What are the best solvents to precipitate Aromatic PolyAmic Acid from its solution in DMF or DMAC?

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Binder for reinforced plastics with fluidity temperature 100-120C, prepreg on its base containing >50% carbon filaments and examples of articles made?

Binder for reinforced plastics with fluidity temperature 100-120C, prepreg on its base containing >50% carbon filaments and examples of articles made of it. We seek for prepregs with at least...

07 August 2018 1,232 0 View

Adhesive for carbon and/or glass filaments sustaining -150C + 150C?

We need Adhesive for carbon and/or glass filaments sustaining -150C + 150C? It may be like PolyAmide Imide adhesive or adhesive cured by UV, or any combination of adhesives.

07 August 2018 3,057 5 View

Polyimide based on Diamine R?

Polyimide based on Diamine R? for preparation of thermal-resistant Polyimide powder

05 June 2018 871 2 View

What is more important than success in our Living?

My previous question was: """To be successful in life - what does it mean?""" Almost all the answers to this question were about: "What is the Success? and how to reach the success" - a...

03 April 2018 2,187 96 View

How to remove from the Metal surface the PSA adhesive?

How to remove from the Metal surface the PSA adhesive by using non-aggressive solvents? What type of solvents would you recommend? at what temperature?

03 April 2018 5,711 6 View

How to obtain a precipitated powder of Poly-Amic Acid based on aromatic diamine and aromatic dianhydride?

How to obtain a precipitated powder of Poly-Amic Acid (PAA) based on aromatic diamine and aromatic dianhydride? It is well known that for several Aromatic Polyimides (PIs) in the course of...

11 December 2017 2,284 2 View

Band assignments for FTIR spectra of Ground Rubber Tire Crumps?

FTIR spectra of GRT are difficult to "read" because of carbon filler. The bands are broad and have of very low intensity. As a whole the contribution of the spectrum of GRT to the total spectrum...

09 October 2017 7,108 6 View

Thermo-resistant Rubber for Gumming Calender Shaft?

We are looking for manufacturer/supplier of Super-Thermo-Resistant Rubber for Gumming Calender Clamping Shaft. We'd greatly appreciate an advice concernig: type of Rubber and Suppliers.?

09 October 2017 2,355 0 View

What plasticizers could you recommend for Cellophane film?

What plasticizers could you recommend for Cellophane. How to plasticize Cellophane - at some stage of film manufacturing ? or via swelling ?

07 August 2017 1,550 5 View

The best method of dissolution of Cellulose ?

What is the easiest method of how to obtain Cellulose films free of ions

07 August 2017 5,049 9 View

What is the solvent for 8YSZ nano material?

I need to do some experiment with it in liquid form.

07 August 2024 613 3 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

Determining the worth of a point improvement in Hamilton Depression Scale?

Dear readers, Thanks for your attention. I am wondering about the health economic problem of quantifying the value of interventions which a) prevent, b) improve symptom profile and c) ultimately...

05 August 2024 3,246 1 View

Which solvent is better to dissolve with secondary metabolites extracted from fungi?

I work on MCF7 cell cell for anticaner purpose and I wa to do drug preperation the drug ( secondary metabolites extracted from Aspergillus) My question which solvent is better with these secodary...

03 August 2024 4,725 2 View

I need to dissolve stigmasterol for an animal experiment, it hasn't dissolved in either DMSO or vegetable oil. Can anyone recommend the best solvent?

Hello everyone, I need to dissolve stigmasterol for an animal experiment, but it hasn't dissolved in either DMSO or vegetable oil. Can anyone recommend the best solvent for stigmasterol?

01 August 2024 7,504 2 View

Conjugation of PEG-Amine to an Amino Acid Using EDC?

I am attempting to conjugate PEG to an amino acid at the C-terminus, for the purposes of producing nanoparticles. I have been told that PEG modified with amine groups can be used for this purpose,...

31 July 2024 2,033 1 View

Is it possible to use a safer acid instead of monochloroacetic acid to convert bacterial cellulose to carboxymethyl cellulose?

Hi, researchers, Is it possible to use a safer acid instead of monochloroacetic acid to convert bacterial cellulose to carboxymethyl cellulose?

29 July 2024 4,570 0 View

My cfDNA extraction protocol using silica beads works with plasma collected in COD SAGM bags but not with plasma collected in K2 EDTA tubes. Why so?

I am currently performing cell-free DNA (cfDNA) extraction from plasma using an in-house developed kit that employs silica-coated magnetic beads. My protocol works effectively with plasma obtained...

28 July 2024 3,559 0 View

What is the Principle of Cysteine-carbazole-sulfuric acid reaction with glucose?

I have been looking for the principle of Cysteine-carbazole-sulfuric acid reaction in research papers and books, but couldn't find it. This reaction is mainly used for the quantification of...

23 July 2024 3,891 0 View

Why methanol and sulphuric acid used in the analysis of polyhydroxyalkanoates (PHA) by GC-MS?

Why methanol and sulphuric acid, used in the analysis of polyhydroxyalkanoates (PHA) methyl esters by GC-MS? Additionally, why do we typically use non-polar solvents in GC-MS?

22 July 2024 1,210 2 View