Dendrimer-Like Star-Branched Block Copolymers with Controlled Segment Sequence and their Star-Like Dendrigraft Derivatives

2014 ◽  
Vol 67 (1) ◽  
pp. 31 ◽  
Author(s):  
Chao Zhang ◽  
Junpo He
Keyword(s):  
Block Copolymers ◽  
Molecular Conformation ◽  
Coupling Reactions ◽  
Dilute Solution ◽  
Mica Substrate ◽  
Segment Sequence ◽  
Force Microscopy ◽  
Atomic Force ◽  
Star Copolymers ◽  
Grafting Reactions

Star polymers with star-like arms, namely dendrimer-like star-branched block copolymers, were synthesised by anionic polymerisation with 1,3-bis(1-phenylethenyl)benzene (MDDPE) and divinylbenzene (DVB) as the coupling agents. The segment sequence was controlled by changing the polymerisation sequences of different monomers and coupling reactions. Two types of dendrimer-like star-branched block copolymers were prepared with polyisoprene (PI) block incorporated in the interior part or on the periphery. The PI chains in the resulting star copolymers were iteratively grafted through epoxidation and grafting reactions, forming star-like dendrigraft copolymers. The molecular conformation of the products in dilute solution was analysed by static and dynamic light scattering. These products adopt large sized globular conformation in dilute solution. Atomic force microscopy shows that the star-like dendrigraft copolymers appear as collapsed spheres on mica substrate.

Atomic Force Microscopy Study of Helical Poly(phenylacetylene)s on a Mica Substrate

2003 ◽  
Vol 36 (25) ◽  
pp. 9670-9674 ◽  
Author(s):  
Shin-ichiro Sakurai ◽  
Kenji Kuroyanagi ◽  
Kazuhide Morino ◽  
Masashi Kunitake ◽  
Eiji Yashima
Keyword(s):  
Atomic Force Microscopy ◽  
Microscopy Study ◽  
Atomic Force Microscopy Study ◽  
Mica Substrate ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals Microphase separation at the surface of block copolymers, as studied with atomic force microscopy

2000 ◽  
Vol 19 (4) ◽  
pp. 381-395 ◽  
Author(s):  
A Rasmont ◽  
Ph Leclère ◽  
C Doneux ◽  
G Lambin ◽  
J.D Tong ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Block Copolymers ◽  
Microphase Separation ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals Atomic Force Microscopy Imaging of DNA Covalently Immobilized on a Functionalized Mica Substrate

1999 ◽  
Vol 77 (1) ◽  
pp. 568-576 ◽  
Author(s):  
Luda S. Shlyakhtenko ◽  
Alexander A. Gall ◽  
Jeffrey J. Weimer ◽  
David D. Hawn ◽  
Yuri L. Lyubchenko
Keyword(s):  
Atomic Force Microscopy ◽  
Mica Substrate ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
Atomic Force Microscopy Imaging

scholarly journals Bioadhesion of various proteins on random, diblock and triblock copolymer surfaces and the effect of pH conditions

2010 ◽  
Vol 8 (58) ◽  
pp. 630-640 ◽  
Author(s):  
Manuel L. B. Palacio ◽  
Scott R. Schricker ◽  
Bharat Bhushan
Keyword(s):  
Block Copolymers ◽  
Methyl Methacrylate ◽  
Protein Interactions ◽  
Electrostatic Interactions ◽  
Chemical Compositions ◽  
Poly Methyl Methacrylate ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ph Conditions ◽  
Adhesive Interactions

The adhesive interactions of block copolymers composed of poly(methyl methacrylate) (PMMA)/poly(acrylic acid) (PAA) and poly(methyl methacrylate)/poly(2-hydroxyethyl methacrylate) (PHEMA) with the proteins fibronectin, bovine serum albumin and collagen were studied by atomic force microscopy. Adhesion experiments were performed both at physiological pH and at a slightly more acidic condition (pH 6.2) to model polymer–protein interactions under inflammatory or infectious conditions. The PMMA/PAA block copolymers were found to be more sensitive to the buffer environment than PMMA/PHEMA owing to electrostatic interactions between the ionized acrylate groups and the proteins. It was found that random, diblock and triblock copolymers exhibit distinct adhesion profiles although their chemical compositions are identical. This implies that biomaterial nanomorphology can be used to control protein–polymer interactions and potentially cell adhesion.

Microstructure of block copolymers containing a conjugated segment, as studied with atomic force microscopy

1999 ◽  
Vol 102 (1-3) ◽  
pp. 1279-1282 ◽  
Author(s):  
R. Lazzaroni ◽  
Ph. Leclére ◽  
A. Couturiaux ◽  
V. Parente ◽  
B. François ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Block Copolymers ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals Tapping Mode Atomic Force Microscopy (TMAFM) of Some Multi-Component Polymers

2013 ◽  
Vol 29 ◽  
pp. 96-103
Author(s):  
Rameshwar Adhikari
Keyword(s):  
Atomic Force Microscopy ◽  
Block Copolymers ◽  
Chemical Society ◽  
Phase Imaging ◽  
Force Microscopy ◽  
Molecular Arrangement ◽  
Atomic Force ◽  
Unit Cells ◽  
Potential Applications ◽  
Nanoscale Morphology

Atomic force microscopy (AFM) has been used frequently in polymer research in particular for imaging topography and phase morphology of multi-component polymers. In this work, we demonstrate the potential applications of the AFM in the study of morphology of multi-component polymers taking examples of some technically important semicrystalline polymers, blends and nanostructured block copolymers. The morphology of semicrystalline morphology could be determined ranging from molecular arrangement in the unit cells to the lamellar structure to the macroscopic morphology showing the spherulites of the polymers. Nanoscale morphology of block copolymers, nanocomposites and blends could be easily accessed by the aping mode AFM (TMAFM) phase imaging technique. It has been demonstrated that TMAFM phase imaging can be successfully utilized as a routine tool for the investigation of nanoscale morphology of the heterogeneous polymers.DOI: http://dx.doi.org/10.3126/jncs.v29i0.9258Journal of Nepal Chemical Society Vol. 29, 2012 Page:  96-103 Uploaded date: 12/5/2013 

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