indicating that pEtEtOx and pPrMeOx series homopolymers are indeed amorphous, which is consistent with the absence of a Tm in the DSC measurement. The two broad bands in the XRD are in a similar position as was found previously for p RS BuEtOx. Generally speaking, poly(2-n-alkyl-2-oxazoline)s with 4 or more carbon atoms in side-chain are found to be semicrystalline, while the POx with 1-3 carbon atoms in sidechain are amorphous, albeit crystallization can has been reported for those when aqueous solutions are kept above their respective LCST. Our data suggests, that the additional carbon atoms branching off of the main chain do not promote the formation of crystalline domains in case of POx with short sidechains, although we cannot rule out that under specific conditions, crystallization might occur.