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Highly branched poly(L-lysine)

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Star-shaped fluorescent polypeptides

Harm-Anton Klok

Two series of novel, four-arm, star-shaped polypeptides were prepared via the ring-opening polymerization of γ-benzyl-L-glutamate N-carboxyanhydride and ε-benzyloxycarbonyl-L-lysine N-carboxyanhydride with a tetra-amino-substituted perylene fluorophore as ...

2001

Time-temperature-transformation diagram for reactive processing of polyamide 12

Pierre-Etienne Bourban

In order to describe the different events occurring during the anionic polymerization of polyamide 12 (PA12), a general concept of a time, temperature, and transformation (TTT) diagram was established and related to reactive processing conditions. Polymeri ...

2001

Self-assembly of peptide-based diblock oligomers

Harm-Anton Klok

The synthesis and supramolecular organization of a novel class of rod-coil type diblock oligomers will be discussed. The diblock oligomers consist of a rodlike α-helical oligopeptide segment that is conjugated to an oligo(styrene) coil. In comparison with ...

2000

New Regeneration process of heavy metals loaded chelating resin

Albert Renken

An alternative to the classical acid-base regeneration of chelating resins loaded with heavy metals is investigated. The new process consists in recovering the heavy metals with recyclable soluble complexing agents. The semiclosed reactor includes a fixed ...

2000

Controlled polymerization of hexa-n-alkylcyclotrisiloxanes with long alkyl groups

Harm-Anton Klok

Hexa-n-alkylcyclotrisiloxanes with side chains ranging from butyl up to decyl were polymerized anionically with cryptated lithium as the counterion. The polymerizations usually yielded polymers with low polydispersity, demonstrating the presence of a singl ...

1997

Stabilization of colloidal palladium particles by a block copolymer of polystyrene and a block containing amide sidegroups

Harm-Anton Klok

A block copolymer of polystyrene and poly(tert-butylmethacrylate) was prepared by anionic polymerization. The ester groups of the poly(tert-butylmethacrylate) were hydrolyzed, after which the remaining carboxyl groups were reacted with pyrrolidine. The res ...

1996