A chain growth polymerization is conducted using 1.50 mmol of monomer, 0.0005 mmol of catalyst, and 0.0025 mmol of initiator. Calculate the number of repeat units in each polymer chain.
Number of repeating units = mole of monomer / mole of initiator
Number of repeating units = 1.50 mmol / 0.0025 mmol
Number of repeating units = 600
A chain growth polymerization is conducted using 1.50 mmol of monomer, 0.0005 mmol of catalyst, and...
A living polymerization is carried out using 150 mmol of 4-chlorostyrene and 1.2 mmol of initiator. Calculate the degree of polymerization (Pn) and number average molecular weight (Mn) of the polymer obtained if the conversion was 100%.
Polystyrene can be polymerized from the starting monomer (styrene) pictured below. a. Anionic polymerization is one method of polymerization that can be used to generate polystyrene from styrene. Explain what type of initiator should be used for this reaction and draw an example of a styrene monomer that has reacted with initiator. b. Using this anionic polymerization method and a starting concentration of 1M styrene and 1mM initiator, what degree of polymerization (Xn) would you expect if you use up...
Draw a mech. For polymerization using butylithium as initiator. Show the initiation one chain propagation step and use H+ to terminate growth.
6. Write chemical reactions for a generalized mechanism of a Ziegler-Natta polymerization of ethylene using TiCl4/AlCl2Et as the catalyst/co-catalyst for each of the following steps (curved arrows are not necessary): a. Monomer coordinates to the metal center b. Chain growth proceeds through the addition of further monomers by migratory insertion c. Termination occurs by a transfer reaction with the monomer, or d. Termination occurs by B-hydrogen elimination
6. Write chemical reactions for a generalized mechanism of a Ziegler-Natta polymerization of ethylene using TiCl/AICIEt as the catalyst/co-catalyst for each of the following steps (curved arrows are not necessary): a. Monomer coordinates to the metal center b. Chain growth proceeds through the addition of further monomers by migratory insertion c. Termination occurs by a transfer reaction with the monomer, or d. Termination occurs by B-hydrogen elimination
The radical polymerization reaction creates a new stereocenter each time a monomer adds to the growing chain. The stereochemical configuration is random each time, meaning there are many different stereoisomers formed. Calculate the number of stereoisomers possible for a chain that has 8 stereocenters.
ensation polymerization Make models of a new monomer using the provided paper clips. Your new monomer unit will be made from a combination of one regular paper clip and one colored paperclip. Make 4 total monomers, where each monomer unit represents a mole of that monomer. 2. Consider your monomer unit having two chemical parts, the regular clip with a molar mass of 244.33 g/mol and the colored paper clip with a molar mass of 18.02 g/mol. What is the...
2. (4 pts) Poly(vinyl alcohol) (PVA) is a commercially available polymer that can be synthesized by chain-growth polymerizations. However, using the vinyl alcohol monomer does not work. » AIBN , tit Он 65°С No polymerization! a) Briefly explain why vinyl alcohol doesn't work for this polymerization. What compound would form in the scheme shown above? b) Propose an alternate route to the synthesis of PVA.
The purpose of this experiment is to synthesize a polymer using a Gilch polymerization of 2,5- bis(bromomethyl) - 1 -methoxy-4-(2-ethylhexyloxy) benzene, to investigate the polymer's photophysical properties, and to understand the mechanism of the polymerization reaction. Introduction Poly(p-phenylene vinylenes), or PPVS, are highly luminescent polymers that are used for a variety of commercial applications. Their general structure is shown in Figure . PPVS can be synthesized via a number of routes, including a Gilch polymerization reaction, which will be used...
Please help look this over I just want to double check my answer! thanks! Critical Thinking Questions: 2) The polymerization of ethylene ("monomer") with a radical initiator follows the same chain reaction. Please write the mechanism (all arrows) from ethylene (==ethene) to polyethylene). Start with an initiator of R-R. After breaking the initiator bond to your radicals, use either radical for your 1"' reaction with ethylene. Indicate repeating reactions by multiple arrows. Write the final product in a common short...