scholarly journals Poly(ethylene oxide)-based block copolymers with very high molecular weights for biomimetic calcium phosphate mineralization

RSC Advances ◽  
2015 ◽  
Vol 5 (125) ◽  
pp. 103494-103505 ◽  
Author(s):  
Tobias Mai ◽  
Susanne Boye ◽  
Jiayin Yuan ◽  
Antje Völkel ◽  
Marlies Gräwert ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Block Copolymers ◽  
Ethylene Oxide ◽  
Biologically Inspired ◽  
Molecular Weights ◽  
Excellent Growth ◽  
Phosphate Mineralization ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Very High

Ampholytic and betaine-type block copolymers are excellent growth modifiers for calcium phosphate in biologically inspired calcium phosphate mineralization.

Poly(ethylene oxide)-b-poly(3-sulfopropyl methacrylate) Block Copolymers for Calcium Phosphate Mineralization and Biofilm Inhibition

2014 ◽  
Vol 15 (11) ◽  
pp. 3901-3914 ◽  
Author(s):  
Tobias Mai ◽  
Ekaterina Rakhmatullina ◽  
Katrin Bleek ◽  
Susanne Boye ◽  
Jiayin Yuan ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Block Copolymers ◽  
Ethylene Oxide ◽  
Biofilm Inhibition ◽  
Phosphate Mineralization ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Modification of Montmorillonite with PEO-b-PS Copolymers

2000 ◽  
Vol 628 ◽  
Author(s):  
Frederick L. Beyer ◽  
Nora C. Beck Tan
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Block Length ◽  
X Ray Diffraction ◽  
X Ray ◽  
Volume Fractions ◽  
Melt Intercalation ◽  
Molecular Weights ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

ABSTRACTWyoming montmorillonite has been modified with block copolymers of poly (styrene) (PS) and poly(ethylene oxide) (PEO). Using melt intercalation techniques, PEO-b-PS copolymers spanning a range of volume fractions and molecular weights were mixed with montmorillonite, annealed above the Tg of PS, and characterized using X-ray diffraction. Most of the block copolymers intercalated the clay, with several samples exhibiting multiple Bragg reflections from increased gallery spacing. Samples with higher PEO volume fractions were most likely to have intercalation. For a given PS block length, longer PEO blocks were more likely to produce intercalation. In general, the increased gallery spacings were close to those produced by modifying montmorillonite with PEO homopolymer.

scholarly journals Fibrous Materials Made of Poly(ε-caprolactone)/Poly(ethylene oxide)-b-Poly(ε-caprolactone) Blends Support Neural Stem Cells Differentiation

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1621 ◽  
Author(s):  
Daniel Fernández ◽  
Montserrat Guerra ◽  
Judit G. Lisoni ◽  
Thomas Hoffmann ◽  
Rodrigo Araya-Hermosilla ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Young Modulus ◽  
Fibrous Materials ◽  
Fiber Mats ◽  
Molecular Weights ◽  
Neural Stem Progenitor Cells ◽  
Hydrophilic Character ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

In this work, we design and produce micron-sized fiber mats by blending poly(ε-caprolactone) (PCL) with small amounts of block copolymers poly(ethylene oxide)m-block-poly(ε-caprolactone)n (PEOm-b-PCLn) using electrospinning. Three different PEOm-b-PCLn block copolymers, with different molecular weights of PEO and PCL, were synthesized by ring opening polymerization of ε-caprolactone using PEO as initiator and stannous octoate as catalyst. The polymer blends were prepared by homogenous solvent mixing using dichloromethane for further electrospinning procedures. After electrospinning, it was found that the addition to PCL of the different block copolymers produced micron-fibers with smaller width, equal or higher hydrophilicity, lower Young modulus, and rougher surfaces, as compared with micron-fibers obtained only with PCL. Neural stem progenitor cells (NSPC), isolated from rat brains and grown as neurospheres, were cultured on the fibrous materials. Immunofluorescence assays showed that the NSPC are able to survive and even differentiate into astrocytes and neurons on the synthetic fibrous materials without any growth factor and using the fibers as guidance. Disassembling of the cells from the NSPC and acquisition of cell specific molecular markers and morphology progressed faster in the presence of the block copolymers, which suggests the role of the hydrophilic character and porous topology of the fiber mats.

Cleavage of polystyrene-b -poly(ethylene oxide) block copolymers with a trithiocarbonate linkage in solutions

2010 ◽  
Vol 48 (17) ◽  
pp. 3834-3840 ◽  
Author(s):  
Min Cao ◽  
Jian-Qi Wang ◽  
Peng-Cheng Chen ◽  
Jun-Ting Xu ◽  
Zhi-Qiang Fan
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Synthesis and properties of semifluorinated block copolymers containing poly(ethylene oxide) and poly(fluorooctyl methacrylates) via atom transfer radical polymerisation

Polymer ◽  
2002 ◽  
Vol 43 (25) ◽  
pp. 7043-7049 ◽  
Author(s):  
Kwon Taek Lim ◽  
Min Young Lee ◽  
Myung Jun Moon ◽  
Gun Dae Lee ◽  
Seong-Soo Hong ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Atom Transfer ◽  
Radical Polymerisation ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Synthesis and self-association in aqueous media of poly(ethylene oxide)/poly(ethyl glycidyl carbamate) amphiphilic block copolymers

Polymer ◽  
2006 ◽  
Vol 47 (14) ◽  
pp. 4905-4915 ◽  
Author(s):  
Philip Dimitrov ◽  
Alicja Utrata-Wesołek ◽  
Stanislav Rangelov ◽  
Wojciech Wałach ◽  
Barbara Trzebicka ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Aqueous Media ◽  
Amphiphilic Block Copolymers ◽  
Poly Ethylene Oxide ◽  
Self Association ◽  
Poly Ethylene ◽  
Glycidyl Carbamate
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