Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session A50: Chirality in Polymers and Soft Matter I: From Molecular to Hierarchical Scales
8:00 AM–11:00 AM,
Monday, March 4, 2019
BCEC
Room: 252B
Sponsoring
Units:
DPOLY GSOFT DBIO
Chair: Nicholas Kotov, University of Michigan
Abstract: A50.00011 : Aligning stem orientation: confined chiral and epitaxial growth of the α-phase crystals of isotactic polypropylene*
10:00 AM–10:12 AM
Presenter:
Yan Cao
(Institute for Advanced Study, Shenzhen University)
Authors:
Yan Cao
(Institute for Advanced Study, Shenzhen University)
Xingming Zeng
(Institute for Advanced Study, Shenzhen University)
Hiroshi Jinnai
(Insterdiscipline Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University)
Shuailin Zhang
(Department of polymer science, The University of Akron)
In the past, soft materials under soft or hard confinement have been extensively studied due to size effect at a small scale. Polymer nanorods confined to the anodic aluminum oxide (AAO) template have been examined in terms of crystal nucleation and orientation. So far, few molecular studies have been done on the polymer nanostructure under cylindrical confinement. In this research, we have fabricated isotactic polypropylene (i-PP) into a rod-shaped nanomaterial. We carried out 2D wide-angle x-ray diffraction (WAXD) and electron diffraction (ED) experiments of transmission electron microscopy (TEM) to analyze the chiral and epitaxial growth effect on hierarchical structure of i-PP nanorod. We found that stems of mother lamellae prefer to align with the rod long-axis (nanopore axis of AAO) and stems of daughter lamellar tilt 100 degree clockwise or counterclockwise with respect to the rod long-axis under 2D confinement.
*This work was supported by the Foundation of Shenzhen Peacock Talent (827-000150), National Science Foundation of China (802-008992), Shenzhen Science and Technology Innovation Foundation (85135-000017) and Guangdong Natural Science Foundation (85118-000036).
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