Amit Dharia

10 Questions 23 Answers 0 Followers

Questions related from Amit Dharia

Why the density measured using a digital density meter (M20) is higher than the actual?

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 6,538 0 View

Flame retardant polymer composition analysis?

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 390 2 View

How to save subtraction result spectrum in the library search menu?

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 8,694 0 View

How to convert FTIR spectra files in * smf form?

I am using Shimadzu FTIR 8400 with a newer version of the software from Shimadzu.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 9,554 1 View

Does Tg between first and second heating shift for foam sample?

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 9,428 0 View

How to determine amount of multiple inorganic fillers in composite using TGA?

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 9,665 7 View

What causes a very broad endotherm before primary melting in DSC of PPS?

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 5,685 4 View

Can anyone help identifying residue on injection mold from FTIR?

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 7,537 1 View

Does anyone have a Carrie Mead CSL 550 constant stress cone-plate rheometer with ETM?

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 1,569 0 View

Why DSC base line is not flat?

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 7,229 9 View