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Questions related from Billa Narasimha Rao
While calculate Volume shrinkage of sealants, I need to weigh the sample in air and test liquid. Can you please suggest how to weigh in test liquid? What kind of set is required? Please suggest....
15 May 2021 6,144 0 View
How can we improve the impact resistance of polyurethanes? Which isocyanate will be better? Thank you for valuable time?
19 July 2019 7,156 6 View
does shape memory polymers are sub class of stimuli responsive polymers?
30 November 2018 9,744 3 View
does shape memory polymers comes under responsive polymers? how to distinguish shape memory polymers and responsive polymers?
30 November 2018 8,966 1 View
Dear all, Can you please share, if you come across any reports on the degradation kinetics of PEG based polyurethanes in PBS? Polyurethanes of PEG/PCL? and TDI/ MDI/ IPDI? Thanking you in advance...
29 May 2018 3,311 5 View
Dear all, Can you please share, if you come across any reports on the degradation kinetics of PEG based polyurethanes in PBS? Polyurethanes of PEG/PCL? and TDI/ MDI/ IPDI? Thanking you in...
23 May 2018 2,942 1 View
Dear all, I want to calculate the hydroxyl value or OH functionality of PEG from 1H NMR. Is it possible to calculate as end functionality as in the other oligomers..? What will be the degree of...
06 June 2017 4,862 5 View
If the PDI of a polymer is 1 it means all the polymer chains are of same molecular weight. an ideal case. What does it mean if the PDI of the polymer is 2? is it possible?
25 April 2017 6,676 6 View
Dear all, Thanking you in advance for your valuable time. Cross polarization (CP)/magic angle spinning(MAS) NMR Spectroscopy is strictly for solid samples? or we could analyse semi solids/high...
03 June 2016 4,199 4 View
