Thermoshrinking behavior of poly(vinylcaprolactam) gels in aqueous solution

The swelling of newly synthesized slightly crosslinked gels of polyvinylcaprolactam (PVCa) was studied as a function of temperature. In water, PVCa gels undergo a sharp volume transition from a swollen to a collapsed state on heating. In water/alcohol mixtures, the gel first shrinks and then expands...

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Published in:Macromolecular chemistry and physics 1996-06, Vol.197 (6), p.1973-1982
Main Authors: Makhaeva, Elena E., Thanh, Le Thi Minh, Starodoubtsev, Sergei G., Khokhlov, Alexei R.
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Language:English
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cited_by cdi_FETCH-LOGICAL-c4066-c516103f71ed100e6906db88574a44b0e9a7a2fd1640c80d9911252e7c2a19d23
cites cdi_FETCH-LOGICAL-c4066-c516103f71ed100e6906db88574a44b0e9a7a2fd1640c80d9911252e7c2a19d23
container_end_page 1982
container_issue 6
container_start_page 1973
container_title Macromolecular chemistry and physics
container_volume 197
creator Makhaeva, Elena E.
Thanh, Le Thi Minh
Starodoubtsev, Sergei G.
Khokhlov, Alexei R.
description The swelling of newly synthesized slightly crosslinked gels of polyvinylcaprolactam (PVCa) was studied as a function of temperature. In water, PVCa gels undergo a sharp volume transition from a swollen to a collapsed state on heating. In water/alcohol mixtures, the gel first shrinks and then expands as the temperature is raised. The swelling behavior of the thermosensitive PVCa gel in surfactant solution depends on kind and concentration of the surfactant. Normally, an additional swelling of the gel is observed in the presence of ionic surfactants. Addition of the surfactant raises the collapse transition temperature of the gel. Absorption of the surfactant by the PVCa gel as a function of temperature and surfactant concentration is analysed in detail.
doi_str_mv 10.1002/macp.1996.021970616
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title Thermoshrinking behavior of poly(vinylcaprolactam) gels in aqueous solution
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