Nanostructured high-performance dielectric block copolymers

2015 ◽  
Vol 51 (83) ◽  
pp. 15320-15323 ◽  
Author(s):  
Wenmei Liu ◽  
Xiaojuan Liao ◽  
Yawei Li ◽  
Qiuhua Zhao ◽  
Meiran Xie ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Hollow Sphere ◽  
High Performance ◽  
Interfacial Polarization ◽  
Metathesis Polymerization

A dielectric block copolymer was synthesized by metathesis polymerization. It self-assembles into micelle or hollow sphere nanostructures, which exhibit excellent dielectric properties due to dipolar and interfacial polarization contributions.

High-performance poly(acrylic acid) hydrogels formed with a block copolymer crosslinker containing amino-acid derivatives

Soft Matter ◽  
2019 ◽  
Vol 15 (37) ◽  
pp. 7381-7389 ◽  
Author(s):  
Rui Zhang ◽  
Hengzhi Ruan ◽  
Tianxu Zhou ◽  
Qionglong Fu ◽  
Hongwei Peng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Amino Acid ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Acrylic Acid ◽  
High Performance ◽  
Amino Acid Derivatives ◽  
Self Healing ◽  
Poly Acrylic Acid

Two block copolymers containing amino-acid derivatives were employed as a macro-crosslinker to prepare high performance PAA hydrogels concluding desirable mechanical properties and self-healing abilities, as well as notch-insensitivity.

scholarly journals Ring opening metathesis polymerization-derived block copolymers bearing chelating ligands: synthesis, metal immobilization and use in hydroformylation under micellar conditions

2010 ◽  
Vol 6 ◽  
Author(s):  
Gajanan M Pawar ◽  
Jochen Weckesser ◽  
Siegfried Blechert ◽  
Michael R Buchmeiser
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Ring Opening ◽  
Supported Catalyst ◽  
Chelating Ligands ◽  
Metathesis Polymerization ◽  
Metal Immobilization ◽  
Polymer Supported ◽  
Copolymer Poly ◽  
Set Up

Norborn-5-ene-(N,N-dipyrid-2-yl)carbamide (M1) was copolymerized with exo,exo-[2-(3-ethoxycarbonyl-7-oxabicyclo[2.2.1]hept-5-en-2-carbonyloxy)ethyl]trimethylammonium iodide (M2) using the Schrock catalyst Mo(N-2,6-Me2-C6H3)(CHCMe2Ph)(OCMe(CF3)2)2 [Mo] to yield poly(M1-b-M2). In water, poly(M1-b-M2) forms micelles with a critical micelle-forming concentration (cmc) of 2.8 × 10−6 mol L−1; Reaction of poly(M1-b-M2) with [Rh(COD)Cl]2 (COD = cycloocta-1,5-diene) yields the Rh(I)-loaded block copolymer poly(M1-b-M2)-Rh containing 18 mg of Rh(I)/g of block copolymer with a cmc of 2.2 × 10−6 mol L−1. The Rh-loaded polymer was used for the hydroformylation of 1-octene under micellar conditions. The data obtained were compared to those obtained with a monomeric analogue, i.e. CH3CON(Py)2RhCl(COD) (C1, Py = 2-pyridyl). Using the polymer-supported catalyst under micellar conditions, a significant increase in selectivity, i.e. an increase in the n:iso ratio was accomplished, which could be further enhanced by the addition of excess ligand, e.g., triphenylphosphite. Special features of the micellar catalytic set up are discussed.

A high-performance dielectric block copolymer with a self-assembled superhelical nanotube morphology

2017 ◽  
Vol 8 (4) ◽  
pp. 725-734 ◽  
Author(s):  
Wenmei Liu ◽  
Jie Chen ◽  
Dandan Zhou ◽  
Xiaojuan Liao ◽  
Meiran Xie ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Block Copolymer ◽  
High Performance ◽  
Self Assembled

A block copolymer consisting of functional polynorbornene and polyacetylene segments was self-assembled into a superhelical nanotube, and displayed good dielectric properties.

scholarly journals ROMPI-CDSA: ring-opening metathesis polymerization-induced crystallization-driven self-assembly of metallo-block copolymers

2019 ◽  
Vol 10 (42) ◽  
pp. 9782-9787 ◽  
Author(s):  
Ye Sha ◽  
Md Anisur Rahman ◽  
Tianyu Zhu ◽  
Yujin Cha ◽  
C. Wayne McAlister ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Self Assembly ◽  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
One Pot ◽  
Metathesis Polymerization ◽  
Induced Crystallization

Two most prevailing self-assembly methods, PISA and CDSA, are combined in one metallo-block copolymer system via one-pot synchronous ROMP, yielding crystalline nanostructures in a mild, fast, scalable and controlled manner.

Simultaneously toughening and strengthening cyanate ester resin with better dielectric properties by building nanostructures in its crosslinked network using polyimide-block-polysiloxane rod-coil block copolymers

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 49436-49447 ◽  
Author(s):  
Yayi Ye ◽  
Li Yuan ◽  
Guozheng Liang ◽  
Aijuan Gu
Keyword(s):  
Dielectric Properties ◽  
Block Copolymers ◽  
High Performance ◽  
Cyanate Ester ◽  
Cyanate Ester Resin ◽  
Cyanate Ester Resins

The fabrication and origin of high performance cyanate ester resins by building nanostructures in its crosslinked network with polyimide-block-polysiloxane block copolymers.

Interfacial polarization-induced high-k polymer dielectric film for high-performance triboelectric devices

Nano Energy ◽  
2021 ◽  
Vol 82 ◽  
pp. 105697
Author(s):  
Minsoo P. Kim ◽  
Chang Won Ahn ◽  
Youngsu Lee ◽  
Kyoungho Kim ◽  
Jonghwa Park ◽  
...  
Keyword(s):  
High Performance ◽  
Dielectric Film ◽  
Interfacial Polarization ◽  
Polymer Dielectric ◽  
High K

scholarly journals Microstructure and dielectric properties of sub‐micron hollow sphere (Ba 0.6 Sr 0.4 )TiO 3 /PVDF composites

2019 ◽  
Vol 2 (4) ◽  
pp. 135-141 ◽  
Author(s):  
Yiting Guo ◽  
Kena Zhang ◽  
Nan Meng ◽  
Wanli Wu ◽  
Yujian Wang ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Hollow Sphere
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