After quenching a chain-growth polymerization via Suzuki-Miyaura coupling, normally two kinds of polymer ends are obtained. One is (polymer)-H, the other is (polymer)-Br. Why does this happen ?? Is the quenching manner different ??
The stress and strain of inorganic materials such as Si films can be measured by Raman spectroscopy. Can we analyze the stress of organic materials such as polymer films by Raman spcetroscopy ?
06 July 2017 5,680 4 View
In many cases of emulsion droplets prepared by homogenization and ultrasonication, the size distribution can be fitted by a log-normal fitting. I want to know why that is.
08 September 2014 5,780 9 View
In the acid condition, is thiol easily oxidized to disulfide or any others? I prepared 2-propanol solution containing dodecanethiol for SAM. I checked the thiol group before and after addition of...
09 October 2013 2,700 4 View
I want know how the PDMS precursor liquids cross-link. Is there any initiator inside?
06 July 2013 8,291 8 View
I prepared a PDMS film (sylgard 184), but it has absorption around 250 nm and 200 nm. Can I remove these absorption? I need transparency from 190 nm to NIR.
03 April 2013 7,275 4 View
effect of double bond on the flexibility of polymers
07 April 2021 0 0 View
I am writing to request some information for making polymer color flakes. I would appreciate the help.
17 March 2021 0 0 View
I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...
03 March 2021 7,540 4 View
I looking for ferro calcium production process
03 March 2021 1,755 4 View
Anyone can recommend any books on such topics? Thanks in advance.
02 March 2021 8,457 2 View
Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...
02 March 2021 4,119 3 View
Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...
02 March 2021 6,186 3 View
I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...
02 March 2021 1,404 6 View
As I was tweaking step-by-step OpenCalphad6 Macros step1.ocm involving phase and thermal property calculation of a High-speed steel, I could not incorporate more than 6 elements in the steel...
01 March 2021 8,840 1 View
I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....
01 March 2021 3,325 2 View