Assessing the moisture barrier properties of polymeric coatings using electrical and electrochemical methods

1989 ◽  
Vol 24 (5) ◽  
pp. 787-806 ◽  
Author(s):  
S.R. Taylor
Keyword(s):  
Barrier Properties ◽  
Electrochemical Methods ◽  
Polymeric Coatings ◽  
Moisture Barrier

Adhesion and Electrical Insulation of Thin Polymeric Coatings Under Saline Exposure

1987 ◽  
Vol 110 ◽  
Author(s):  
R. N. Leyden ◽  
D. I. Basiulis
Keyword(s):  
Barrier Properties ◽  
Peel Strength ◽  
Polymer Coatings ◽  
Polymeric Coatings ◽  
Adhesive Failure ◽  
Short Term ◽  
Leakage Currents ◽  
Electrical Bias ◽  
Implanted Devices

AbstractA study was made of the adhesion of insulating polymer coatings under long term exposure to electrical bias. Since a common mode of failure in implanted devices is the penetration of water into poorly adhering insulation/conductor interfaces followed by electrolytic degradation, development of processes, primers, and insulators with good adhesion that resist the effects of water were sought. Polyimide coatings were tested for their ion barrier properties by immersion of insulated comb patterns in saline with 9 V D.C. bias between the comb fingers. Leakage currents, measured over three years exposure, increased from several picoamps initially to several nanoamps in surviving specimens. Subsequent studies showed that dramatic improvements in the moisture durability of the adhesion could be obtained using Hitachi's aluminum chelate type primer. Whereas the peel strength of polyimide on unprimed platinum fell more than 90% after several hours of boiling saline exposure, the peel strength of polyimide coatings on primed surfaces remained at over 80% of their initial values. ESCA analysis of the peel interfaces showed that both aluminum oxide and polyimide remain on the substrate after peeling back the polyimide. This suggests a combination of cohesive and adhesive failure at the primer/polyimide interface. The effects of exposure of the polymer/substrate interfaces (edges) to saline and electrochemical stress were examined by patterning circular openings in the polyimide. A 10 V anodic potential was found to damage adhesion to titanium as far as 75 microns away from the edge. Pulsing at 500 Hz, 1 V peak to peak was found to have no measurable effect in the short term.

Moisture barrier properties and morphology of mesquite gum–candelilla wax based edible emulsion coatings

2003 ◽  
Vol 36 (9-10) ◽  
pp. 885-893 ◽  
Author(s):  
E. Bosquez-Molina ◽  
I. Guerrero-Legarreta ◽  
E.J. Vernon-Carter
Keyword(s):  
Barrier Properties ◽  
Moisture Barrier ◽  
Mesquite Gum ◽  
Candelilla Wax

scholarly journals Moisture barrier properties of thin organic-inorganic multilayers prepared by plasma-enhanced ALD and CVD in one reactor

2014 ◽  
Vol 9 (1) ◽  
pp. 223 ◽  
Author(s):  
Tim Bülow ◽  
Hassan Gargouri ◽  
Mirko Siebert ◽  
Rolf Rudolph ◽  
Hans-Hermann Johannes ◽  
...  
Keyword(s):  
Barrier Properties ◽  
Moisture Barrier

Moisture-Barrier Properties of Carbon-coated Silicon Oxide Films

2006 ◽  
Author(s):  
Wen-Ray Chen ◽  
Hsiung-Ming Guo ◽  
Teen-Hang Meen ◽  
Kuen-Hsien Wu ◽  
Fuh-Shyang Juang ◽  
...  
Keyword(s):  
Silicon Oxide ◽  
Oxide Films ◽  
Barrier Properties ◽  
Moisture Barrier ◽  
Carbon Coated

Moisture Barrier Properties of Single-Layer Graphene Deposited on Cu Films for Cu Metallization

2017 ◽  
Author(s):  
P. Gomasang ◽  
T. Abe ◽  
K. Kawahara ◽  
Y. Wasai ◽  
N. Nabatova-Gabain ◽  
...  
Keyword(s):  
Single Layer ◽  
Barrier Properties ◽  
Single Layer Graphene ◽  
Moisture Barrier ◽  
Cu Films ◽  
Cu Metallization ◽  
Layer Graphene

Interface effects on the moisture barrier properties of SiNx/PMMA/SiNx hybrid structure

2014 ◽  
Vol 254 ◽  
pp. 429-432 ◽  
Author(s):  
Subimal Majee ◽  
Bernard Geffroy ◽  
Yvan Bonnassieux ◽  
Jean-Eric Bourée
Keyword(s):  
Barrier Properties ◽  
Hybrid Structure ◽  
Moisture Barrier ◽  
Interface Effects

Preparation of PET/PT Composite Film and Study of its Moisture Barrier Properties

2012 ◽  
Vol 608-609 ◽  
pp. 1351-1353
Author(s):  
Wen Ming Ren ◽  
Pei Fang Cheng ◽  
Xue Feng Liu
Keyword(s):  
Water Vapor ◽  
Composite Film ◽  
Transmission Rate ◽  
Composite Films ◽  
Barrier Properties ◽  
Water Vapor Transmission Rate ◽  
Moisture Barrier ◽  
Vapor Permeation ◽  
Water Vapor Transmission ◽  
Influence Of Temperature On

In order to improve the practical performance of common Cellophane as packaging material, PET/PT composite film were prepared by means of Dry Lamination, and the influence of temperature on water vapor permeation of composite films was investigated at the range of 20-50°C at 50% relative humidity. The results showed that the moisture barrier properties of common Cellophane were improved obviously by means of coating on the PET films and the water vapor transmission rate of composite films was increased with temperature increasing in the range from 20°C to 50°C，the relationship between water vapor transmission rate of the composite films and the temperature followed an exponential grow curve [y=1.3441exp (0.0597x)], correlation coefficient R is 0.9957.

scholarly journals Design rules for the preparation of low-cost hole transporting materials for perovskite solar cells with moisture barrier properties

2017 ◽  
Vol 5 (48) ◽  
pp. 25200-25210 ◽  
Author(s):  
Michiel L. Petrus ◽  
Arif Music ◽  
Anna C. Closs ◽  
Johan C. Bijleveld ◽  
Maximilian T. Sirtl ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Barrier Properties ◽  
Design Rules ◽  
Moisture Barrier ◽  
Hole Transporting ◽  
Hole Transporting Materials

A series of azomethine-based HTMs is synthesized using simple condensation chemistry. Their photovoltaic performance and moisture barrier properties are presented.

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