Supramolecular Chemistry in the Formation of Self-Assembled Nanostructures from a High-Molecular-Weight Rod-Coil Block Copolymer

2014 ◽  
Vol 35 (20) ◽  
pp. 1795-1800 ◽  
Author(s):  
Yingfeng Tu ◽  
Zhichao Ji ◽  
Xiaoming Yang ◽  
Xinhua Wan ◽  
Qi-Feng Zhou
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Supramolecular Chemistry ◽  
High Molecular Weight ◽  
Self Assembled

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

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

Self-Assembly of Block Copolymers for Photonic-Bandgap Materials

MRS Bulletin ◽  
2005 ◽  
Vol 30 (10) ◽  
pp. 721-726 ◽  
Author(s):  
Jongseung Yoon ◽  
Wonmok Lee ◽  
Edwin L. Thomas
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Photonic Crystals ◽  
Liquid Crystalline ◽  
Photonic Bandgap ◽  
Photonic Bandgap Materials ◽  
Periodic Microstructures ◽  
Self Assembled ◽  
Bandgap Materials

AbstractSelf-assembled block copolymer systems with an appropriate molecular weight to produce a length scale that will interact with visible light are an alternative platform material for the fabrication of large-area, well-ordered photonic-bandgap structures at visible and near-IR frequencies.Over the past years, one-, two-, and three-dimensional photonic crystals have been demonstrated with various microdomain structures created through microphase separation of block copolymers. The size and shape of periodic microstructures of block copolymers can be readily tuned by molecular weight, relative composition of the copolymer, and blending with homopolymers or plasticizers.The versatility of photonic crystals based on block copolymers is further increased by incorporating inorganic nanoparticles or liquid-crystalline guest molecules (or using a liquid-crystalline block), or by selective etching of one of the microdomains and backfilling with high-refractive-index materials. This article presents an overview of photonic-bandgap materials enabled by self-assembled block copolymers and discusses the morphology and photonic properties of block-copolymer-based photonic crystals containing nanocomposite additives.We also provide a view of the direction of future research, especially toward novel photonic devices.

Tribomechanical Properties of Polymeric Composites Based on Mixture of Ultra High Molecular Weight Polyethylene and Polyamide

2015 ◽  
Vol 770 ◽  
pp. 87-92
Author(s):  
Sergey Panin ◽  
Lyudmila А. Kornienko ◽  
Nguyen Xuan Thuc ◽  
Larisa R. Ivanova ◽  
Mikhail A. Poltaranin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Sliding Friction ◽  
Polymeric Composites ◽  
Flow Index ◽  
Dry Sliding ◽  
Dry Sliding Friction ◽  
Ultra High Molecular Weight

In order to find out optimum filler to increase manufacturability (extrudability) of composites based on ultra-high molecular weight polyethylene (UHMWPE) matrix as well as to develop polymer-polymeric composites with improved tribological characteristics, the structure, mechanical properties and wear resistance of UHMWPE mixtures with elasticizing block-copolymer PA-b-LLDPE (UHMWPE + PA-b-LLDPE) was investigated under dry sliding friction. Applied aspect of the study is related to the selection of commercially available fillers being compatible with UHMWPE for manufacturing anti-frictional extrudable nanocomposites. It is shown that as compared with pure UHMWPE mechanical properties (ultimate strength, value of elongation at failure) do not vary substantially, but the wear rate under dry sliding friction of polymeric composites UHMWPE + n wt.% PA-b-LLDPE is reduced only when block copolymer weight fraction is less than ≤ 5 wt.%. By the polymeric filling an important technological characteristic - specific pressure of extrusion (that is proportional to melt flow index) might be decreased. Permolecular structure and wear track surfaces of polymer-polymer composites UHMWPE + n wt.% PA-b-LLDPE was examined and numerically characterized.

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