Selectively degradable alternating copolymers of isobutyl vinyl ether and plant-derived aldehydes with acyclic side chains: Effects of side group structures on copolymerization behaviors

2013 ◽  
pp. n/a-n/a
Author(s):  
Yasushi Ishido ◽  
Arihiro Kanazawa ◽  
Shokyoku Kanaoka ◽  
Sadahito Aoshima
Keyword(s):  
Vinyl Ether ◽  
Side Chains ◽  
Side Group ◽  
Alternating Copolymers ◽  
Group Structures

Rate Control of Helix Oscillation of Poly(arylacetylene)s Achieved by Design of Side-Group Structures

2021 ◽  
Author(s):  
Yasuteru Mawatari ◽  
Muneki Oouchi ◽  
Yoshiaki Yoshida ◽  
Toshifumi Hiraoki ◽  
Masayoshi Tabata
Keyword(s):  
Rate Control ◽  
Side Group ◽  
Group Structures

Ferroelectric liquid crystalline side group polymers derived from mesogenic vinyl ether monomers

1995 ◽  
Vol 19 (5) ◽  
pp. 621-627 ◽  
Author(s):  
G. Scherowsky ◽  
U. Fichna ◽  
D. Wolff
Keyword(s):  
Vinyl Ether ◽  
Liquid Crystalline ◽  
Side Group

scholarly journals Gas Permeability of Star-Shaped Diblock Copoly(vinyl ether)s with Oxyethylene Side Chains

2016 ◽  
Vol 73 (3) ◽  
pp. 333-336 ◽  
Author(s):  
Ryoki OKUNAGA ◽  
Tamotsu HASHIMOTO ◽  
Michio URUSHISAKI ◽  
Toshikazu SAKAGUCHI
Keyword(s):  
Vinyl Ether ◽  
Gas Permeability ◽  
Side Chains

Tuning the luminescence efficiency by perfluorination of side chains in Eu3+ complexes with β-diketones of thiophene series

2021 ◽  
Author(s):  
Evgeniya Varaksina ◽  
Mikhail A. Kiskin ◽  
Konstantin A. Lyssenko ◽  
Lada N. Puntus ◽  
Vladislav Korshunov ◽  
...  
Keyword(s):  
Comparative Study ◽  
Thiophene Ring ◽  
Luminescent Properties ◽  
Side Chains ◽  
Side Group ◽  
Luminescence Efficiency ◽  
Thiophene Series ◽  
Gadolinium Complexes

A series of europium and gadolinium complexes comprising β-diketone moiety modified with a fluorinated side-group and thiophene ring have been designed, synthesized and a comparative study of their luminescent properties...

PEG-based Multifunctional Polyethers with Highly Reactive Vinyl-Ether Side Chains for Click-Type Functionalization

2011 ◽  
Vol 44 (16) ◽  
pp. 6326-6334 ◽  
Author(s):  
Christine Mangold ◽  
Carsten Dingels ◽  
Boris Obermeier ◽  
Holger Frey ◽  
Frederik Wurm
Keyword(s):  
Vinyl Ether ◽  
Side Chains

Synthesis and photovoltaic properties of thiophene–imide-fused thiophene alternating copolymers with different alkyl side chains

2011 ◽  
Vol 21 (33) ◽  
pp. 12454 ◽  
Author(s):  
Tomokazu Umeyama ◽  
Masaaki Oodoi ◽  
Osamu Yoshikawa ◽  
Takashi Sagawa ◽  
Susumu Yoshikawa ◽  
...  
Keyword(s):  
Side Chains ◽  
Photovoltaic Properties ◽  
Alternating Copolymers ◽  
Alkyl Side Chains

Static light scattering and transmission microscopy study of dilute Nafion solutions

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Liu Wen-Hong ◽  
Yu Ting-Yi ◽  
T. Leon Yu ◽  
Lin Hsiu-Li
Keyword(s):  
Light Scattering ◽  
Vinyl Ether ◽  
Microscopy Study ◽  
Static Light Scattering ◽  
Size Exclusion ◽  
Solubility Parameters ◽  
Dimethyl Formamide ◽  
Side Chains ◽  
Transmission Microscopy ◽  
Freeze Dried

AbstractNafion, an ionomer composed of perfluorocarbon backbone and vinyl ether side chains terminated with -SO3 - groups, has dual solubility parameters, i.e. δ1= 9.7 (cal/cm3)1/2 relating to perfluorocarbon backbones and δ2 = 17.3 (cal/cm3)1/2 relating to sulfonated vinyl ether side chains. It had been reported that Nafion molecules aggregated in dilute and semi-dilute water and alcohol solutions. In this study, we report static light scattering (SLS) measurements of dilute Nafion in N,N’- dimethyl formamide (DMF, solubility parameter δ =12.2 (cal/cm3)1/2, dielectric constant ε=36.7) and N,N’-dimethyl acetamide (DMAc, δ =10.8 (cal/cm3)1/2, ε=37.8) solutions with Nafion concentrations ranging from 0.2 mg/ml to 1.0 mg/ml. The DMF and DMAc solvents have δ closing to δ1 of Nafion perfluorocarbon backbones and ε much lower than water (ε =78). Thus DMF and DMAc are compatible with Nafion perfluorocarbon and few Nafion molecules aggregate in DMF and DMAc solvents when [Nafion]< 1.0 mg/ml. The lower ε of DMF and DMAc led to low polyelectrolyte effect of Nafion in these two solvents. The obtained Mws of present work were in good agreement with the Mw obtained from Nafion in dilute dimethyl sulfoxide (DMSO, δ =12.0 (cal/cm3)1/2, ε=46.6) solutions, reported by Lousenberg, using size exclusion chromatography incorporating static light scattering detection. The <RG> data obtained from SLS measurements were compared with the particles sizes of transmission electron microscope (TEM) observations of freeze dried Nafion thin films prepared on copper grids with 0.6 mg/ml Nafion solutions. Comparable results were obtained from these two observations.

Sign in / Sign up

Export Citation Format

Share Document