An experimental study of an annular jet of small width issuing into stagnant surroundings has been reported. The measured quantities include mean velocity and turbulence intensities. The measurements have been carried out in the intermediate and fully merged zones. A constant temperature hot wire was used with X probe sensors. The results show that the annular jet develops faster than a single jet. The mean velocity profiles are similar and agree well with those for a single jet at a distance 3.24 times the outer
diameter, downstream from the nozzle. The turbulence intensity profiles are similar at further greater distances and do not agree with the single jet.
The results of calorimetric studies of synthesized oligosiloxane glycols (OSG) of different MW are discussed, as well as the data obtained for linear polyurethanes prepared from the OSG. Along with MW MT0557 Oakley Commit Light Yellow Red Lens Black Frame
an important parameter determining the glass transition temperature, the crystallizability, crystallization temperature, and so on is the number of OH endgroups in the OSG, whose self-association tendency reduces the chain mobility of. The influence of OSG blocks on the properties of polyurethanes based on OSGs increases with increasing MW of the polymers, and with increasing weight fractions in the Oakley Commit Black Frame Yellow Red Lens CM001