Polymer coatings, thickness

Adhesion of polymer coatings (thickness 60-70 fik) formed on the glass surface is obtained by lattice notch" method. 

What will the resulting polymer coat thickness be, assuming that the solid density is 0.95 g/cc ... 

If the melt viscosity is considered as a function of temperature, then the momentum and energy equations will have to be solved simultaneously. Nevertheless, the results concerning the temperature increase of the melt layers near the wall will be only slightly different from that just given. The resulting polymer coat thickness can be calculated by equating the volumetric flow rates inside and outside the die, namely ... 

Solving for h, the polymer melt-coating thickness, we obtain h — 0.45 mm. Thus, taking into account the density increase upon solidification, the solid polymer coat thickness is hs — 0.37 mm. 

Figure 34.19 Variation of (a) oxygen enrichment factors and (b) air flux constants as a function of plasma polymer coating thickness, perfluro-1-methyldecalin plasma polymer coatings deposited onto porous polysulfone hollow fibers at A 5.35 x 10 J/kg 6.64 X 10 J/kg and 8.05 x 10 J/kg.

Mishima K, Matsuyama K, Furukawa A, Fuji T, Shida J, Nojiri N, Kubo H, Katada N. Control of polymer coating thickness of microcapsules containing inorganic microparticles using cosolvency of supercritical carbon dioxide. Ka-gaku Kogaku Ronbunshu 2001 27 700-706. 

Figure 8. Polyisobutylcne coated 200 MHz SAW resonator responses at 25 C to water vapor at 12388mg/m3, for different polymer coating thicknesses ranging from 0 - 2S0KHz (0 - 529 A), for a plasma cleaned device manufactured without the protective overlay of silica. The vapor is on at "a" and off at b .

Nutrients are released from POLYON-coated fertilizers by osmotic diffusion. The RLC process permits appHcation of ultrathin, hence lower cost, membrane coatings which distinguishes this technology from many other polymer-coated fertilizers. The coating thickness determines the diffusion rate and the duration of release. POLYON-coated urea at a 4% coating (44% N) will release at twice the rate and will have half the duration as an 8% coating... 

If the rf source is applied to the analysis of conducting bulk samples its figures of merit are very similar to those of the dc source [4.208]. This is also shown by comparative depth-profile analyses of commercial coatings an steel [4.209, 4.210]. The capability of the rf source is, however, unsurpassed in the analysis of poorly or nonconducting materials, e.g. anodic alumina films [4.211], chemical vapor deposition (CVD)-coated tool steels [4.212], composite materials such as ceramic coated steel [4.213], coated glass surfaces [4.214], and polymer coatings [4.209, 4.215, 4.216]. These coatings are used for automotive body parts and consist of a number of distinct polymer layers on a metallic substrate. The total thickness of the paint layers is typically more than 100 pm. An example of a quantitative depth profile on prepainted metal-coated steel is shown as in Fig. 4.39. 

Encouraged by the X-ray and contact angle results, we performed some preliminary gas-permeation measurements. Here, a self-supporting film is required and only the longer block copolymers were used. Fluoro-PSB-II and Fluoro-triblock were coated on porous Celgard 2400 membranes the measurements were taken at room temperature at a driving pressure of 5 bars. Since no absolute polymer layer thickness has been determined, only relative values of the permeability are given (Table 10.6). In the case of the separation of C02 from... 

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