Abstract
The influence of chain structure and solvent quality on the thermoreversible gelation of stereoisomers of polymethylmethacrylate is discussed. In n-butanol, amorphous gels are obtained with the different isomers. Under the correct annealing conditions, the isotactic isomer will also form crystalline gels. In o-xylene and toluene, the syndiotactic PMMA forms gels by a conformational change, followed by an intermolecular association. In the same solvents, the isotactic polymer seems to form gels by crystallization. In solvents like MEK and DMF, the last polymer behaves in the same way as the syndiotactic in the aromatic solvents.
The data are discussed in the more general framework of the different possibilities of physical network formation in relation to the chain structure of vinyl polymers.
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References
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© 1990 Elsevier Science Publishers Ltd
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Berghmans, H., Van Den Broecke, P., Thijs, S. (1990). Chain Structure and Solvent Quality: Key Factors in the Thermoreversible Gelation of Solutions of Vinyl Polymers. In: Lemstra, P.J., Kleintjens, L.A. (eds) Integration of Fundamental Polymer Science and Technology—4. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0767-6_2
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DOI: https://doi.org/10.1007/978-94-009-0767-6_2
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