Isocyanates may be harmful to workers and methods for monitoring air exposure in the field are necessary. The main aim of this study was to study the field performance of a method using 1-(2-methoxyphenyl)piperazine (2MP)-impregnated filters, by side-by-side comparison of long-term sampling with consecutive short-term samplings and also by short-term comparisons with other methods. Apart from u...

While transesterification has been largely explored by chemists, only a few studies comparatively dealt with its “sluggish cousin”, transcarbamoylation. Originally suggested 70 years ago to explain the stress decay observed at high temperature in polyurethane chemical networks, transcarbamoylation?also called transurethanization or urethane exchange?is still underexploited both organic and poly...

A simple versatile route to polyrotaxanes with a variety of topologies is described through the synthesis and subsequent polymerization of readily accessible and stable rotaxane monomers containing bulky blocked isocyanate stopper groups. Link to download paper: http://onlinelibrary.wiley.com/doi/10.1002/anie.200351458/abstract

Four patients exposed to isocyanate vapour developed dyspnoea associated with restriction and reduced gas transfer as well as moderate airways obstruction on lung function testing. In one patient bilateral radiographic shadowing was present and an open lung biopsy was performed. The microscopic appearances ranged from acute inflammation to end-stage fibrosis but the centribular accentuation of ...

Varlo.s s.bstitlUmU f«T~ add~d onto starch by m~ans of ~surification or ~th~rification so that thtir ~fftct on rtllCtifJity of starch 'With isocyanatts in a nonpolar solvtnt could bt studi~d. Ma:rim.m rtacti~t, 0/ tht moJifitd starchts 'Was achitf)~d 'When tht dtgrtt of substitution (DS.) 'Was I.bo.t 0.7. C.,td .rtthl.M plastics madt from formulations containing 20 'I, of tht starch dtrl'Pl.t:v...