Does anyone have the literature explaining the effect of 4-vinylcyclohexene on the degradation of polystyrene and on the polymerisation of styrene?
i am trying to find outh the simplest and accurate method of determing the amount of free/residual 1.3-butadiene and styrene from in process latex/polymerization. my challenge is to accurately...
03 April 2015 609 3 View
We specialize in a styrene-butadiene emulsion polymerization, we run conversion to 60% and we recover the unconverted (1,3- butadiene) at a purity of average of 73% and major impurity is (cis-2...
31 December 2014 8,664 4 View
We specialize in emulsion SBR manufacturing, in the storage tanks we sometimes experience latex auto-coagulation that forms rubber gel, and as a result we have to dump these gel crumbs. Any idea...
31 December 2014 3,380 9 View
we specialise in cold polymerization of styrene and butadiene, and we are loosing butadine during polymerization in dimerization to (4 -vinylcyclohexene) about 8% is found during GC analysis i...
11 December 2014 5,164 5 View
we specialize in styrene-butadiene emulsion polymerization, we run conversion to 60%, and we recover the unconverted (1.3 butadiene) at a purity of average of 73% and major impurity is (cis-2...
11 December 2014 2,683 1 View
i am having a problem with color of sb rubber (1502) having a yellowish/brownish color, i would like it to be as white as possible, reciep used: soap-fatty acid and SA40...
10 November 2014 5,462 6 View
i would like to change from sulphuric acid to organic acid as coagulating agent for SBR, and i would like to know the advantages and disadvantages with regard to this change
10 November 2014 4,610 1 View
I would like to improve the stripping of styrene from an emulsion batch(Semi-continuous batch process). We transfer batch from reactor to stripper and inject direct/live steam at stripper bottom...
10 November 2014 2,518 12 View
I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...
08 August 2024 8,329 0 View
What is the most suitable experimental setting to understand the consequences of a particular gene: (1) targeted degradation of the specific transcription factor (TF) of the gene, followed by...
04 August 2024 6,265 1 View
I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...
30 July 2024 6,420 1 View
Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...
27 July 2024 5,748 0 View
It has been long known that EDC carbodiimide and NHS easter's half life agains hydrolysis are highly related to pH. However, very surprisingly, not yet found a paper giving a table/chart of their...
25 July 2024 8,738 0 View
I run mechanochemical reactions that involves the use of a large amount of catalyst (1:1 molar ratio to the reactant). When I try to understand the effect of amount of catalyst on the reaction, I...
23 July 2024 9,938 1 View
Hi, I am a PhD student working at Jagiellonian University, Faculty of Chemistry. My work is related to the development of new analytical methods for the quantification of short-chain fatty acids...
22 July 2024 5,492 6 View
I’m having difficulty achieving high RNA integrity in my samples. Although the 260/280 and 260/230 ratios are satisfactory after RNA extraction, the RNA samples show signs of degradation when...
22 July 2024 155 4 View
I know that films and other low-thickness laminated products are produced using biaxial orientation, but is there something similar for sheets with a thickness of around 6 mm? Or are they...
21 July 2024 1,559 1 View
Dear Researchers, My question is associated with the "MDCI" method in Orca. Please let me clarify my question using a simple example: Suppose we are going to perform CBS extrapolation using "!...
21 July 2024 1,632 0 View