Effects of the species of crosslinking reagents on the structures and properties of biodegradable poly (butanediol sebacate ‐ butanediol terephthalate) copolyester

<div> <div> <div> <p>Polymerizing monomers into periodic two-dimensional (2D) networks provides structurally precise, atomically thin macromolecular sheets linked by robust, covalent bonds. These materials exhibit desirable mechanical, optoelectrotronic, and molecular transport properties derived from their designed structure and permanent porosity. 2D covalent organic frameworks (COFs) offer broad monomer scope, but are generally isolated as polycrystalline, insoluble powders with limited processability. Here we overcome this limitation by controlling 2D COF formation using a two- step procedure. In the first step, 2D COF nanoparticle seeds are prepared with approximate diameters of 30 nm. Next, monomers are slowly added to suppress new nucleation while promoting epitaxial growth on the existing seeds to sizes of several microns. The resulting COF nanoparticles are of exceptional and unprecedented quality, isolated as single crystalline materials with micron-scale domain sizes. These findings advance the controlled synthesis of 2D layered COFs and will enable a broad exploration of synthetic 2D polymer structures and properties. </p> </div> </div> </div>

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Seeded Growth of Single-Crystal Two-Dimensional Covalent Organic Frameworks

10.26434/chemrxiv.5702437 ◽

2017 ◽

Author(s):

Austin M. Evans ◽

Lucas R. Parent ◽

Nathan C. Flanders ◽

Ryan P. Bisbey ◽

Edon Vitaku ◽

...

Keyword(s):

Molecular Transport ◽

Controlled Synthesis ◽

Two Dimensional ◽

Covalent Organic Frameworks ◽

Seeded Growth ◽

Covalent Bonds ◽

Crystalline Materials ◽

Step Procedure ◽

Structures And Properties ◽

2D Polymer

<div> <div> <div> <p>Polymerizing monomers into periodic two-dimensional (2D) networks provides structurally precise, atomically thin macromolecular sheets linked by robust, covalent bonds. These materials exhibit desirable mechanical, optoelectrotronic, and molecular transport properties derived from their designed structure and permanent porosity. 2D covalent organic frameworks (COFs) offer broad monomer scope, but are generally isolated as polycrystalline, insoluble powders with limited processability. Here we overcome this limitation by controlling 2D COF formation using a two- step procedure. In the first step, 2D COF nanoparticle seeds are prepared with approximate diameters of 30 nm. Next, monomers are slowly added to suppress new nucleation while promoting epitaxial growth on the existing seeds to sizes of several microns. The resulting COF nanoparticles are of exceptional and unprecedented quality, isolated as single crystalline materials with micron-scale domain sizes. These findings advance the controlled synthesis of 2D layered COFs and will enable a broad exploration of synthetic 2D polymer structures and properties. </p> </div> </div> </div>

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Physicomechanical properties of biodegradable poly(D,L‐lactide) and poly(D,L‐lactide‐co‐glycolide) films in the dry and wet states

Journal of Pharmaceutical Sciences ◽

10.1002/1520-6017(200012)89:12<1558::aid-jps6>3.3.co;2-# ◽

2000 ◽

Vol 89 (12) ◽

pp. 1558-1566 ◽

Cited By ~ 1

Author(s):

H. Kranz ◽

N. Ubrich ◽

P. Maincent ◽

R. Bodmeier

Keyword(s):

Physicomechanical Properties ◽

Biodegradable Poly

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Synthesis of Grafted Biodegradable Poly(ε-caprolactone) as Antibacterial and Antifungal Agent

Polymer Science Series B ◽

10.1134/s1560090420060019 ◽

2020 ◽

Vol 62 (6) ◽

pp. 697-705

Author(s):

Sarra Benguella ◽

Aicha Hachemaoui ◽

Ahmed Yahiaoui ◽

Abdelkader Dehbi

Keyword(s):

Antifungal Agent ◽

Biodegradable Poly ◽

Antibacterial And Antifungal

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Structures and Properties of Rubberlike Networks

10.1093/oso/9780195082371.001.0001 ◽

1997 ◽

Cited By ~ 6

Author(s):

Burak Erman ◽

James E. Mark

Keyword(s):

Subject Matter ◽

Rubber Elasticity ◽

Polymer Science ◽

Strong Emphasis ◽

Present Book ◽

Structures And Properties

Rubber elasticity is an important sub-field of polymer science. This book is in many ways a sequel to the authors' previous, more introductory book, Rubberlike Elasticity: A Molecular Primer (Wiley-Interscience, 1988), and will in some respects replace the now classic book by L.R.G. Treloar, The Physics of Rubber Elasticity (Oxford, 1975). The present book has much in common with its predecessor, in particular its strong emphasis on molecular concepts and theories. Similarly, only equilibrium properties are covered in any detail. Though this book treats much of the same subject matter, it is a more comprehensive, more up-to-date, and somewhat more sophisticated treatment.

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