7 research outputs found
Manipulating the Filler Network Structure and Properties of Polylactide/Carbon Black Nanocomposites with the Aid of Stereocomplex Crystallites
Construction
of various filler networks is an important issue for
developing high-performance and multifunctional polymer nanocomposites.
In this work, we report a facile and effective strategy to manipulate
the filler network structure and properties of polyÂ(l-lactide)/carbon
black (PLLA/CB) nanocomposites with the aid of stereocomplex (SC)
crystallization between PLLA matrix and small amounts of polyÂ(d-lactide) (PDLA). The results reveal that the incorporation
of only 1 wt % PDLA can facilitate the formation of CB network in
PLLA/CB nanocomposites because SC crystallites induced enhancement
in the melt viscosity of PLLA matrix could depress CB aggregation,
finally leading to an evident decease in the electrical percolation
threshold (φ<sub><i>c</i></sub>). However, with further
increasing PDLA concentration to 10 wt %, the SC crystallites could
organize into a dense network in the matrix and then serve as physical
barrier for the networking of CB nanoparticles. As a result, the φ<sub><i>c</i></sub> of the nanocomposites increases sharply.
The outstanding nucleating and strengthening effects of such SC crystallites
on the nanocomposites are also highlighted. These findings suggest
that the formation of SC crystallites could be a promising solution
to create PLLA-based nanocomposites with tunable filler networks and
properties
Kaplan-Meier survival curves by the presence of SRCs.
<p>Kaplan-Meier survival curves by the presence of SRCs.</p
Characteristics of the patients according to the therapy group.
<p>Characteristics of the patients according to the therapy group.</p
Univariate analysis of the 57 patients with primary esophageal carcinoma containing ≥50%SRCs.
<p>Univariate analysis of the 57 patients with primary esophageal carcinoma containing ≥50%SRCs.</p
Perioperative and histopathological variables of the resected specimen.
<p>Perioperative and histopathological variables of the resected specimen.</p
Hematoxylin and eosin—Stained section (200 magnification) of a biopsy specimen showing (A) SRC≥50% and (B) SRC<50%, and (C) poorly differentiated adenocarcinoma (reference group).
<p>Hematoxylin and eosin—Stained section (200 magnification) of a biopsy specimen showing (A) SRC≥50% and (B) SRC<50%, and (C) poorly differentiated adenocarcinoma (reference group).</p