On the other hand, an increasing trend of R 1 with temperature is observed for PVB-H at frequencies above 1 MHz, while R 1 reaches a maximum and then decreases at lower frequencies for T > 105 °C.
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Unravelling Main- and Side-Chain Motions in Polymers with NMR Spectroscopy and Relaxometry: The Case of Polyvinyl Butyral.
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