Study on Preparation and Thermolysis Properties of an Affinity Switchable Polymer Containing Sulfonate Unit -The Effect of Sulfonate Substituents on Thermolysis Properties

摘要

A series of copolymer containing sulfonate unit have been synthesized, which undergone thermal decomposition and generated sulfonic acid. Systematic investigation was done on the effect of different sulfonate u-nits and its substitute on thermolysis properties. And the influences of sulfonate unit concentration on aqueous solubility of the polymer after exposed to high temperature were systematically examined. The polymer was prepared by copolymerizing vinyl sulfonate, methyl methacrylate(MMA) and methacrylic acid(MAA) in different proportions. DSC, TG and IR data revealed that the decomposition temperature and thermal stability of the polymer mainly relied on the type of sulfonate monomer and its substituent. Polymer films containing polymer of properly adjusted sulfonate and carboxyl units could be completely dissolved in neutral water after heating treatment. This may open a great possibility for this material to be used in neutral water processable or processless thermo-imaging applications.