Kinetics of pressure-induced structural changes of thermoresponsive poly-N-n-propylacrylamide and related polymers
Thermoresponsive polymers are interesting candidates for various applications including drug delivery, nanomembranes and temperature-controlled catalysis. Based on the volume phase transition temperature (VPTT), at which the particles undergo a dramatic decrease of volume, the properties of the material can be controlled by adjusting the temperature. However, examining the kinetics of such structural changes by fast temperature jumps is a challenge, especially to lower temperatures. Having shown that the VPTT of poly-(N-n-proplyacrylamid) (PNNPAM) can be shifted by 1.5 K to higher temperatures applying 300 bar, it is possible to access both the swollen and the dehydrated state at 300 and 1 bar, respectively, by choosing a temperature slightly above the VPTT at 1 bar. The narrow transition range of PNNPAM enables to clearly distinguish between both states. Performing pressure jumps between the two states should give detailed insights into the kinetics of structural changes. Thereby, the benefit of pressure is that it appears homogeneously and can be applied repeatedly in both directions. Thus, we propose to study swelling and deswelling kinetics of PNNPAM and related polymers.
Please note that you will need to login with your ILL credentials to download the data.
Download DataThe recommended format for citing this dataset in a research publication is in the following format:
PUETZ Yvonne; HANNAPPEL Yvonne; HELLWEG Thomas; LUELSDORF Stefan; SCHWEINS Ralf; SOTTMANN DIANA; SOTTMANN Thomas; STREY Reinhard and WREDE Oliver. (2015). Kinetics of pressure-induced structural changes of thermoresponsive poly-N-n-propylacrylamide and related polymers. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1754
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.