scholarly journals Amphiphilic random and random block terpolymers with PEG, octadecyl, and oleyl pendants for controlled crystallization and microphase separation

2021 ◽  
Author(s):  
Sahori Imai ◽  
Yasuyuki Ommura ◽  
Yuki Watanabe ◽  
Hiroki Ogawa ◽  
Mikihito Takenaka ◽  
...  
Keyword(s):  
Solid State ◽  
Microphase Separation ◽  
Random Block ◽  
Controlled Crystallization ◽  
Block Terpolymers ◽  
Control Crystallization

Amphiphilic random and random block terpolymers bearing PEG chains, crystalline octadecyl groups, and amorphous oleyl groups were designed to control crystallization and microphase separation in the solid state.

Study on Synthesis and Properties of Novel HTPB/PEG Polyurethane Copolymers

2011 ◽  
Vol 66-68 ◽  
pp. 170-173 ◽  
Author(s):  
Yan Ling Luo ◽  
Yan Miao ◽  
Feng Xu
Keyword(s):  
Microphase Separation ◽  
Coupling Reaction ◽  
Hydroxyl Groups ◽  
Sequence Structure ◽  
Reaction Route ◽  
In Vitro Degradation ◽  
Random Block ◽  
Separation Degree ◽  
Crystal Characterization

Two novel polyurethanes (PU) with alternating and random block architectures, hydroxyl-terminated polybutadiene (HTPB)/polyethylene glycol (PEG) block copolymers, HTPB-alt-PEG and HTPB-co-PEG, were synthesized via a coupling reaction route between hydroxyl groups and isocyanate groups. The structural and crystal characterization was conducted by means of FTIR, and phase behavior was examined by SEM and DSC. The biodegradation in a simulated human body fluid was investigated through mass loss and SEM. The experimental results indicate that all polyurethane samples form the microphase separation structure, and the separation degree depended on their sequence structure and the molecular weight (MW) of PEG, and further affecte their in-vitro degradation.

Star-Shaped Polymer Electrolyte with Microphase Separation Structure for All-Solid-State Lithium Batteries

2009 ◽  
Vol 156 (7) ◽  
pp. A577 ◽  
Author(s):  
Takeshi Niitani ◽  
Masato Amaike ◽  
Hiroyuki Nakano ◽  
Kaoru Dokko ◽  
Kiyoshi Kanamura
Keyword(s):  
Solid State ◽  
Polymer Electrolyte ◽  
Lithium Batteries ◽  
Microphase Separation ◽  
Star Shaped Polymer

scholarly journals High Electronically Conductive Tungsten Phosphate Glass-Ceramics

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2515
Author(s):  
Sanja Renka ◽  
Teodoro Klaser ◽  
Sanja Burazer ◽  
Petr Mošner ◽  
Petr Kalenda ◽  
...  
Keyword(s):  
Solid State ◽  
Phosphate Glass ◽  
Electronic Transport ◽  
Anode Materials ◽  
Glass Ceramics ◽  
Solid State Batteries ◽  
Controlled Crystallization ◽  
Wo3 Phases ◽  
Average Size ◽  
Insight Into

High electronically conductive tungsten phosphate glass-ceramics have been prepared by the controlled crystallization of binary 60WO3–40P2O5 glass in the temperature range from 700 to 935 °C and for 1 to 24 h. The substantial increase in the conductivity for four orders of magnitude is a result of the formation of electronically conductive W2O3(PO4)2 and WO3 phases. At low crystallization temperature the dominant W2O3(PO4)2 phase is created, whereas at 935 °C for 24 h the formation of semiconducting WO3 crystallites of an average size of 80 nm enhances the conductivity to the highest value of 1.64 × 10−4 (Ω cm)–1 at 30 °C. The course of the crystallization and its impact on this exceptionally high electronic transport of binary tungsten phosphate glass-ceramics has been discussed in detail. Since such highly electronically conductive WO3-based glass-ceramics have a great potential as cathode/anode materials in solid state batteries and as electrocatalysts in fuel cells, it is of interest to provide a novel insight into the improvement of their electrical properties.

Polymeric Nanoscale All-Solid State Battery

2001 ◽  
Vol 705 ◽  
Author(s):  
Steven E. Bullock ◽  
Peter Kofinas
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Cobalt Oxide ◽  
Triblock Copolymer ◽  
Microphase Separation ◽  
Spinel Phase ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Metal Anode ◽  
Poly Ethylene

AbstractThe advent of polymer electrolytes has provided a promising route to an all solid-state polymer battery. Such a battery would have greater safety, without potential discharge of liquid or gel electrolyte. Current battery configurations typically involve a metal anode, a solvent-plasticized polyelectrolyte, such as poly (ethylene oxide) (PEO), and a composite cathode. We have synthesized an A/B/C triblock copolymer which could have potential use as an all-solid state nanoscale polymer lithium battery. The polymeric battery was synthesized with an anode, electrolyte and cathode by synthesizing an A/B/C triblock copolymer whose microphase separation would form lamellar domains. These nanodomains contain cobalt oxide, a derivative of PEO synthesized by ring opening metathesis polymerization, and a spinel phase LiMn2O4 as the anode, electrolyte and cathode material, respectively. The first block contains cobalt oxide that stores lithium ion in a novel electrochemical reaction that allows use in a battery configuration. The second block is polyethylene oxide derived from an unsaturated crown ether, and is used for its high ionic conductivity. The third block contains LiMn2O4, which is currently being investigated as a potential cathode material because of its low toxicity and ease of preparation. The nanometer size domains in the battery can be used in unique applications in microelectronics. In addition, such size scale allows use of the battery in discrete circuits, reducing the amount of wiring necessary in conventional battery configurations.

Self-assembly of amphiphilic block pendant polymers as microphase separation materials and folded flower micelles

2019 ◽  
Vol 10 (36) ◽  
pp. 4954-4961 ◽  
Author(s):  
Mayuko Matsumoto ◽  
Mikihito Takenaka ◽  
Mitsuo Sawamoto ◽  
Takaya Terashima
Keyword(s):  
Solid State ◽  
Self Assembly ◽  
Microphase Separation ◽  
Amphiphilic Polymers ◽  
New Class ◽  
Self Assembled

Herein, we created amphiphilic polymers bearing hydrophilic/hydrophobic block pendants as a new class of self-assembled materials for microphase separation in the solid state and folded flower micelles in water.

Solid State NMR Studies of Ionically Conductive Non-Oxide Chalcogenide Glasses

1988 ◽  
Vol 135 ◽  
Author(s):  
Hellmut Eckert ◽  
Zhengming Zhang ◽  
J. H. Kennedy
Keyword(s):  
Solid State ◽  
Chalcogenide Glasses ◽  
Structural Information ◽  
Microphase Separation ◽  
Mas Nmr ◽  
Oxide Glasses ◽  
Nmr Studies ◽  
Rare Isotope ◽  
31P Mas Nmr ◽  
Lithium Nmr

AbstractThe utility of 29Si, 31 p, and 6.7 Li MAS-NMR at 7.05 T to provide structural information in non-oxide chalcogenide glasses is discussed in connection with experimental results obtained on the systems Li2 S-SiS2, Li2 S-SiS2 -P2S5, and Li2 S-P2 S5-B2 S329Si MAS-NMR data indicate that the principles governing glass formation in these systems are fundamentally different from those applicable to stoichiometry-analog oxide glasses. 31p MAS-NMR can be used to identify microphase-separation in glasses containing two network former constituents. The use of the rare isotope 6 Li instead of 7 Li offers the advantage of significantly improved spectroscopic resolution, enabling the presentation of the first comprehensive lithium NMR chemical shift scale in the solid state.

Sign in / Sign up

Export Citation Format

Share Document