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Questions related from Leonid V Vladimirov
What are the best solvents to precipitate Aromatic PolyAmic Acid from its solution in DMF or DMAC?
09 January 2018 6,816 2 View
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...
23 December 2017 9,503 3 View
It is well known that by using NaOH solution it is possible to completely reverse the reaction which - through Poly-Amic Acid (PAA) results in formation of Fully Imidized Polyimide - down to...
23 December 2017 5,930 2 View
How to obtain a sticky layer on Teflon Substrate? What sort of treatment could you recommend to make the Teflons surface possessing tackiness ?
16 December 2017 8,689 2 View
Which solvent or a combination of solvents could you propose for controlled swelling of Cellophane film
18 August 2017 1,456 1 View
Adhesives with operation temperatures > 200C for bonding heat-resistant polyimide and/or polybenzimidazole films ?
18 August 2017 3,927 0 View
How to achieve unhindered descent of Kapton tape from conveyor belt without using silicone pretreatment ? Silicone treatment of the belt surface by using di- or tri-methyl-Chloro Silane or by any...
15 August 2017 7,757 1 View
What is the easiest method of how to obtain Cellulose films free of ions
09 August 2017 4,470 8 View
Do you know inorganic substances with refractive index > 4.5 ? OR - what is the maximum refractive index of ANY chemical substance you know ? ( Ge has refractive index 4.0-4.07 - the highest I...
15 May 2017 5,459 2 View
There is a number of of so-called pressure-sensitive polymer resins used as a sticky cover layer for preparation of sticky Polyimide films e.g., polyacrylates, resins based on siloxane polymers....
24 July 2016 7,356 1 View
Which Blowing Agents would be best to prepare rather soft foams based on Aromatic Polyimides ? Leonid
19 April 2016 199 0 View
What additive to bismaleimide resins could most effectively improve the impact strength of the entire composition ???
19 April 2016 2,945 3 View
I'd appreciate examples of Thermoplastic Aromatic Polyimide processed in 1 stage ? The common way to fully imidized Aromatic Polyimide (PI) consists of TWO stages: 1. Synthesis of polyamic acid...
26 February 2016 3,540 2 View
All we know that every individual is unique - and that is in particular why one needs only few hours of sleep to get fully refreshed and ready for the next day work (or to face/to fight the...
25 February 2016 8,214 13 View
What would be the best stabilizing agent/surfactant for nanoparticles of silica in aprotic solvent?
11 January 2016 8,925 7 View
Which sort of plasma treatment would be the best to substantially improve adhesion to the surface of Kapton films ?
28 December 2015 9,401 3 View
In case of surface pretreatment of Kapton films - what should be thickness of Kapton layer affected by employed for pretreatment technique - to achieve strongest adhesion ?
28 December 2015 1,229 2 View
What is the most effective method to improve adhesion to Kapton film for preparation of laminates with films made of metals as well as with films made of widely used polymers?
28 December 2015 6,695 2 View
Which Aromatic Diamine could be recommended to replace (MDA) 4,4' Methylenedianiline suspected as acute hazardous substance ? Throughout many years 4,4'-Methylenedianiline (MDA) was widely used in...
18 December 2015 6,372 5 View
How to avoid the cohesive bond failure in coatings for copper applied to fight oxidation ?
13 December 2015 415 11 View
Are there any blowing agents for preparation of polymer foams?
19 November 2015 1,434 3 View
