 1,2,3,4-tetrahydronaphthalene over the whole range of solvent composition. Eleven graphical procedures have been utilised and assessed in deriving the unperturbed polymer dimensions expressed as
K
θ
(in the relation
[η] = K
θM
1
2
α
3
where α is the expansion factor). For those procedures concluded to be the most reliable, there was no influence of binary solvent composition: the value of
K
θ
= 78 (±1) × 10
−3 dm
3 kg
−1 was the same as that obtained directly under θ-conditions. |
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ISSN: | 0014-3057 1873-1945 |
DOI: | 10.1016/0014-3057(82)90105-7 |