Polymer Chemists' Network | Contact experts in Polymer Chemistry to get answers
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Questions related to Polymer Chemistry
Hi, I am looking to see if I fully understand cationic epoxy cure and shrinkage. I have a highly filled cationic epoxy adhesive designed to achieve minimal shrinkage upon cure with UV light. My...
10 November 2021 7,397 1 View
I used 7 g MCC in 100 ml of 65% sulfuric acid. Temperature and hydrolysis time were 40 C and 2 h respectively. After 10 min it's became yellow and at the end it was dark brown.
10 November 2021 5,924 8 View
Dear all, How can I identify Thiobacillus genus without using postgate media and molecular identification? There is different bacteria that grow on postgate media and change the color to yellow so...
06 November 2021 6,132 2 View
This reaction may occured in my solution in auto clave.
04 November 2021 1,819 8 View
Hi Everyone, I know this question has been asked a couple of times here: what is the difference between Young's modulus and storage modulus? But the reason hasn't sunk in for me yet, so I am...
27 October 2021 9,797 6 View
Dear all, I have started to study molecular simulation for weeks, and have studied the basic theory of molecular simulation from lectures and videos. I am currently trying to do some hands-on...
25 October 2021 5,016 8 View
When electrospinning polyhydroxyburyrate (PHB) dissolved in chloroform or dichloromethane, it often solidifies and clogs the needle. It has to be cleaned from time to time. How to avoid this...
14 October 2021 5,886 10 View
This reagent was purchased from Sigma Aldrich with a 95 % grade of purity. 1HNMR shows some contaminats that persist in the amide resulting from the coupling reaction after chromatograpic...
13 October 2021 9,942 5 View
I want to measure the critical micelle concentration of the PEG-PLGA copolymer. Can I make CMC determination by loading nile red into PEG-PLGA and looking at absorbance with UV-Spectrophotometer?
12 October 2021 3,106 1 View
I want to dissolve the superabsorbent polymer. I have tried dissolving it in distilled water and methanol but it was insoluble (gel form).
06 October 2021 1,583 3 View
Is there any limit for the length of heat pipes? Can standard (conventional) heat pipes be bent? if yes, how many? Is it possible to combine several heat pipes in the adiabatic area and then...
03 October 2021 4,800 4 View
Hello. I'm trying to synthesize the polyaniline emeraldine salt but there are some problems. Its color turns green to black (or dark blue) after washing and drying. I got a green (dark green)...
30 September 2021 7,361 5 View
in Aspen plus simulation, one of options in flash calculation is choosing "vapor-liquid" equilibrium or "Vapor-liquid-liquid" equilibrium. how can I choose the right method for flash calculation?...
20 September 2021 6,957 2 View
I would like to use FLIPR assay from Molecular Devices. However, I don't have the recommended microplate reader for this experiment (with is also from Molecular Devices) but I have Tecan Spark...
15 September 2021 2,581 0 View
Recommended cell culture conditions: - Caco-2 cells are being grown in EMEM media + 20% FBS - HT29 cells are being grown in McCoy's 5A media + 10% FBS + 0.21 g/L L-glutamine I want to co-culture...
08 September 2021 2,610 0 View
I want to measure thermopower and resistivity at high temperature and connections will be done using copper paste. Please let me know the processes of cleaning sample after measurement. Is there...
08 September 2021 5,444 3 View
This is considering work that focuses on drainage or infiltration in soils and foams but considering an intermediate time case where the late-time travelling waves have not yet set in.
31 August 2021 7,792 0 View
Hi all, I am looking for selective oxidation of cellulose by chemical treatment. Although, there are some methods reported, but are plagued with producing other oxidative forms of cellulose as...
24 August 2021 5,831 2 View
Hello, In MIP sensors, monomer and target molecules are mixed together, and electropolymerization initiates polymerization to create molecularly imprinted polymers (MIP). The literature says a...
24 August 2021 3,526 3 View
Pure water freezes at 0 °C and boils at 100 °C under atmospheric pressure (1 atm). Salinity affects both the freezing and the boiling point of water. I have found that seawater (considering the...
23 August 2021 4,374 7 View
I'm a ChemE student who's trying to to simulate Haber process of Ammonia synthesis in ASPEN plus. The program requires the reaction kinetics as one of specifications for the modelling of...
20 August 2021 8,954 5 View
Two major flow mechanisms for preferential flow in unsaturated zone are the existence of macro pores or structures and wetting front stability (fingering flow). Do you have any field evidence or...
13 August 2021 9,164 5 View
When is it allowed to choose equilibrium as a class-type reaction for a CSTR in Aspen Plus? Would the results be far off selecting equilibrium for the class-type reaction? I understand that...
11 August 2021 303 1 View
Hi,I am doing a question about designing an optimum isothermal reactor to achieve a certain conversion for the oxidation of nitric oxide by minimising the reactor volume in Aspen hysys. But,I have...
10 August 2021 4,648 3 View