Water swelling rubber (WSR) was prepared by reaction blending SBR andsodium polyacrylate (PAANa). The existing states of water in the WSR was studied bymeans of DSC and TG. It was found that water exists in three states: nonfreezing water
bound freezable water and free water. The relationships between water states and structureof PAANa were investigated. The results showed that the amount of non-freezing waterwas related to total water content
and the ratio of non-freezing water versus -COONa groups on PAANa(mol/mol) was about 4.However
total water content slightly affected the content of bound freezable water and remarkably affected the amount of free waer.
Abstract
Water swelling rubber (WSR) was prepared by reaction blending SBR andsodium polyacrylate (PAANa). The existing states of water in the WSR was studied bymeans of DSC and TG. It was found that water exists in three states: nonfreezing water
bound freezable water and free water. The relationships between water states and structureof PAANa were investigated. The results showed that the amount of non-freezing waterwas related to total water content
and the ratio of non-freezing water versus -COONa groups on PAANa(mol/mol) was about 4.However
total water content slightly affected the content of bound freezable water and remarkably affected the amount of free waer.
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