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Heritage Science
Fig. 1 | Heritage Science

Fig. 1

From: The significance of sample preparation of historical and contemporary poly(vinyl chloride) objects to investigate the distribution and changes of molar mass by SEC-MALS-dRI

Fig. 1

The intensity of aggregates in the solution of sample PVC2. The curved lines correspond to the intensity of the light scattering signal, while the straight lines present the molar mass of the fraction eluting at the time. The single polymer strands elute as the fraction with an apex at 18.5 min, and the aggregates elute as a fraction with an apex at 15.5 min. The relative signal for aggregates decreases with longer heating times and eventually becomes a shoulder of the main fraction. Trace amounts of aggregates are still visible with the MALS detector, which do not contribute to a miscalculated Mw, because the signal on the dRI detector is negligible

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