The thermoreversible gelation of solutions of isotactic poly(methyl methacrylate) is investigated. Amorphous gels can be prepared in l‐butanol by a combination of a liquid‐liquid demixing with an upper critical demixing temperature and a glass transition. Annealing of the demixed solutions above their glass transition temperature T G , results in the formation of a crystalline gel. In oxylene, crystalline gels are formed by a liquid‐liquid demixing with an lower critical demixing temperature and an annealing at room temperature. Very fast gelation is observed to occur far below room temperature in solvents like 2‐butanone.
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Broecke et al. (1990) studied this question.
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