Amit Kumar

6 Questions 5 Answers 0 Followers

Questions related from Amit Kumar

Appropriate UV source for exposure to SU-8 negative photoresist ?

Can UV viewing cabinet which have a UV light 365 nm be used for UV exposure, instead of a mask aligner which preparing a SU-8 negative photoresist mold ?

06 April 2021 4,264 0 View

Can Davies' equation for calculation of HLB of surfactant be applied to zwitterionic surfactants ?

Davies' equations suggests group numbers for specific hydrophillic groups, which can be used for calculation of HLB of non-ionic, anionic and cationic surfactants. Can these values be directly...

31 August 2018 6,181 2 View

Why does CMC of a surfactant increases or decreases with change in temperature ?

The CMC of surfactant is found to decrease and then increase with increase in temperature. Any particular phenomenon for this behavior ?

07 August 2017 1,569 9 View

Surface tension measurement using Pendant drop method ?

While taking Surface Tension readings using Pendant Drop method, the reading continuously decreases with time for surfactant solutions. For some surfactant concentrations drop breaks from needle...

26 December 2016 6,908 6 View

Why is N-hydroxymethyl acrylamide monomer soluble in water but its polymer is not soluble in water?

Monomer of N-hydroxymethyl acrylamide is soluble in water but its polymer is not soluble in water. Similar property is observed for N-hydroxyethyl acrylamide.

12 August 2016 9,398 4 View

Which surfactant should to be used for emulsion polymerization ?

What factor(s) should be considered for selection for surfactant for emulsion polymerization ?

19 July 2016 5,596 2 View