Concept

Polymer stabilizers

Publications associées (96)

Water-soluble, unimolecular containers based on amphiphilic multiarm star block copolymers

Harm-Anton Klok, John Christopher Plummer, Céline Ternat

A new class of water-soluble, amphiphilic star block copolymers with a large number of arms was prepared by sequential atom transfer radical polymerization (ATRP) of n-butyl methacrylate (BMA) and poly-(ethylene glycol) methyl ether methacrylate (PEGMA). A ...

2006

Low stress acrylated hyperbranched polymers

Lars Schmidt

The objective of this study was to investigate the behavior of highly functional acrylates, during isothermal ultraviolet (UV) curing. The materials included a pentafunctional acrylate and two acrylated hyperbranched polymers, one with a stiff polyester co ...

EPFL2006

Ionic solid-state dimers and polymers derived from imidazolium dicarboxylic acids

Paul Joseph Dyson, Zhaofu Fei, Wee Han Ang

A series of imidazolium dicarboxylic acids have been prepd. from the reaction of the 1,3-bis(carboxymethyl)imidazolium zwitterion with the Bronsted acids HX (X = F, Br, Cl, ClO4). The structures of these acids have been established in the solid ...

2006

Site-isolated porphyrin catalysts in imprinted polymers

Kay Severin, Corinne Daguenet, Estelle Burri

A meso-tetraaryl ruthenium porphyrin complex having four polymerizable vinylbenzoxy groups (2) has been synthesized by reaction of pyrrole with 4-(vinylbenzoxy)benzaldehyde and subsequent metalation with [Ru-3(CO)(12)]. The porphyrin complex was immobilize ...

2005

Continuous high-temperature polymerisation of methyl methacrylate

Thierry Meyer, Philip Nising

As the need for lower mol. wt. acrylates for specialty and molding applications increases, industry is looking for substitute prodn. processes. An alternative to the increasing of initiator and chain transfer agent concn. is working at higher temps. Howeve ...

2005

Thermal initiation of MMA in high temperature radical polymerizations

Thierry Meyer, Philip Nising

Several researches have dealt with the thermal initiation of Me methacrylate (MMA) in the past. Some of them already discussed the presence of peroxide contg. species that are formed from dissolved oxygen and the monomer itself as main reason for this init ...

2005

Colloidal processing and sintering of nanosized transition aluminas

Heinrich Hofmann, Paul Bowen, Claude Paul Carry, David Luxembourg

The dispersion of nanosized gamma aluminas with high specific surfaces areas (100 m2 /g) and primary particle sizes around 20 nm, using polyacrylic acid, has been investigated. The effect of pH and polymer concentration showed that the highest density gree ...

2005

Highly cross-linked polymers containing N,N ',N ''-chelate ligands for the Cu(II)-mediated hydrolysis of phosphoesters

Kay Severin, Alexander Schiller

Three immobilized Cu(II) complexes were generated by the following: (a) homopolymerization of the N,N',N '' chelate ligand tris[2-(1-vinylimidazolyl)]phosphine (1) and subsequent metalation with CuCl2; (b) copolymerization of 1 with ethyleneglycol dimethac ...

2005

Search for colour singlet and colour reconnection effects in hadronic Z decays at LEP

Aurelio Bay

A search is performed in symmetric 3-jet hadronic Z-decay events for evidence of colour singlet production or colour reconnection effects. Asymmetries in the angular separation of particles are found to be sensitive indicators of such effects. Upper limits ...

2004

Microfabrication d'objets composites fonctionnels en 3D et à haut facteur de forme, par procédés UV-LIGA et microstéréolithographie

Sébastien Jiguet

The present thesis deals with new composite photoresists for the UV-LIGA and microstereolithography microfabrication processes. The aim is to build functional 3D objects, with high aspect ratio. Two projects have been investigated in parallel for each micr ...

EPFL2004

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