The same reversible change is seen for
pDMAPS, except that the polymer is immiscible below the upper
critical solution temperature (UCST). The UCST of pDMAPS has been
shown to have strong dependence on polymer chain length and
solution ionic strength [6], while the LCST of pNIPAm is less variable
[7], but still can be affected by several factors, such as degree of
chain branching and molecular weight [8].