Crystallization Temperature as the Probe to Detect Polymer-Filler Compatibility in the Poly(ε-caprolactone) Composites with Acetylated Cellulose Nanocrystal
writer：Chunjiang Xu, Defeng Wu, Qiaolian Lv, Lili Yan
keywords：Poly(ε-caprolactone); Cellulose Nanocrystal; Composites; Compatibility; Crystallization Temperature
source：期刊
specific source：Journal of Physical Chemistry C
Issue time：2017年
Journal of Physical Chemistry C, 2017, 121, 18615-18624
ABSTRACT:
Poly(ε-caprolactone) composites containing the acetylated cellulose
nanocrystal (aCNC) with various degrees
of substitution (DS) were prepared for the phase compatibility study. An
interesting phenomenon around the alteration of
crystallization temperature (Tc) was reported here. Tc of PCL increases evidently in the presence of pristine CNC
(DS=0) due to its nucleation effect. But for the composites with aCNCs, Tc decreases monotonously
with increasing DSs of aCNCs,
and is even lower than that of the neat PCL at higher DSs. This is attributed
to the improved compatibility between the matrix and particles, which is
further evaluated by the Flory-Huggins
parameters. Therefore, the
alteration of Tc can be
used as the probe to detect the compatibility between two phases in aliphatic polyester
composites with chemically modified CNCs. From another perspective, crystallization of aliphatic polyesters can be controlled using aCNCs
with different DSs.
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http://pubs.acs.org/doi/10.1021/acs.jpcc.7b05055