Temperature-concentration behavior of solutions of polydisperse, atactic poly(methyl methacrylate) and its influence on the formation of amorphous, microporous membranes

P. Vandeweerdt; H. Berghmans; Y.M.T. Engelen

doi:10.1021/ma00012a014

Temperature-concentration behavior of solutions of polydisperse, atactic poly(methyl methacrylate) and its influence on the formation of amorphous, microporous membranes

P. Vandeweerdt, H. Berghmans, Y.M.T. Engelen

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Abstract

The temp.-concn. behavior of solns. of PMMA in 1-butanol and cyclohexanol was investigated. A liq.-liq. demixing interfered with a glass transition (Tg). In the high-concn. region, Tg decreased with decreasing PMMA concn. For concns. in the demixing region, Tg increased slightly with decreasing PMMA concn. This was ascribed to the influence of polydispersity of PMMA on the concn. of the coexisting phases. The combination of these 2 thermal transitions led to the formation of amorphous glassy gels at room temp. After elimination of the solvent, different morphologies ranged from glassy particle dispersions to porous glassy materials could be obtained. The morphol. could be controlled by overall polymer concn. and cooling rate. Phase sepn PMMA soln.

Original language	English
Pages (from-to)	3547-3552
Journal	Macromolecules
Volume	24
Issue number	12
DOIs	https://doi.org/10.1021/ma00012a014
Publication status	Published - 1991

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title = "Temperature-concentration behavior of solutions of polydisperse, atactic poly(methyl methacrylate) and its influence on the formation of amorphous, microporous membranes",

abstract = "The temp.-concn. behavior of solns. of PMMA in 1-butanol and cyclohexanol was investigated. A liq.-liq. demixing interfered with a glass transition (Tg). In the high-concn. region, Tg decreased with decreasing PMMA concn. For concns. in the demixing region, Tg increased slightly with decreasing PMMA concn. This was ascribed to the influence of polydispersity of PMMA on the concn. of the coexisting phases. The combination of these 2 thermal transitions led to the formation of amorphous glassy gels at room temp. After elimination of the solvent, different morphologies ranged from glassy particle dispersions to porous glassy materials could be obtained. The morphol. could be controlled by overall polymer concn. and cooling rate. Phase sepn PMMA soln.",

author = "P. Vandeweerdt and H. Berghmans and Y.M.T. Engelen",

year = "1991",

doi = "10.1021/ma00012a014",

language = "English",

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pages = "3547--3552",

journal = "Macromolecules",

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publisher = "American Chemical Society",

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T1 - Temperature-concentration behavior of solutions of polydisperse, atactic poly(methyl methacrylate) and its influence on the formation of amorphous, microporous membranes

AU - Vandeweerdt, P.

AU - Berghmans, H.

AU - Engelen, Y.M.T.

PY - 1991

Y1 - 1991

N2 - The temp.-concn. behavior of solns. of PMMA in 1-butanol and cyclohexanol was investigated. A liq.-liq. demixing interfered with a glass transition (Tg). In the high-concn. region, Tg decreased with decreasing PMMA concn. For concns. in the demixing region, Tg increased slightly with decreasing PMMA concn. This was ascribed to the influence of polydispersity of PMMA on the concn. of the coexisting phases. The combination of these 2 thermal transitions led to the formation of amorphous glassy gels at room temp. After elimination of the solvent, different morphologies ranged from glassy particle dispersions to porous glassy materials could be obtained. The morphol. could be controlled by overall polymer concn. and cooling rate. Phase sepn PMMA soln.

AB - The temp.-concn. behavior of solns. of PMMA in 1-butanol and cyclohexanol was investigated. A liq.-liq. demixing interfered with a glass transition (Tg). In the high-concn. region, Tg decreased with decreasing PMMA concn. For concns. in the demixing region, Tg increased slightly with decreasing PMMA concn. This was ascribed to the influence of polydispersity of PMMA on the concn. of the coexisting phases. The combination of these 2 thermal transitions led to the formation of amorphous glassy gels at room temp. After elimination of the solvent, different morphologies ranged from glassy particle dispersions to porous glassy materials could be obtained. The morphol. could be controlled by overall polymer concn. and cooling rate. Phase sepn PMMA soln.

U2 - 10.1021/ma00012a014

DO - 10.1021/ma00012a014

M3 - Article

SN - 0024-9297

VL - 24

SP - 3547

EP - 3552

JO - Macromolecules

JF - Macromolecules

IS - 12

ER -

Temperature-concentration behavior of solutions of polydisperse, atactic poly(methyl methacrylate) and its influence on the formation of amorphous, microporous membranes

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