Time delay effect in TMA methods for MUF resins testing

To eliminate the possibility that the time delay effect was a fabrication of the method or of the equipment such as the presence of residual heat from the first run in the TMA equipment the same experiment was repeated on two glue-mixes of the same type one of which was aged first and then tested while the second one was tested second but immediately after preparation. The results were found to be the same showing that the effect was real and not due to a fabrication of the equipment or method used. This effect must always be taken into account when testing aminoplastic resins glue-mixes by TMA.