Md. Arifur Rahman

7 Questions 42 Answers 0 Followers

Questions related from Md. Arifur Rahman

Can you name some monomers which can expand thermally after polymerization?

Looking for some small molecules which can expand thermally in confined intermolecular spaces after polymerization (anionic).

04 April 2016 9,124 2 View

How does one calculate the molecular weight of entanglements of an ultra high molecular weight glassy polymer?

Some viscoelastic analysis indicated that the ultra high molecular weight PVAc homo polymer may contains physical cross linking due to the entanglements. How can i calculate the mol wt of the...

08 August 2014 6,895 6 View

Is there any model to study the thermal conductivity/heat conduction in multilayer foam/film systems?

Currently, I am working with a system that is basically assemblies of alternating solid and porous polymeric layers (figure is attached). I am interested to study the thermal conductivity of such...

02 February 2014 10,084 3 View

How to measure the total reflection of a film?

Currently, I am looking for a way to measure the total reflection of a reflective film. I am using an UV instrument equipped with a reflection mode and it measures the absolute reflection of the...

09 September 2013 5,318 5 View

Can anyone give an example of a natural material which is porous but transparent? Or has a layered porous structure?

I am looking for the example of a natural material that has a multilayered porous structure and is optically transparent.

05 May 2013 1,637 19 View

Is reversible hydrogen bonding possible in epoxidized natural rubber (ENR)?

ENR posses high polar group contents possibly due to the random epoxidation of polyisoprene backbones. Partial ring opening of epoxide group can contribute to OH group formation and thus able to...

11 November 2012 9,663 2 View

What is the chemical/structural origin of stickiness in Epoxidized natural rubber?

Inspite of having higher Tg, Epoxidized natural rubber (with 25 and 50 mol% epoxidation level) exhibit higher stickiness than the synthetic polyisoprene (cis). Why?

09 September 2012 9,789 2 View