Moisture liquid limit methods

Mercury Determine as directed under Mercury Limit Test, Appendix IIIB, testing the Sample Preparation prepared as follows Transfer 2.0 mL of the Sample Solution into a 50-mL beaker, add 10 mL of water, 1 mL of 1 5 sulfuric acid, and 1 mL of a 1 25 solution of potassium permanganate, cover the beaker with a watch glass, boil for a few seconds, and cool. Moisture and Residue Determine by ASTM Method E 410-92, Moisture and Residue in Liquid Chlorine. ... 

Infrared. Batch or continuous operation. Electric heating or gas-fired Only for thin films. Can be used in combination with other dryers such as drum. See comments under Liquids. See comments under Liquids (only for thin layers). Only for thin layers Primarily suited to drying surface moisture. Not suited for thick layers Specially suited for drying and baking paint and enamels Useful when space is limited. Usually used in conjunction with other methods, e.g., in drying paper coatings Useful for laboratory work or in conjunction with other methods... 

Ordered polymer films made from poly benzthiazole (PBZT) and poly benzoxazole (PBO) can be used as substrates for multilayer printed circuit boards and advanced interconnects to fill the current need for high speed, high density packaging. Foster-Miller, Inc. has made thin substrates (0.002 in.) using biaxially oriented liquid crystal polymer films processed from nematic solutions. PBZT films were processed and laminated to make a substrate with dielectric constant of 2.8 at 1 MHz, and a controllable CTE of 3 to 7 ppm/°C. The films were evaluated for use in multilayer boards (MLBs) which require thin interconnect substrates with uniform controllable coefficient of thermal expansion (CTE), excellent dielectric properties, low moisture absorption, high temperature capability, and simple reliable processing methods. We found that ordered polymer films surpass the limitations of fiber reinforced resins and meet the requirements of future chip-to-chip interconnection. 

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