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Questions related from Amit Dharia
I use a digital density meter M20 to determine the density of materials. Until recently it was working accurately but now it is giving higher values than the actual. The weight readings in the...
02 June 2023 6,599 0 View
Can anyone recommend a lab to test 4" x 4" sheets for X-Ray attattenuation per ASTM F 2547-18 or 3094-14? preferably in Dallas, Texas area. [email protected]
31 October 2022 867 0 View
I have a molded electrical connector. The density is 1.30 g/cc. In the air, the inorganic residue in TGA or ASH test is 12-14%. The FTIR of inorganic residue shows silica (SiO2). XRF analysis...
11 July 2021 439 2 View
I have an unknown compound X. Using the IRsolution search function, I searched the library and found A in Compound X. Using the subtraction function (still in a search mode), I subtracted A from...
02 July 2021 8,740 0 View
I am using Shimadzu FTIR 8400 with a newer version of the software from Shimadzu. The output files now have *.SMF format and cannot be saved in earlier *irs format. . The ThermoFisher spectra...
02 June 2021 9,635 1 View
Under identical test conditions, does Tg measured using DSC shift between the first heat and second heat? What causes such a shift? Size, shape and weight, rate of heating, etc affect Tg. What...
24 November 2019 9,494 0 View
I am trying to determine OIT of PE using DSC and TGA. Process is heat 5 mg, 1mm thick unstabilized HDPE on open Al Pan under Nitrogen (200 mL/miniute, 50 psi, introduced in DSC) to 190 C,...
19 June 2019 1,745 3 View
I have a polymer composite with Magnesium Hydroxide (MDH), CaCO3 and glass fibers. I would like to determine exact amount of glass fiber using conventional TGA. I sue N2 up to 650 C and then air...
08 December 2018 9,711 7 View
I'm seeing a very shallow and a broad peak ranging from 100 C to onset of melting in DSC of glass fiber filled PPS. TGA shows no volatile. It is also not a re-crystallization peak which...
03 December 2018 5,740 4 View
PP co polymer when molded has an odor. We collected yellow color residue left on the injection mold after molding this COPP. The FTIR search library gives good match but compounds identified...
05 March 2018 7,590 1 View
I am having a problem with my ETM unit. When turned on, it passes system check but then displayed flashing error -Heater OFF/ over heated. Tc from Hot plate is working and fuse is also intact.
10 November 2017 1,611 0 View
I am using Seiko RDC 220 and having some issues recently. With blank run (no pans), I am noticing a parabolic baseline, i.e. it is sloping downward and then rising again and sloping upward....
26 October 2016 7,288 9 View
