scholarly journals Diblock/Triblock Structural Transition and Sol-Gel Transition of Peptide/PEG Diblock Copolymer Having a Terminal Terpyridine Group Induced by Complexation with Metal Ion

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Satoshi Tanimoto ◽  
Yasushi Nakamura ◽  
Hitoshi Yamaoka ◽  
Yoshitsugu Hirokawa
Keyword(s):  
Aqueous Solution ◽  
Light Scattering ◽  
Ring Opening ◽  
Metal Ion ◽  
Structural Transition ◽  
Sol Gel ◽  
Ring Opening Polymerization ◽  
The Other ◽  
Sol Gel Transition ◽  
Gel Transition

Terpyridine-polyethyleneglycol-block-polyleucine block copolymer (tpy-PEG-PLeu) was synthesized by a ring-opening polymerization of L-leucine -carboxyanhydride. The copolymer complexed with ion and its aqueous solution showed a purple color as a result of the complexation. This complexation caused the diblock/triblock structural transition of the copolymer. The change of the aggregation behavior caused by the structural transition was observed by a dynamic light scattering apparatus. The diblock tpy-PEG-PLeu copolymer formed a micelle in the aqueous solution. On the other hand, the triblock-type copolymer, after the complexation, formed the micelle structures and huge aggregates, which is considered to be a network structure. The complexation of the diblock tpy-PEG-PLeu copolymer with Fe ion is consequently considered to be a trigger of the gelation.

Dynamic and Static Light Scattering Study on the Sol-Gel Transition of Resorcinol-Formaldehyde Aqueous Solution

2002 ◽  
Vol 245 (2) ◽  
pp. 391-396 ◽  
Author(s):  
Takuji Yamamoto ◽  
Takashi Yoshida ◽  
Tetsuo Suzuki ◽  
Shin R. Mukai ◽  
Hajime Tamon
Keyword(s):  
Aqueous Solution ◽  
Light Scattering ◽  
Sol Gel ◽  
Static Light Scattering ◽  
Resorcinol Formaldehyde ◽  
Scattering Study ◽  
Sol Gel Transition ◽  
Gel Transition

Light-scattering studies on the sol–gel transition in aqueous solutions of poly(vinyl alcohol)

1986 ◽  
Vol 24 (2) ◽  
pp. 303-311 ◽  
Author(s):  
Motoko Komatsu ◽  
Takashi Inoue ◽  
Keizo Miyasaka
Keyword(s):  
Light Scattering ◽  
Aqueous Solutions ◽  
Vinyl Alcohol ◽  
Sol Gel ◽  
Poly Vinyl Alcohol ◽  
Sol Gel Transition ◽  
Gel Transition

scholarly journals DYNAMICAL ASPECTS OF SOL-GEL TRANSITION IN AN AQUEOUS SOLUTION OF POLY (VINYL ALCOHOL)

1984 ◽  
Vol 40 (4-5) ◽  
pp. T158-T160
Author(s):  
Motoko Komatsu ◽  
Takashi Inoue ◽  
Keizo Miyasaka
Keyword(s):  
Aqueous Solution ◽  
Vinyl Alcohol ◽  
Sol Gel ◽  
Poly Vinyl Alcohol ◽  
Sol Gel Transition ◽  
Gel Transition

Time-Resolved Small Angle X-Ray Scattering and Dynamic Light Scattering Studies of Sol-Gel Transition in Gelatin

1988 ◽  
Vol 143 ◽  
Author(s):  
Dan Q. Wu ◽  
Benjamin Chu
Keyword(s):  
Light Scattering ◽  
Cross Section ◽  
Sol Gel ◽  
Slow Mode ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Saxs Intensity ◽  
Sol Gel Transition ◽  
Gel Transition

AbstractStructural and dynamical properties of an aqueous gelatin solution (5 wt%, 0.1M NaCi, pH=7) in a sol-gel transition were studied by time-resolved small angle x-ray scattering (SAXS) and dynamic light scattering (DLS) after quenching the gelatin sol at ∼45”C to 11°C. SAXS intensity measurements suggested the presence of gel fibrils which grew initially in cross-section. The average cross-section of the gel fibrils reached a constant value after an initial growth period of ∼800 sec. Further increase in SAXS intensity could be attributed to the increase in the length of the gel fibrils. Photon correlation, on the other hand, clearly showed two relaxation modes in both the sol and the gel (∼1 hr after the quenching process) states: a fast cooperative diffusion mode which remained constant from the sol to the gel state after correction for the temperature dependence of solvent viscosity; and a slow mode that could be attributed to the self-diffusion of the “free” gelatin chains and aggregates. The slow mode contribution to the time correlation function was reduced from ∼40% in sol to ∼20% in gel signaling a decrease but not the elimination of “free” particles in the gel network. The decrease in the intensity contribution by the slow mode is, however, accompanied by a large increase in the characteristic line-width distribution.

scholarly journals DYNAMIC LIGHT SCATTERING STUDIES OF SOL-GEL TRANSITION IN AQUEOUS ALGINATE SOLUTION INDUCED BY CALCIUM CATIONS

2009 ◽  
Vol 007 (3) ◽  
pp. 297-300
Author(s):  
Lu LU ◽  
Xinxing LIU ◽  
Fang ZENG ◽  
Zhen TONG
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Sol Gel ◽  
Alginate Solution ◽  
Calcium Cations ◽  
Sol Gel Transition ◽  
Gel Transition

Dielectric behavior during sol-gel transition of PEO-PPO-PEO triblock copolymer aqueous solution

2000 ◽  
Vol 43 (6) ◽  
pp. 497-504 ◽  
Author(s):  
M. J. Song ◽  
D. S. Lee ◽  
J. H. Ahn ◽  
D. J. Kim ◽  
S. C. Kim
Keyword(s):  
Aqueous Solution ◽  
Triblock Copolymer ◽  
Sol Gel ◽  
Dielectric Behavior ◽  
Sol Gel Transition ◽  
Gel Transition

Dynamic light scattering study of the sol-gel transition

1991 ◽  
Vol 24 (26) ◽  
pp. 6839-6842 ◽  
Author(s):  
Liqi Fang ◽  
Wyn Brown ◽  
Cestmir Konak
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Sol Gel ◽  
Scattering Study ◽  
Sol Gel Transition ◽  
Gel Transition

Sol-gel transition behavior of biodegradable three-arm and four-arm star-shaped PLGA-PEG block copolymer aqueous solution

2005 ◽  
Vol 44 (2) ◽  
pp. 888-899 ◽  
Author(s):  
Su Jeong Lee ◽  
Bo Ryeong Han ◽  
Sang Yeob Park ◽  
Dong Keun Han ◽  
Sung Chul Kim
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Sol Gel ◽  
Transition Behavior ◽  
Sol Gel Transition ◽  
Gel Transition

Probe Diffusion during Sol–Gel Transition of a Radical Polymerization System Using Isorefractive Dynamic Light Scattering

2017 ◽  
Vol 50 (24) ◽  
pp. 9726-9733 ◽  
Author(s):  
Nobuyuki Watanabe ◽  
Xiang Li ◽  
Mitsuhiro Shibayama
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Radical Polymerization ◽  
Sol Gel ◽  
Polymerization System ◽  
Sol Gel Transition ◽  
Gel Transition
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