Expanding the morphology library of block copolymer self-assemblies with clews of tubules

2017 ◽  
Vol 53 (36) ◽  
pp. 5005-5008 ◽  
Author(s):  
Xiao-Li Sun ◽  
Dong-Ming Liu ◽  
Pan Wang ◽  
Jia-Lin Tan ◽  
Kang-Kang Li ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Self Assembly ◽  
High Asymmetry ◽  
Very High

Clews of tubules are reported via block copolymer self-assembly of P4VP-b-PS with both high asymmetry and very high molecular weight.

scholarly journals Giant Gyroid and Templates from High-Molecular-Weight Block Copolymer Self-assembly

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Sungmin Park ◽  
Yeongsik Kim ◽  
Hyungju Ahn ◽  
Jong Hak Kim ◽  
Pil J. Yoo ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Self Assembly

scholarly journals Hyperbranched polydendrons: a new controlled macromolecular architecture with self-assembly in water and organic solvents

2014 ◽  
Vol 5 (5) ◽  
pp. 1844-1853 ◽  
Author(s):  
Fiona L. Hatton ◽  
Pierre Chambon ◽  
Tom O. McDonald ◽  
Andrew Owen ◽  
Steven P. Rannard
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Organic Solvents ◽  
Self Assembly ◽  
Hybrid Copolymer ◽  
Macromolecular Architecture ◽  
Very High

A new macromolecular architecture comprising multiple linear-dendritic hybrid copolymer sub-units is presented – hyperbranched polydendrons. The materials are very high molecular weight and disperse but undergo extremely uniform self-assembly behaviour.

Morphology, directed self-assembly and pattern transfer from a high molecular weight polystyrene-block-poly(dimethylsiloxane) block copolymer film

2017 ◽  
Vol 28 (14) ◽  
pp. 145301 ◽  
Author(s):  
Li-Chen Cheng ◽  
Wubin Bai ◽  
Eduardo Fernandez Martin ◽  
Kun-Hua Tu ◽  
Konstantinos Ntetsikas ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Self Assembly ◽  
Copolymer Film ◽  
Pattern Transfer

Role of High‐Molecular‐Weight Homopolymers on Block Copolymer Self‐Assembly: From Morphology Modifier to Template

2018 ◽  
Vol 220 (3) ◽  
pp. 1800443 ◽  
Author(s):  
Shuo Zhang ◽  
Chunhua Cai ◽  
Zhanwen Xu ◽  
Jiaping Lin ◽  
Xiao Jin
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Self Assembly

Structural Reorganization in Thin Films of High Molecular Weight Block Copolymer Self-Assembly

2013 ◽  
Vol 853 ◽  
pp. 53-56
Author(s):  
Sung Min Park ◽  
Hyung Ju Ahn ◽  
Sang Woo Kim ◽  
Jin Sam Gong ◽  
Du Yeol Ryu
Keyword(s):  
Thin Films ◽  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Thermal Annealing ◽  
Self Assembly ◽  
Film Surface ◽  
Structural Reorganization ◽  
Solvent Vapor ◽  
Lamellar Morphology

We demonstrate the structural reorganization of microdomain arrays toward the perpendicular orientation of lamellar morphology in high-molecular-weight PS-b-PMMA films using a combinational approach by solvent-vapor and sequential thermal annealing processes. Solvent annealing with a PMMA-selective acetone vapor induced a cylindrical morphology. However, the sequential thermal annealing of block copolymer (BCP) films led to structural reorganization to an equilibrium lamellar morphology, where the lamellar microdomains were oriented to normal to the film surface. This technique suggests an efficient route for directing orientation and structural reorganization of microdomain arrays in the thin films of high-molecular-weight BCP self-assembly.

scholarly journals The multiple complexes formed by the interaction of platelet factor 4 with heparin

1980 ◽  
Vol 191 (3) ◽  
pp. 769-776 ◽  
Author(s):  
P E Bock ◽  
M Luscombe ◽  
S E Marshall ◽  
D S Pepper ◽  
J J Holbrook
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Chain Length ◽  
Salt Concentration ◽  
Human Platelet ◽  
Platelet Factor 4 ◽  
High Protein ◽  
Platelet Factor ◽  
The Stability ◽  
Very High

The anisotropy of the fluorescence of dansyl (5-dimethylaminonaphthalene-1- sulphonyl) groups covalently attached to human platelet factor 4 was used to detect the macromolecular compounds formed when the factor was mixed with heparin. At low heparin/protein ratios a very-high-molecular-weight compound (1) was formed that dissociated to give a smaller compound (2) when excess heparin was added. 2. A large complex was also detected as a precipitate that formed at high protein concentrations in chloride buffer. It contained 15.7% (w/w) polysaccharide, equivalent to four or five heparin tetrasaccharide units per protein tetramer. In this complex, more than one molecule of protein binds to each heparin molecule of molecular weight greater than about 6 × 10(3).3. The stability of these complexes varied with pH, salt concentration and the chain length of the heparin. The limit complexes found in excess of the larger heparins consisted of only one heparin molecule per protein tetramer, and the failure to observe complexes with four heparin molecules/protein tetramer is discussed.

scholarly journals Facile Synthesis of a High Molecular Weight Amphiphilic Aramid–ROMP Block Copolymer

2017 ◽  
Vol 50 (23) ◽  
pp. 9307-9314 ◽  
Author(s):  
Michael Badoux ◽  
Susanne Drechsler ◽  
Subhajit Pal ◽  
Andreas F. M. Kilbinger
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Facile Synthesis

Mixing of Carbon Black with Rubber. VI. Analysis of NR/SBR Blends

1988 ◽  
Vol 61 (4) ◽  
pp. 609-618 ◽  
Author(s):  
George R. Cotten ◽  
Lawrence J. Murphy
Keyword(s):  
Molecular Weight ◽  
Carbon Black ◽  
High Molecular Weight ◽  
Surface Area ◽  
Bound Rubber ◽  
Very High

Abstract The distribution of carbon black in NR/SBR blends was determined through the analysis of bound rubber. The NR/SBR blends were found to be very different from the previously studied SBR/BR compounds: these differences were assigned to mutual insolubility of the two polymers and a very high molecular weight of NR. In NR/SBR blends, it was found that changes in molecular weight of the polymer has no effect on the carbon black distribution in the blend. While the “activity” of carbon black did not affect the distribution, the loading of the black in NR decreased linearly with increasing surface area of the black. Approximately 35% of normal tread blacks (surface area 80–100 m2/g) was found in the NR phase. However, the bond between NR and carbon black is quite weak, and black continues to migrate into the SBR phase on prolonged mixing or during blending of NR and SBR masterbatches.

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