Dielectric normal mode relaxation of tethered polyisoprene chains in styrene-isoprene block copolymers

1997 ◽  
Vol 69 (1) ◽  
pp. 125-130 ◽  
Author(s):  
Keiichiro Adachi ◽  
Tadao Kotaka
Keyword(s):  
Block Copolymers ◽  
Normal Mode

Study of subchain dynamics by dielectric normal-mode spectroscopy: butadiene-isoprene block copolymers

1991 ◽  
Vol 24 (21) ◽  
pp. 5843-5850 ◽  
Author(s):  
Keiichiro Adachi ◽  
Isao Nishi ◽  
Hisaaki Doi ◽  
Tadao Kotaka
Keyword(s):  
Block Copolymers ◽  
Normal Mode ◽  
Mode Spectroscopy

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

The Nusayris in Medieval Syria

2018 ◽  
Author(s):  
Stefan Winter
Keyword(s):  
Normal Mode ◽  
Early Development ◽  
A Priori ◽  
Medieval Period ◽  
Historical Sources

This chapter re-examines the early development of the ʻAlawi community and its situation in western Syria in the medieval period in the wider context of what might be termed Islamic provincial history. It starts from the premise that the conventional image of the “Nusayris” has largely been fashioned by elite historical sources whose discourse on nonorthodox groups is a priori negative but which, when read against the grain and compared with other sources, can yield a less essentializing, less conflicting account of the community's development. In particular, the chapter aims to show that the ʻAlawi faith was not the deviant, marginal phenomenon it has retrospectively been made out to be but, on the contrary, constituted, and was treated by the contemporary authorities as, a normal mode of rural religiosity in Syria.

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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