Polymer Structure: Cross-Linking of a Polybenzimidazole

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Science  08 Feb 1963:
Vol. 139, Issue 3554, pp. 494-495
DOI: 10.1126/science.139.3554.494


The torsional braid technique was used to monitor the changes in rigidity and damping characteristics of a polybenzimidazole as it changes from a thermoplastic polymer to a thermoset resin at about 450°C. In an intermediate process the thermoplastic backbone of the polymer becomes flexible.