polymerization Definition and 23 Threads

I am working on my Thesis in which i synthesised PLA out of L-lactic acid. I am using the Methods from a research paper from the HEIA-FR which i linked here aswell. https://www.chimia.ch/chimia/article/view/2012_951/4616 The second step is to perform a polymerisation of pure lactic acid to a...

Let's say you have n glucose monomers. (C6H12O6) n You want to find out how many possible polymers exist in combining those n number of glucose molecules randomly. So glucose_1 has 6 OHs that can combine with glucose_2 which also has 6 OHs. Starting with glucose_1's first carbon C1, at that...

Hi everyone! I did some multiple choice tasks and got stuck on two statements: "In RNA, the sugar is present in the 2'-endo conformation". This statement is false, but why? What conformation does the sugar molecule have? How do I recognize the conformation? "When two nucleotides polymerize...

Homework Statement Consider a “true macromolecule” - a chunk of polybutadiene network of mass 100g. How many monomers all covalently bonded together does it contain if the molar mass of the monomer is Mmon= 54g/mol? What is the molar mass of this macromolecule? Homework Equations Molar mass...

I'm wanted to do an experiment with interfacial polymerization; producing nylon 6,10 with sebacoyl chloride and hexanediamine. I was wondering what aspects of this reaction I could research, or what variables I can change?

I'm very interested in researching polymerization chemistry for my school science fair. All the ideas I have are either too expensive or not complex enough.

Hi everyone, So I'm a chemical engineering grad student and oddly enough I have been tasked with doing chemistry (strange I know). I'm currently doing atom-transfer radical polymerization (ATRP) using a metal (CuCl or CuBr) and a ligand (dNbpy or PDMETA). My monomer is a methacrylate group...

Homework Statement What three conditions or ingredients are necessary for polymerization to occur? The Attempt at a Solution I know that carbon is necessary because it is the only element that can form complex molecules readily in nature. But when i try to research this problem it seems there...

Hi! I recently did a lab where my group was to create a polymer via free-radical polymerization. We used acrylamide and potassium persulfate. We DID NOT use bis acrylamide crosslinker ( wasnt in our lab manual for some reason.) I cannot find any web resources that show how acrylamide...

Homework Statement Please see attached for problem statement and table of bond energies. My chemistry background is awful and this is from a materials science textbook. The question is, how would I approach/solve 2.31 (only parts b and c).Homework Equations The Attempt at a Solution We go from...

Does branching occur during free radical polymerization of ethylene even at high temperatures and pressure or only on other type of monomers using free radical polymerization at lower temperatures? I was reading this article: http://en.wikipedia.org/wiki/Polymerization It was not very...

In a very similar way to my first post ever, a short series of reactions came to mind that could be seen as apparent magic. You could use it for gaining instantaneous fame in a party, convincing people into pay attention to chemistry in basic levels of education and in conjunction with a time...

Homework Statement The polymerization of ethylene to linear polyethylene is represented by the following reaction nCH_{2}=CH_{2} \rightarrow (-CH_{2}-CH_{2}-)_{n} where n=large integer value Calculate the enthalpy of polymerization per mol of ethylene at 298K if average bond enthalpies of bond...

TPR: I need to find or create a solvent based glue for TPR. Is there something I can purchase that will chemically bond TPR to itself? The application is a simple TPR molded sample we got from china, we had to cut it open to get to the electronics and now we need to glue it back together...

Homework Statement The polymerization of propene to polypropylene progresses through a radical mechanism. Complete the propagation step of the reaction mechanism diagram by drawing in the missing lone pairs, radical electrons, atomic charges, and electron-flow arrows where appropriate. 2...

What follows is a suggested mechanism for base catalyzed acetone polymerization which is based on simple nucleophilic addition series. I have divided the mechanism into three steps, shown below. In step 1, the reaction is initialized by a base catalyzed initiation into ketone-enolate resonance...

Starting out with TiCl4 and triethylaluminum, I understand how the triethylaluminum alkylates the TiCl4 and creates a polymeric TiCl3, but then an ethene molecule coordinates with a vacant site on the alkylated TiCl3? I thought titanium's highest oxidation state was +4?

So what's happening is a high speed polymerization reaction initiated by the action of laser light. An infrared beam moniters the amount of unreacted acrylate double bonds. But what is an acrylate double bond? Am I correct in saying that a double bond absorbs IR radiation? The double bond...

I am taking R-Alpha Lipoic Acid (RALA) as a supplement, however apparently it's very unstable and polymerizes at about 40-50 degrees C and becomes unabsorbable. Apparently it also polymerizes when it reaches the stomach. There are also stabilized forms such as Na-RALA and K-RALA. Now what i want...

Hi everyone, Does anyone know much about the Ziegler-Natta polymerization reaction? I used Spartan to find a transition state structure (specifically for the insertion of ethylene into Cp2ZrCH3+), and I'm supposed to use a molecular vibration (with an imaginary frequency, corresponding to...

Homework Statement When heating the methyl methacrylate reaction (methyl methacrylate and dibenzoyl peroxide) to 90-95oC, why do bubbles evolve from the solution? Homework Equations None The Attempt at a Solution I'm not sure why the bubbles form. Any hints or helpful websites?

Hey, Im doing a project on organic Chemistry and I need to find the structure for the synthesis of Orlon. However, it seems very hard to find this info on the net. I've googled everything but no info. Can somebody please help me find a website with this information? I think there may be a...

Hi, I have done simple polymerization but none like this. Can you please help me on this question. What would be the structure of the polymer produced by the polymerization of (see attached picture) Draw 3 repeating units. Thanks so much