The 1st picture shows the molecular structures of a diblock copolymersystem at two different levels of water content. The 2nd pictureillustrates conformational changes in a Langmuir monolayer of therotaxane molecules. The 3rd picture shows film structure at varyingsurface concentrations (top) and film thicknesses (bottom).
The 1st picture/paper are for a model they've developed of adendrion diblock copolymer consisting of a dendritic polymer with ahydrophobic backbone. Such materials have interesting nanoscalestructural and phase behavior.
Revisiting Thiol-yne Chemistry: Selective and Efficient Monoaddition for Block and Graft Copolymer Formation
Johannes K. Sprafke, Jason M. Spruell, Kaila M. Mattson, Damien Montarnal, Alaina J. McGrath, Robert Pötzsch, Daigo Miyajima, Jerry Hu, Allegra A. Latimer, Brigitte I. Voit, Takuzo Aida, and Craig J. Hawker
Amongst numerous nanomaterials used in nanoparticulate drug delivery applications ( Sahoo and Labhasetwar, 2003 ), self-assembled block copolymers combine both exceptional biocompatibility and responsiveness to bioenvironmental factors, such as pH ( Letchford and Burt, 2007 ).
The morphology of the diblock copolymer depends upon the solvent used for film casting and annealing results in morphological changes for both films deposited from chloroform and trichlorobenzene.">
E.; Matyjaszewski, K., Well-Defined (Co)polymers with 5-Vinyltetrazole Units via Combination of Atom Transfer Radical (Co)polymerization of Acrylonitrile and "Click Chemistry"-Type Postpolymerization Modification.
Synthesis of Functionalized NMP Initiators for Click Chemistry: a Versatile Method for the Preparation of Functionalized Polymers and Block Copolymers.
They use a versatile method, largely inspired by chemical "radicalpolymerization", to generate configurations of coarse-grained modelsfor polymer melts. The two figures show snapshots of lamellardiblocks and triblocks. Equilibrium lamellar spacing depends on theincompatibility between the two (or three) polymers forming the blockcopolymer.
Studies with ABA Triblock Copolyethers Carrying Guanidinium Ion Pendants
Shingo Tamesue, Masataka Ohtani, Kuniyo Yamada, Yasuhiro Ishida, Jason M. Spruell, Nathaniel A. Lynd,
The morphology of the diblock copolymer depends upon the solvent used for film casting and annealing results in morphological changes for both films deposited from chloroform and trichlorobenzene.
The poly(L-alanine)-b-poly(hydroxyethyl glutamine)(PLA-b-PHEGA) diblock copolypeptide was obtained by reacting the PLA-b-PBLG diblock copolypeptide with ethanolamine to improve the hydrophilicity of PBLG block.
Poly(L-alanine)-block-poly(γ-benzyl-glutamate)(PLA-b-PBLG) AB diblock copolypeptide was synthesized by ring opening polymerization of Ala-NCA and GluB-NCA, with triethylamine as the initiator.
Synthesis of Amphiphilic Diblock Copolymer Poly(10-hydroxydecanoic acid)/poly(glycidyl methacrylate) by Combining Enzymatic Condensation Polymerization and ATRP[J].
Subsequently one end of PHDA chains was modified by reaction with α-bromopropionyl bromide and the other was protected by chlorotrimethylsilane(TMSCL), respectively, the resulting monofunctional macroinitiator was used in the ATRP of GMA using CuCl/2,2'-bipyridine(bpy) as the catalyst system to afford the diblock copolymers including biodegradable PHDA blocks and well-defined PGMA blocks.
The block copolymer undergoes a two-step thermo-induced self-assembly, which results in the formation of multilamellar vesicles after the first LCST temperature and to unilamellar vesicles above the second LCST transition.