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@ARTICLE{Baeza:825137,
author = {Baeza, Guilhem P. and Sharma, Ashwinikumar and Louhichi,
Ameur and Imperiali, Luna and Appel, Wilco P. J. and Fitié,
Carel F. C. and Lettinga, M.P. and Van Ruymbeke, Evelyne and
Vlassopoulos, Dimitris},
title = {{M}ultiscale organization of thermoplastic elastomers with
varying content of hard segments},
journal = {Polymer},
volume = {107},
issn = {0032-3861},
address = {Oxford},
publisher = {Elsevier Science},
reportid = {FZJ-2016-07614},
pages = {89 - 101},
year = {2016},
abstract = {Thermoplastic elastomers (TPEs) based on segmented
block-copolymers containing poly(tetrahydrofuran) (pTHF) and
terephthalate-based diamide groups (T4T) were synthesized
via polycondensation. While pTHF is known to be flexible and
amorphous at rest, the more rigid T4T crystallized in
different ways depending on both chain composition and
sample preparation conditions. Increasing the content of
hard-segments (HS) from 5 to $20\%$ in weight leads to a
substantial increase of the melting point Tm by more than 60
°C. We have systematically investigated the multiscale (1
Å - 50 nm) organization of the HSs (of fractions from $5\%$
to $20\%)$ by means of DSC, WAXS and (ultra) small angle
X-ray scattering (U)SAXS. By increasing HS content, hence
the rigidity of the chain, scattering experiments
unambiguously show the formation of bigger and better
defined ribbon-like crystallites, as well as the
densification of the network they form. We propose a
scenario for rationalizing the local T4T-HSs packing and the
crystallites anisotropy at the mesoscale (1–10 nm) for HS
fraction above $5\%.$ Moreover, following in-situ the
crystallization of TPEs with large HS fraction $(20\%),$ we
highlight the presence of “persistent aggregates”
present at T > Tm and study the ribbon-like crystallites
growth mechanism during cooling from the melt state.},
cin = {ICS-3},
ddc = {540},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000389765500011},
doi = {10.1016/j.polymer.2016.11.010},
url = {https://juser.fz-juelich.de/record/825137},
}