scholarly journals The Mechanism of the Helix-Sense Inversion of Polyaspartates as Revealed by the Study of Model Block Copolymers

2002 ◽  
Vol 34 (6) ◽  
pp. 450-454 ◽  
Author(s):  
Akinobu Ushiyama ◽  
Hidemine Furuya ◽  
Akihiro Abe ◽  
Toshimasa Yamazaki
Keyword(s):  
Block Copolymers ◽  
Model Block

The synthesis of model block copolymers of Poly(cis-1,4-isoprene : styrene)

1968 ◽  
Vol 21 (7) ◽  
pp. 1835 ◽  
Author(s):  
DN Cramond ◽  
JR Urwin
Keyword(s):  
Block Copolymers ◽  
Molecular Size ◽  
Model Block

The synthesis of model block copolymers of poly(cis-1,4-isoprene : styrene)initiated by butyllithium in the solvent benzene is described in detail, and the analysis of the microstructure of the polyisoprene sequence discussed. The copolymers were found to be of narrow distribution in molecular size and composition and the microstructure was close to that expected from previously published results on the synthesis of polyisoprenes.

Model block copolymers with complex architecture

1998 ◽  
Vol 132 (1) ◽  
pp. 207-220 ◽  
Author(s):  
Nikos Hadjichristidis ◽  
Yiannis Poulos ◽  
Apostolus Avgeropoulos
Keyword(s):  
Block Copolymers ◽  
Model Block ◽  
Complex Architecture

Self-Assembly of Hydrogels From Elastin-Mimetic Block Copolymers

2002 ◽  
Vol 724 ◽  
Author(s):  
Elizabeth R. Wright ◽  
R. Andrew McMillan ◽  
Alan Cooper ◽  
Robert P. Apkarian ◽  
Vincent P. Conticello
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Variable Temperature ◽  
Inverse Temperature ◽  
Temperature Transition ◽  
Scanning Calorimetry ◽  
Design Synthesis ◽  
Inverse Temperature Transition ◽  
Functional Biomaterials

AbstractTriblock copolymers have traditionally been synthesized with conventional organic components. However, triblock copolymers could be synthesized by the incorporation of two incompatible protein-based polymers. The polypeptides would differ in their hydrophobicity and confer unique physiochemical properties to the resultant materials. One protein-based polymer, based on a sequence of native elastin, that has been utilized in the synthesis of biomaterials is poly (Valine-Proline-Glycine-ValineGlycine) or poly(VPGVG) [1]. This polypeptide has been shown to have an inverse temperature transition that can be adjusted by non-conservative amino acid substitutions in the fourth position [2]. By combining polypeptide blocks with different inverse temperature transition values due to hydrophobicity differences, we expect to produce amphiphilic polypeptides capable of self-assembly into hydrogels. Our research examines the design, synthesis and characterization of elastin-mimetic block copolymers as functional biomaterials. The methods that are used for the characterization include variable temperature 1D and 2D High-Resolution-NMR, cryo-High Resolutions Scanning Electron Microscopy and Differential Scanning Calorimetry.

Use of Nonionic Block Copolymers in Vaccines and Therapeutics

1998 ◽  
Vol 15 (2) ◽  
pp. 89-142 ◽  
Author(s):  
Mark J. Newman ◽  
Jeffrey K. Actor ◽  
Mannersamy Balusubramanian ◽  
Chinnaswamy Jagannath
Keyword(s):  
Block Copolymers

Mechanical and Structural Consequences of Associative Dynamic Cross-Linking in Acrylic Diblock Copolymers

2019 ◽  
Author(s):  
Jacob Ishibashi ◽  
Yan Fang ◽  
Julia Kalow
Keyword(s):  
Block Copolymers ◽  
Rheological Properties ◽  
Diblock Copolymers ◽  
Cross Linking ◽  
Statistical Copolymer

<p>Block copolymers are used to construct covalent adaptable networks that employ associative exchange chemistry (vitrimers). The resulting vitrimers display markedly different nanostructural, thermal and rheological properties relative to those of their statistical copolymer-derived counterparts. This study demonstrates that prepolymer sequence is a versatile strategy to modify the properties of vitrimers.</p>

Photophysical properties of semiconducting-ferroelectric block copolymers for organic photovoltaics

2018 ◽  
Author(s):  
Mustapha Abdu-Aguye ◽  
Nutifafa Doumon ◽  
Ivan Terzic ◽  
Vincent Voet ◽  
Katya Loos ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Organic Photovoltaics ◽  
Photophysical Properties
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