Lianwei Li's Ph.D. thesis solves a long-standing problem in polymer
physics: how does a hyperbranched chain pass through a cylindrical
pore smaller than its size under an elongational flow field? The
question was asked by the Nobel Laureate, the late Professor de
Gennes in the 70s but has never been seriously addressed through
real experiments. This thesis outlines how Lianwei Li developed a
novel polymerization strategy using a seesaw-type macromonomer to
prepare a set of "defect-free" hyperbranched chagins with different
overall molar masses and controllable uniform subchain lengths. The
author then unearthed how the critical (minimum) flow rate at which
a hyperbranched chain can pass through the pore, is dependent on
the overall molar mass and the subchain length. The experimental
results give a unified description of polymer chains with different
topologies passing through a small cylindrical pore, which enables
us to separate chains by their topologies instead of their sizes in
ultrafiltration. In addition, this research also reveals how the
chain structure of amphiphilic hyperbranched block and graft
copolymers affect their solution properties, including the
establishments of several classic scaling laws that relate the
chain size and the intrinsic viscosity to the overall molar mass
and the subchain length, respectively. This work has led to
numerous publications in high-impact peer-reviewed journals.
General
| Imprint: |
Springer International Publishing AG
|
| Country of origin: |
Switzerland |
| Series: |
Springer Theses |
| Release date: |
September 2016 |
| First published: |
2014 |
| Authors: |
Lianwei Li
|
| Dimensions: |
235 x 155 x 8mm (L x W x T) |
| Format: |
Paperback
|
| Pages: |
128 |
| Edition: |
Softcover reprint of the original 1st ed. 2014 |
| ISBN-13: |
978-3-319-35999-1 |
| Categories: |
Books
Promotions
|
| LSN: |
3-319-35999-1 |
| Barcode: |
9783319359991 |
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