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@ARTICLE{Zardalidis:825863,
author = {Zardalidis, George and Mars, Julian and Allgaier, J. and
Mezger, Markus and Richter, Dieter and Floudas, George},
title = {{I}nfluence of chain topology on polymer crystallization:
poly(ethylene oxide) ({PEO}) rings vs. linear chains},
journal = {Soft matter},
volume = {12},
number = {39},
issn = {1744-6848},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2017-00147},
pages = {8124 - 8134},
year = {2016},
abstract = {The absence of entanglements, the more compact structure
and the faster diffusion in melts of cyclic poly(ethylene
oxide) (PEO) chains have consequences on their
crystallization behavior at the lamellar and spherulitic
length scales. Rings with molecular weight below the
entanglement molecular weight (M < Me), attain the
equilibrium configuration composed from twice-folded chains
with a lamellar periodicity that is half of the
corresponding linear chains. Rings with M > Me undergo
distinct step-like conformational changes to a crystalline
lamellar with the equilibrium configuration. Rings melt from
this configuration in the absence of crystal thickening in
sharp contrast to linear chains. In general, rings more
easily attain their extended equilibrium configuration due
to strained segments and the absence of entanglements. In
addition, rings have a higher equilibrium melting
temperature. At the level of the spherulitic superstructure,
growth rates are much faster for rings reflecting the faster
diffusion and more compact structure. With respect to the
segmental dynamics in their semi-crystalline state, ring
PEOs with a steepness index of ∼34 form some of the
“strongest” glasses.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1},
ddc = {530},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000385489100007},
doi = {10.1039/C6SM01622G},
url = {https://juser.fz-juelich.de/record/825863},
}