Dynamic Light Scattering vs1H NMR Investigation of pH-Responsive Diblock Copolymers in Water

2006 ◽  
Vol 39 (15) ◽  
pp. 5106-5112 ◽  
Author(s):  
M. Vamvakaki ◽  
D. Palioura ◽  
A. Spyros ◽  
S. P. Armes ◽  
S. H. Anastasiadis
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Diblock Copolymers ◽  
Ph Responsive

Vesicles made of PS-PI cyclic diblock copolymers: In situ freeze-drying cryo-TEM and dynamic light scattering experiments

2005 ◽  
Vol 128 ◽  
pp. 163 ◽  
Author(s):  
Jean-Luc Putaux ◽  
Edson Minatti ◽  
Christelle Lefebvre ◽  
Redouane Borsali ◽  
Michel Schappacher ◽  
...  
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Freeze Drying ◽  
Diblock Copolymers

Dynamic Light Scattering from the Oriented Lamellar State of Diblock Copolymers:  The Undulation Mode

2001 ◽  
Vol 34 (4) ◽  
pp. 1090-1095 ◽  
Author(s):  
Petr Štěpánek ◽  
Frédéric Nallet ◽  
Kristoffer Almdal
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Diblock Copolymers

scholarly journals Temperature Behavior of Aqueous Solutions of Poly(2-Oxazoline) Homopolymer and Block Copolymers Investigated by NMR Spectroscopy and Dynamic Light Scattering

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1879
Author(s):  
Rafał Konefał ◽  
Peter Černoch ◽  
Magdalena Konefał ◽  
Jiří Spěváček
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Aqueous Solutions ◽  
1H Nmr ◽  
Conformational Changes ◽  
Diblock Copolymers ◽  
Relaxation Times ◽  
Temperature Behavior ◽  
Copolymer Composition

1H NMR methods in combination with dynamic light scattering were applied to study temperature behavior of poly(2-isopropyl-2-oxazoline) (PIPOx) homopolymer as well as PIPOx-b-poly(2-methyl-2-oxazoline) (PMeOx) and poly(2-ethyl-2-oxazoline) (PEtOx)-b-PMeOx diblock copolymers in aqueous solutions. 1H NMR spectra showed a different way of phase transition for the main and side chains in PIPOx-based solutions. Additionally, the phase transition is irreversible for PIPOx homopolymer and partially reversible for PIPOx-b-PMeOx copolymer. As revealed by NMR, the phase transition in PEtOx-based copolymers solutions exists despite the absence of solution turbidity. It is very broad, virtually independent of the copolymer composition and reversible with some hysteresis. Two types of water molecules were detected in solutions of the diblock copolymers above the phase transition—“free” with long and “bound” with short spin–spin relaxation times T2. NOESY spectra revealed information about conformational changes observed already in the pre-transition region of PIPOx-b-PMeOx copolymer solution.

scholarly journals Synthesis of polyampholytic diblock copolymers via RAFT aqueous solution polymerization

2021 ◽  
Author(s):  
S. M. North ◽  
S. P. Armes
Keyword(s):  
Aqueous Solution ◽  
Light Scattering ◽  
Nmr Spectroscopy ◽  
Dynamic Light Scattering ◽  
Diblock Copolymers ◽  
Solution Polymerization ◽  
H Nmr ◽  
Aqueous Solution Polymerization ◽  
Solution Behaviour

Two new classes of polyampholytic diblock copolymers are prepared via RAFT aqueous solution polymerization and their aqueous solution behaviour is assessed using 1H NMR spectroscopy, dynamic light scattering and aqueous electrophoresis measurements.

Dynamic light scattering from gels in a poor solvent

1978 ◽  
Vol 39 (9) ◽  
pp. 955-960 ◽  
Author(s):  
E. Geissler ◽  
A.M. Hecht
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Poor Solvent

DYNAMIC LIGHT SCATTERING IN LC-440 NEMATIC LIQUID CRYSTAL

2014 ◽  
Vol 73 (11) ◽  
pp. 977-983
Author(s):  
A. P. Fedoryako ◽  
A. I. Kocherzhin ◽  
M. P. Kukhtin ◽  
E. I. Chernyakov
Keyword(s):  
Liquid Crystal ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Nematic Liquid Crystal
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