Akanksha Adaval

8 Questions 38 Answers 0 Followers

Questions related from Akanksha Adaval

Once stretching condition is removed then why beta phase doesn't go back to alpha phase in PVDF?

We know that uniaxial and biaxial stretching induces the formation of beta/gamma phase in PVDF. So, once the stretching condition is removed then why doesn't the phase go back to its most stable...

01 December 2022 7,004 1 View

What is the difference between RAMAN and FTIR spectra?

I have come across studies which have mentioned Raman and FTIR to be complementary. So, why are some bands present in FTIR but are absent in Raman or vice-versa.

13 June 2022 6,939 5 View

Which crystalline phase of PVDF has highest/lowest permittivity and why?

PVDF-based dielectric polymers and their applications in ele... This particular paper mentions that alphas has highest permittivity but the reason is not clear for the same. Can anyone help me in...

11 March 2022 6,528 0 View

Is there any difference between the piezoelectric coefficient values expressed in pm/V and pC/N?

I need to clarify that is 1 pm/V = 1pC/N? Why there are two units? Are the methods to measure the piezoelectric coefficient in the two units, different? Kindly help! Thank you.

09 March 2022 9,453 9 View

How do we index a SAED pattern? Can we get information about no. of graphene layers from this pattern?

I have attached two SAED patterns for graphene based nanofillers. Can anyone guide me through the indexing of the said patterns? And also, is it possible to find out the number of graphene layers...

06 August 2021 4,533 8 View

Decrease in Onset of Degradation Temperature in PVDF/Filler Composites as compared to pure PVDF. Why?

I am observing a decrease in the filler incorporated PVDF composites as compared to pure PVDF. This means that the thermal stability is decreasing. Even though the polar phase formation is...

05 March 2021 547 3 View

What is the difference between Graphene Oxide and Expanded Graphite?

What are the main differences between Graphene Oxide and Expanded graphite, in terms of surface functionalities, conductivity, d-spacing and other features? Is the term expanded graphite...

07 February 2021 10,055 4 View

What is the optimum sample thickness for calculating d33 through AFM?

I have polymer composite film samples. The thickness of my sample is around 1.5 mm. While calculating piezo-coefficient via AFM, there is no response. Can anyone let me know the optimum sample...

15 December 2020 3,983 10 View