The solid‐state properties of a highly crosslinked amorphous resole‐type phenolic polymer have been studied by compressibility and torsional braid analysis measurements. Three secondary transitions were found over the temperature range of 123° to 623° K the largest of which occurs at about 393°K. These results confirm previously made electrical resistivity and specific heat measurements. These transitions are discussed in relation to the structure of this polymer.
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Warfield et al. (1977) studied this question.
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