Polymer Chemists' Network | Contact experts in Polymer Chemistry to get answers
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Questions related to Polymer Chemistry
I am trying to make hollow fiber membrane using non-solvent induced phase separation (NIPS). My dope is very viscous and I find it hard to degas the dope solution. I have read through a few...
21 July 2020 7,663 3 View
I'm trying to use the aluminium complexation reaction for flavonoid content in wine but I find that the color of my solutions don't match with literature data and the sample doesn't absorb much at...
17 July 2020 9,559 2 View
my NMR signals, both in 1H and 13C, vary only slightly in ligand and complex. However the metal precursor signals are present in the complex nmr along with the ligand signals. Is it possible?
09 July 2020 6,142 16 View
Is it possible to estimate the polar and dispersive surface energy components from MD simulation?
16 June 2020 7,344 1 View
During the calculation of IC50 value of any sample in the DPPH induced antioxidant test, after plotting % Inhibition vs concentration values in the graph, should I select a linear or logarithm...
15 June 2020 7,588 1 View
I need PEG 400 with water content as low as 1%. Commercially available PEG 400 has higher water content. There is a protocol of drying PEG on protocol exchange...
09 June 2020 4,376 1 View
Hello everyone Pore size is very important incase of any type of memebrane. I want to know the ways by which one can control the pore size.
31 May 2020 2,546 0 View
I am after understanding the interaction between an amino acid with an interacting partner of a protein. I was wondering whether aromatic stacking is stronger than hydrogen bonding or not (which I...
31 May 2020 8,962 6 View
Hello experts, I am using MestReNova software for NMR data processing and plotting, but I am unable to find out an option by which I can show the integration and peak values in the stacked...
28 May 2020 6,769 3 View
In the literature three crystalline forms (alpha, beta and gamma) have been reported for PLA. As I learnt they have different crystallization behaviour. Using the DSC technique, with a...
22 May 2020 7,796 2 View
Mostly, 1 mV/s scan rate is used for the potentiodynamic polarization test of the Aluminium alloys in literature. However, according to ASTM, the standard scan rate is 0.1667 mV/s. Does 1 mV/s...
08 May 2020 9,954 3 View
Hi, I have around 12 factors and one dependant variable. I get totally different result (change in odd ratios and significance) for many factors when I only include 11 factors (out of total...
06 May 2020 9,428 3 View
I used BSA(bovine serum albumin)and TPPS(tetra phenyl porphyrin sulfonate) for the experiment. I got spectrum like photo i attached. It is my first time to do this kinds of experiment and...
01 May 2020 7,693 8 View
Hello, I have been playing around with Materials Studio's polymer builder in order to create a polymer to use for LAMMPS. My monomer, however, has 4 possible reaction sites (ie 4 vinyl bonds). I...
30 April 2020 7,862 0 View
O/W emulsions are used as drug carriers. I was wondering what is the standard protocol for measuring the release of the drug from its carrier emulsion. I am more interested in current practices in...
29 April 2020 979 0 View
What are the easy methods for synthesizing UV curable resins? I need to synthesis UV curable coatings. MMA seems to have good features for transparent coatings, but the additives and synthesizing...
25 April 2020 3,358 7 View
What is time constant in electrochemical impedance spectroscopy (EIS)? And how to define them from measured results?
16 April 2020 6,262 3 View
I have been thinking for a while about the following question: compare the physical properties of PVC and PC (density, heat capacity, thermal expansion coefficient and thermal resistance) I...
15 April 2020 7,304 0 View
i have a question about the comparison between the Tg, Tv and Tm of PVC and PC. both PVC and PC have a Tg since they are amarphous, but is there a possibility that they also have a Tv and Tm due...
15 April 2020 5,121 0 View
1. Molecular weight determination methods can be classed into absolute, relative or equivalents methods. Which class does GPC belong to? 2. What is the applicability range of Gel Permeation...
11 April 2020 973 3 View
Good morning, I'm using ASPEN PLUS to simulate the thermal degradation of polyethylene terephthalate (PET) in a fluidized bed reactor, but I have to heat the plastic from ambient temperature...
06 April 2020 911 1 View
I want to model biomass pyrolysis by the following reaction set: Biomass = CO Biomass = CO2 Biomass = H2 Biomass = H2O Biomass = CH4 where Biomass is a non-conventional solid, in a RCSTR reactor....
04 April 2020 5,217 13 View
I am working on encapsulating drug in Pre-PGS by solvent evaporation method. In which organic phase is PGS dissolved in THF, drug in water with tween 20. I am getting little particles at end. But...
03 April 2020 619 11 View
How to calculate the pore size of any membrane? How to choose a particular dialysis bag based on our demand?
31 March 2020 9,972 9 View