scholarly journals A Rational Entry to Cyclic Polymers via Selective Cyclization by Self-Assembly and Topology Transformation of Linear Polymers

2017 ◽  
Vol 139 (20) ◽  
pp. 6791-6794 ◽  
Author(s):  
Daisuke Aoki ◽  
Gouta Aibara ◽  
Satoshi Uchida ◽  
Toshikazu Takata
Keyword(s):  
Self Assembly ◽  
Linear Polymers ◽  
Cyclic Polymers ◽  
And Topology ◽  
Rational Entry

scholarly journals Adsorption and self-assembly of linear polymers on surfaces: a computer simulation study

Soft Matter ◽  
2009 ◽  
Vol 5 (3) ◽  
pp. 637-645 ◽  
Author(s):  
Alexandros Chremos ◽  
Emmanouil Glynos ◽  
Vasileios Koutsos ◽  
Philip J. Camp
Keyword(s):  
Computer Simulation ◽  
Simulation Study ◽  
Self Assembly ◽  
Linear Polymers ◽  
Computer Simulation Study

Controlling Self-Assembly and Topology at Micro–Nano Length Scales Using a Contact-Free Mixed Nanocolloid Droplet Architecture

Langmuir ◽  
2018 ◽  
Vol 34 (18) ◽  
pp. 5323-5333 ◽  
Author(s):  
Lijun T. Raju ◽  
Shubhankar Chakraborty ◽  
Binita Pathak ◽  
Saptarshi Basu
Keyword(s):  
Self Assembly ◽  
Length Scales ◽  
And Topology ◽  
Contact Free

SELF-ASSEMBLY AND FUNCTIONS OF CYCLIC POLYMERS

2013 ◽  
pp. 329-347
Author(s):  
Eisuke Baba ◽  
Takuya Yamamoto
Keyword(s):  
Self Assembly ◽  
Cyclic Polymers

Self-Assembly of Linear Polymers into Phosphorescent Nanoparticles: Optimization toward Non-Cytotoxic Bioimaging and Photonic Devices

2015 ◽  
Vol 119 (22) ◽  
pp. 12551-12561 ◽  
Author(s):  
Sreekar Marpu ◽  
Prabhat K. Upadhyay ◽  
Duong T. Nguyen ◽  
Iain W. H. Oswald ◽  
Ravi K. Arvapally ◽  
...  
Keyword(s):  
Self Assembly ◽  
Photonic Devices ◽  
Linear Polymers

scholarly journals Sugar decorated star-shaped (co)polymers with resveratrol-based core – physicochemical and biological properties

2022 ◽  
Author(s):  
Rafał Bielas ◽  
Paulina Maksym ◽  
Karol Erfurt ◽  
Barbara Hachuła ◽  
Robert Gawecki ◽  
...  
Keyword(s):  
Self Assembly ◽  
Reaction Pathway ◽  
Biological Properties ◽  
Cancer Therapies ◽  
Gene Carriers ◽  
And Topology ◽  
Physicochemical And Biological Properties ◽  
Or Gene ◽  
The Stability ◽  
First Time

AbstractStar-shaped glycopolymers due to the attractive combination of the physicochemical, morphological, self-assembly properties along with biological activity have gained increased attention as innovative agents in novel cancer therapies. Unfortunately, the production of these highly desirable biomaterials remains a challenge in modern macromolecular chemistry. The main reason for that is the low polymerizability of ionic glycomonomers originated from their steric congestion and the occurrence of ionic interactions that generally negatively influence the polymerization progress and hinder controllable reaction pathway. In this work, the new ionic sugar monomer was (co)polymerized for the first time via Activator Generated by Electron Transfer Atom Transfer Radical Polymerization (AGET ATRP) using a three-arm resveratrol-based core to obtain star-like (co)polymers. The obtained products were examined in terms of their physicochemical properties and morphology. Aside from the synthesis of these new glycopolymers, also a thorough description of their thermal properties, ability to self-assembly, the formation of stable superstructures was studied in detail. It was found that examined (co)polymers did not show any heterogeneities and phase separation, while their variation of glass transition temperature (Tg) was strictly related to the change in the number of glycomonomer. Also, the stability and shapes of formed superstructures strictly depend on their composition and topology. Finally, we have shown that synthesized carbohydrate-based polymers revealed high antiproliferative activity against several cancer cell lines (i.e., breast, colon, glioma, and lung cancer). The cytotoxic activity was particularly observed for star-shaped polymers that were systematically enhanced with the growing concentration of amine moieties and molecular weight. The results presented herein suggest that synthesized star-shaped glyco(co)polymers are promising as drug or gene carriers in anticancer therapies or anti-tumor agents, depending on their cytotoxicity. Graphical abstract

Proper adsorptive confinement for efficient production of cyclic polymers: a dissipative particle dynamics study

2020 ◽  
Vol 22 (33) ◽  
pp. 18703-18710
Author(s):  
Kuo Zhang ◽  
Duo Xu ◽  
Li Zhao ◽  
Zhong-Yuan Lu
Keyword(s):  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
Efficient Production ◽  
Linear Polymers ◽  
Cyclic Polymers ◽  
Rapid Production

The cyclization of linear polymers in a porous template is a better choice for the rapid production of cyclic polymers with higher purity.

scholarly journals Investigation of the influence of impurities on the ring-opening polymerisation of L-Lactide from biogenous feedstock

2020 ◽  
Vol 27 (12) ◽  
Author(s):  
Regina Itzinger ◽  
Clemens Schwarzinger ◽  
Christian Paulik
Keyword(s):  
Mass Spectra ◽  
Structural Changes ◽  
Maldi Mass Spectrometry ◽  
Linear Polymers ◽  
Cyclic Polymers ◽  
Global Properties ◽  
Molecular Masses ◽  
Effect Of Impurities ◽  
Influence Of Impurities ◽  
Temperature Melting

AbstractIn order to use a L-lactide monomer that is derived from fermentation processes it is necessary to understand, how the polymerisation process is influenced by impurities which derive from the production process. We have selected a group of likely contaminants and added them at various concentrations to the polymerisation of L-lactide using tin (II)-2-ethylhexanoate as catalyst and 2-methoxyethanol as initiator. The effect of impurities onto the global properties of the polymers such as glass transition temperature, melting point and molecular mass distribution were investigated and NMR and MALDI mass spectrometry were used to identify structural changes within the polymers. Thus, it could be shown that in reference experiments cyclic polymers and linear polymers with different starting groups are formed. Addition of ethanol and sodium carbonate showed the strongest influence on molecular masses as well as polymer structures, which could be elucidated by interpretation of the MALDI mass spectra and NMR data.

scholarly journals Linked topological colloids in a nematic host

2015 ◽  
Vol 112 (15) ◽  
pp. 4546-4551 ◽  
Author(s):  
Angel Martinez ◽  
Leonardo Hermosillo ◽  
Mykola Tasinkevych ◽  
Ivan I. Smalyukh
Keyword(s):  
Boundary Conditions ◽  
Self Assembly ◽  
Structural Organization ◽  
Building Blocks ◽  
Elastic Coupling ◽  
Defect Structures ◽  
Two Photon ◽  
Colloidal Properties ◽  
And Topology ◽  
Orientational Ordering

Geometric shape and topology of constituent particles can alter many colloidal properties such as Brownian motion, self-assembly, and phase behavior. Thus far, only single-component building blocks of colloids with connected surfaces have been studied, although topological colloids, with constituent particles shaped as freestanding knots and handlebodies of different genus, have been recently introduced. Here we develop a topological class of colloids shaped as multicomponent links. Using two-photon photopolymerization, we fabricate colloidal microparticle analogs of the classic examples of links studied in the field of topology, the Hopf and Solomon links, which we disperse in nematic fluids that possess orientational ordering of anisotropic rod-like molecules. The surfaces of these particles are treated to impose tangential or perpendicular boundary conditions for the alignment of liquid crystal molecules, so that they generate a host of topologically nontrivial field and defect structures in the dispersing nematic medium, resulting in an elastic coupling between the linked constituents. The interplay between the topologies of surfaces of linked colloids and the molecular alignment field of the nematic host reveals that linking of particle rings with perpendicular boundary conditions is commonly accompanied by linking of closed singular defect loops, laying the foundations for fabricating complex composite materials with interlinking-based structural organization.

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