Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules... | Contact experts in Polymers to get answers
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Questions related to Polymers
I am actually working on pharmaceutical formulations with thermoplastic polymers such as "copovidone or Kollidon VA64 and active ingredients like "Paracetamol". When i was running DSC with pure...
02 March 2020 4,113 5 View
The two polymers have been used to produce PCL/Ɛ-PL nanofibers
29 February 2020 1,716 2 View
I would like to ask you for your experiences with long-term storage conditions (shelflife) for polymers, to be specific PE, PES, PA, PP. To avoid moisture and oxygen degradation is it better to...
25 February 2020 6,634 2 View
I am trying to program a Newton-Raphson Nonlinear solver for Material nonlinearities (i.e. bilinear material) and i don't know how to define Tangential and Secant Young Moduli since the 3-node...
15 February 2020 6,544 4 View
Dear All, I'm being doing DOSY experiments to determine molecular weight of polymers and i was wondering if the peak intensities shown in the spectrum for diffusion coefficients mean...
06 February 2020 6,481 5 View
Hi every one, I wonder if the DSC heating rate affects the degree of crystallinity in semi-crystalline polymers? thanks
26 January 2020 9,024 7 View
Can polymers be used to treat polluted soils and water? What are the types of polymers
22 January 2020 331 5 View
Hello, We are working intensively on silane usage as a coupling agent for acrylic polymers. We have a resin with more than 65percent of water and an acrylic monomer, which we polymerize on glass...
15 January 2020 815 1 View
I have synthesized my polymer, which is a 30 mer. It's in powder state after purification, and it is soluble in DMSO (tried THF, Acetonitrile, etc., it seems only DMSO with sonicating works). My...
14 January 2020 8,207 4 View
After adding polyethylene terephthalene (PET) to TFA and DCM in volume ratio of 80:20 and let the PET to dissolve, the colour of the mixture solution based on journal, it should be colourless...
02 January 2020 1,217 1 View
Hi All, How to calculate 𝛿d, 𝛿p, and 𝛿h Hansen Parameters of polymers and solvents at different temperatures? I am using this Equation (Ra)^2 = 4 ( 𝛿d2 − 𝛿d1)^2 + ( 𝛿p2 − 𝛿p1)^2 + ( 𝛿h2 − 𝛿h1)^2...
31 December 2019 10,033 4 View
Greetings, I am a newbie in research and would like to ask about how do we find out the chemical "Composition" and "Structure" of a polymer material by using any accurate characterization...
24 December 2019 6,777 4 View
Any suggestion for the addition of surfactants or biofunctionalisation?
12 December 2019 4,042 3 View
In Mechanics of Tomography, a Tomogram can be defined as a "Cross-Sectional Image" of a "Slice of an Object", while the Images can be developed mechanically and/or digitally - they can even be...
26 November 2019 1,020 1 View
I've noticed that acrylamide is commonly used to copolymerize with acrylate monomers to form polymers with high swelling capacity. But I'm not sure which property of acrylamide would make it be...
23 November 2019 9,099 3 View
Hello. I don't have licensed software like Materials Studio to make a polymer chain from a monomer. Is there a way to make polymer chains without excessive coding? Thanks.
22 November 2019 7,453 2 View
Is transparency of organic compound crystal depends only on whether polymeric chain entanglement (disorderly arrangement) is on the order of wavelength of light or not? and whether the molecular...
21 November 2019 4,209 4 View
Is it possible that disulfide-containing polymers result in crosslinking of the dendrimer molecules? Did it happen? By which methods we can describe that?
19 November 2019 6,538 3 View
Nanoclay serves as an active stress transfer constituent in the nano-epoxy composites, leading to plastic deformation in the epoxy and eventually increasing the tensile strength. But, my question...
11 November 2019 5,727 2 View
Cured epoxy resins show less resistance to crack initiation and propagation. What might be the reason for the same?
08 November 2019 10,077 3 View
I am trying to put into place crosslinked polymers through varied radiation and thermal treatments which eventually is going to allow me to have polymers with different degrees of crosslinking and...
08 November 2019 8,854 3 View
It was reported that the quaternization of PECH and other chloromethylated polymers is possible with TMA provided some heating. Is it alternatively possible to proceed with the reaction without...
21 October 2019 1,298 1 View
I have used LY 556 and HY 951 in a 10:1 ratio and cured at room temperature for one week. Has anyone determined the glass transition temperature for this combination when cured at room temperature?
12 October 2019 3,525 3 View
I'm trying to make PCL aligned fibers. I've tried to adjust voltage, flow rate and needle-collector distance. Parameters : - 15% PCL in acetone (weight/volume) - Needle-collector distance: 5 to...
10 October 2019 3,163 9 View