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
1,080 views 883 posts
Questions related to Polymers
I do not have experience with the determination of the zeta potential of dispersions. Can anyone explain the bimodal distribution of the zeta potential obtained in the result measurement?
17 May 2021 1,283 2 View
I'm working on a project to 3D print silicon. I have designed a nozzle where the two-part silicon polymers will be mixed and will then be extruded. In order to test the design, I need to perform...
11 May 2021 9,521 2 View
I could not find any specific name.
06 May 2021 7,331 3 View
What is thermal drift and what are its causes ? I did nanoindentation of a polymer nanocomposite. To know the thermal drift, at the end of unloading, low load of 0.01 mN was held constant for 70...
05 May 2021 3,094 4 View
Hello there. Has anyone used the BCA method to determine the protein content of chitosan? What solvent do you use to dissolve chitosan? Did you use 1% acetic acid or another solvent? I will be...
26 April 2021 7,769 5 View
Hi everyone. I have a question about the determination of zeta potential for polymers because some of my polymers form an aggregate in solution ( at different pH), making it difficult to...
21 April 2021 7,546 2 View
I want to synthesize porous organic polymer. please guide me.
18 April 2021 8,531 2 View
I have four unknows microfiber and their Raman spectra. They supposed to be microplastics (polymers). I have compared the spectra with PP, PE ,PS, PET, PVC, Nylon, Cotton, PU, PEG (PEO), but no...
05 April 2021 1,645 4 View
Hello, I am working on developing a thin film for solar steam generation from the surface of water. In the literature I have noticed polymers like Polyethylenimine and PolyDADMAC...
03 April 2021 1,694 3 View
Hello, I would like ask a question about I have mentioned above point, How could we calculate Polymer Critical Entanglement concentration? and Is this possible of measuring viscosity by...
24 March 2021 9,959 5 View
Dear all, I hope this message finds you well. Given that thermal strain of FRP polymers (i.e., GFRP, CFRP, BFRP, and AFRP) vary notably at elevated temperatures in longitudinal and transverse...
17 March 2021 2,766 4 View
Good Afternoon Everyone.. i hope you are doing well and happy..... I have several Doubts about Polymer Coating Field. Please give me a solution to my problem.... 1.what is the use of polymer...
05 March 2021 6,266 11 View
Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...
01 March 2021 8,185 2 View
Hi! I am looking for some specific information in regards to the minimum amount of UV intensity required to begin the photo degradation process in polymers. I understand each polymer is...
16 February 2021 7,926 4 View
I am modeling CFRP laminated a concrete column in Abaqus And I need Elastic and plastic properties of CFRP
10 February 2021 5,069 5 View
I am trying to find methods for theoretical calculation of enthalpy of formation of Polymers. till now I have found the oligomeric method (Gaussian) which uses the extrapolation of results from...
06 February 2021 9,914 4 View
I am trying to simulate permeation of gases in polymers. For this reson normally i use the clasic models like dual sorption model but newly i foun dthe non equilibrium lattice fluid model. It...
04 February 2021 1,342 3 View
Hi everyone, I am preparing liposomes and I would like to know for how long lipids can be stored in a -20 °C freezer, please? At the moment, I am working with DOTAP, DOPE, Cholesterol, and PEG,...
03 February 2021 7,269 7 View
Hello, I am a bit confused on whether to follow ASTM D785 (Standard Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials) or ASTM D2240 (Standard Test Method for...
22 January 2021 7,635 4 View
I have melt mixed to thermoplastic polymers. But I want to know the homogeneity of the composite. What are the methods to determine whether the composite is homogeneous or not? Please help.
21 January 2021 9,225 5 View
In my TGA curves related to liquid polysulfide resin-clay nanocomposites, for neat LPS and LPS/CNPs 1% , a small peak can be seen in higher temperatures as in following fig. what can be an...
12 January 2021 4,863 5 View
A sample of Polyethylene has an average degree of polymerisation of 1200. What is the coiled length and the extended length of an average molecule given the bond length is 0.154nm and the bond...
11 January 2021 7,053 3 View
The blade that could cut ceramics, or the one that could cut plastics and polymers?
07 January 2021 2,824 3 View
As different polymers with different characteristics are exist,I want to know What polymers can be used for packaging an orthobiologic product(bone allograft),which can have enough resistent to...
23 December 2020 8,300 5 View