نتایج جستجو برای: polymerisation
تعداد نتایج: 1578 فیلتر نتایج به سال:
This article is the first report of RAFT polymerisation trifluoroethylene (TrFE).
This paper describes both well-established routes and recent advances in the end group modification of polymers synthesised by reversible addition–fragmentation chain transfer (RAFT) polymerisation. The lability of the thiocarbonylthio group, which facilitates the RAFT mechanism, allows for ready postpolymerisation functionalisation of RAFT polymers by a number of techniques. In particular, end...
The results of the analysis of blood and urine samples for styrene and its metabolites in 491 workers in a styrene polymerisation plant in the United States are reported. The levels of exposure to styrene were estimated to be less than 10 ppm, but nevertheless styrene and metabolites were detectable in more than 50% of workers in polymerisation jobs, within 4 h of exposure. Workers involved in ...
Earlier works had demonstrated that microemulsion polymerisation is a well suited technique to produce nanostructured membranes if surfmers (polymerisable surfactants) are used to stabilise the primary template (sponge phase microemulsion). Up to now, however, same hadn’t been done using common surfactants. Present work aims to show this is possible if proper surfactants are selected. Specific ...
Enzymatic and carbene catalysed ring opening polymerisation can be combined in a one-pot reaction for the metal-free synthesis of degradable block copolymers.
Excellent control in the synthesis of MEH-PPV can be achieved by microwave assisted, ring-opening metathesis polymerisation (ROMP) of [2.2]paracyclophanedienes.
Kinetic information on the polymerisation of furfuryl alcohol catalysed by Clark-Lubs' aqueous buffer in the pH range of 1.G2.2 has been derived from the rate of increase ofcolour intensity measured with a photoelectric colorimeter. The polymerisation reaction is found to be of zero order, with the activation energy increasing exponentially with pH. The time required to reach the extent of reac...
The ring-opening polymerisation of ?-amino acid N-carboxyanhydrides (NCAs) offers a simple and scalable route to polypeptides with predicted narrow molecular weight distributions. Here we show how polyoxometalates (POMs)—redox-active metal-oxide anions—can serve as inorganic scaffold initiators for such NCA polymerisations. This “On-POM polymerisation” strategy serves an innovative platform des...
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