TY - JOUR
AU - Stevens, J. R.
AB -  EXPERIMENTAL Apparatus Because of the hygroscopic nature of these monomers it is convenient to conduct the entire preparation of samples under vacuum. The vacuum apparatus comprises three parts: the vacuum system, the in-line filter apparatus shown in Figure 1,and the manifold shown in Figure 2. The vacuum system consists of a rotary pump, a mercury diffusion pump, a Pirani gauge to monitor the vacuum, and a cold trap. Except in the vacuum system no grease is used in the apparatus for valves or joints in order to avoid contamination of the monomer. Technique The manifold is first precleaned with chromic acid and rinsed with distilled water. The entire apparatus is then assembled and evacuated. To evacuate the manifold it is necessary to open valve C (Fig. 1)to bypass the millipore filter. The manifold is gently flamed with a torch while being pumped down. After the manifold has been thoroughly flamed, all three valves are closed. The flask in which the monomer is dried (see Fig. 1)is removed and filled with monomer. A small quantity of calcium hydride briquettes are slowly added to dry the monomer. When the reaction of the calcium hydride with water in the monomer has 
TI - Preparation of clean polymers for rayleigh–brillouin light scattering studies
JF - Journal of Applied Polymer Science
DO - 10.1002/app.1979.070230829
DA - 1979-04-15
UR - https://www.deepdyve.com/lp/wiley/preparation-of-clean-polymers-for-rayleigh-brillouin-light-scattering-t8JyS3Is0M
SP - 2533
EP - 2536
VL - 23
IS - 8
DP - DeepDyve
ER -