scholarly journals Synthesis and Properties of Multi-Block Copolymers Based on Poly(oxyethylene)s and Aromatic Polyamides

1984 ◽  
Vol 16 (3) ◽  
pp. 267-272 ◽  
Author(s):  
Yoshio Imai ◽  
Mikio Kajiyama ◽  
Shin-ichi Ogata ◽  
Masa-aki Kakimoto
Keyword(s):  
Block Copolymers ◽  
Aromatic Polyamides

scholarly journals Synthesis and Properties of Multi-Block Copolymers Based on Polybutadiene and Aromatic Polyamides Having Unsymmetrical Structures

1985 ◽  
Vol 17 (8) ◽  
pp. 935-941 ◽  
Author(s):  
Shin-ichi Ogata ◽  
Hiroyuki Maeda ◽  
Masa-aki Kakimoto ◽  
Yoshio Imai
Keyword(s):  
Block Copolymers ◽  
Aromatic Polyamides

scholarly journals Synthesis and Properties of Block Copolymers Based on Amine-Terminated Polydimethylsiloxane and Aromatic Polyamides

1986 ◽  
Vol 18 (10) ◽  
pp. 735-740 ◽  
Author(s):  
Mikio Kajiyama ◽  
Yasunari Nishikata ◽  
Masa-aki Kakimoto ◽  
Yoshio Imai
Keyword(s):  
Block Copolymers ◽  
Aromatic Polyamides

scholarly journals Synthesis and Properties of Block Copolymers Based on Carboxyl-Terminated Polydimethylsiloxane and Aromatic Polyamides

1986 ◽  
Vol 18 (12) ◽  
pp. 935-940 ◽  
Author(s):  
Masa-aki Kakimoto ◽  
Mikio Kajiyama ◽  
Yoshio Imai
Keyword(s):  
Block Copolymers ◽  
Aromatic Polyamides

Electron Microscopic Observation of the Longitudinal Organization of Poly (p-Phenylene Terephthalamide) Fibers

1982 ◽  
Vol 40 ◽  
pp. 680-681
Author(s):  
Li Li-Sheng ◽  
L.F. Allard ◽  
W.C. Bigelow
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Microscopic Observation ◽  
Electron Microscopic Observation ◽  
Electron Microscopic ◽  
Aromatic Polyamides ◽  
Radial Arrangement ◽  
Scanning Electron ◽  
Better Than

The aromatic polyamides form a class of fibers having mechanical properties which are much better than those of aliphatic polyamides. Currently, the accepted morphology of these fibers as proposed by M.G. Dobb, et al. is a radial arrangement of pleated sheets, with the plane of the pleats parallel to the axis of the fiber. We have recently obtained evidence which supports a different morphology of this type of fiber, using ultramicrotomy and ion-thinning techniques to prepare specimens for transmission and scanning electron microscopy.

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
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