Answered: By measuring molecular weight as a…

By measuring molecular weight as a function of monomer conversion, describe how you can tell whether the polymerization of an unknown monomer was proceeding by a stepgrowth or chain-growth mechanism.

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter29: Organic Polymer Chemistry

Section: Chapter Questions

Problem 29.12P

See similar textbooks

Related questions

Q: 2. The Tg of poly(vinyl acetate) is listed as 29°C. If 5 mol % of divinyl benzene is copolymerized…

A: The Answer to the following question is-

Q: A solution (1 dm3) of styrene (H2C=CHPh, 1 mol dm–3) in tetrahydrofuran was polymerised by addition…

A: The molecular mass is an important property in the polymerization. It is an indication of the amount…

Q: 2. A solid sample of one of the following polymers (PETE, PP, PVDC and PTFE) was found to be…

A: A solid sample of one of the following polymers (PETE, PP, PVDC and PTFE) was found to be insoluble…

Q: In a free radical polymerization that proceeds without chain transfer, what is the effect of (a)…

A: The explanation is given below-

Q: It is intended to toughen poly(methyl methacrylate) (PMMA) by the addition of particles of rubbery…

A: No, I would not expect the material to retain its clarity. This is because of reasons written in 2…

Q: An amionic polymerization is proceded in tetrahydrofuran and 1,4-dioxane, respecively. Anionic…

A: Anionic polymerization is a chain growth polymerization. Anionic initiator will transfer electron…

Q: The mol/L concentrations of styrene (M1) and acrylonitrile (M2) used for copolymerization, and % by…

Q: Ziegler-Natta polymerization can produce isotactic polymers of 1-hexene. Review the propagation…

A: The polymerization of 1-hexene produces polyhexene molecules. The reaction is catalyzed by special…

Q: a. Write down the reaction schemes to prepare styrene-butadiene-styrene block copolymers (SBS…

A: Hello. There are multiple questions posted. The first question has been solved. To receive solutions…

Q: What is the polymerisation reaction from initiation through to termination for the polymerisation of…

Q: The length of a polymer chain is commonly expressed by the degree of polymerization (D.P.) which is…

A: Welcome to bartleby ! As per company norms we cannot solve more than one question per session .so ,I…

Q: Compare anionic vs. cationic ring opening polymerization: 1. monomer 2. initiator 3. general…

A: Given Compare anionic vs. cationic ring opening polymerization: 1. monomer 2. initiator 3. general…

Q: Define Mechanism - Ziegler–Natta Polymerization of CH2=CH2 ?

A: Ziegler–Natta catalyst is a type of catalyst made from a mixture of chemical compounds that are…

Q: Styrene (3.0 M) is copolymerized with methacrylonitrile (1.5 M) in benzene solution by adding…

A: Note: We are authorized to answer three subparts at a time, since you have not mentioned which part…

Q: rive an expression for the rate of polymerization of stoichiometric amounts of adipic acid and

Q: Two samples of polystyrene, samples A and B, were synthesised. A from the addition of n- butyl…

A: Introduction: Polymers: Polymers are the large molecules made up of repeating units. The physical…

Q: A solid sample of one of the following polymers (PETE, PP, PVDC and PTFE) was found to be insoluble…

A: PETE, PVDC and PTFE has either halogen atom like chloro, fluoro group or ester group in monomer unit…

Q: Calculate the acid number of a polyester with the molecular weight of its repeating unit of 120…

A: Acid number (AN) of the polymer describes the number of free acid that can be neutralized by the…

Q: write the Zigler Natta catalyst?

A: The Zigler Natta catalyst is synthesised from the reaction of titanium tetrachloride with triethyl…

Q: Show the mechanism for the formation of a segment of poly (vinyl chloride) containing three units of…

A: To draw: Reaction mechanism for the formation of poly vinyl chloride in the presence of H2O2.

Q: Structure

Q: Q1) Describe in detail Process of Adsorption, its types and Industrial application.

A: Adsorption is the accumulation of the molecules at the surface of the material. It is surface…

Q: (CH,), -N- nylon 6 the O H H (CH,), -C-N-(CH,),2-N- nylon 6,12 In What is the mole fraction of…

A: The number average molecular weight of a polymer can be written as the product of number average…

Q: For end-group analysis, 0.8632 g of a carboxyl terminated polybutadiene (CTPB) sample dissolved in…

A: The amount of potassium hydroxide, KOH, used in the titration is; mKOH=VKOH×Eq.wtKOH×NKOH1000 mL…

Q: If 9 grams of polymer A with molecular weight of 30,000 Dalton is mixed with 5 grams of polymer B…

A: The calculations are done by the following formulas .where: m= mass of the polymer N=number of the…

Q: 5. What is number average and weight average molecular weight give equations with molecular weight…

A: Answer - Number-average - number average and weight average molecular weight is that the number…

Q: (P.Ç.1.2) Calculate the polydispersity index of a polymer than consisting of following molecular…

Q: Br CuBr/PMDETA Δ For the atom transfer radical polymerization of the following monomer, i.) provide…

A: (i) We have to draw the structure of a 2-mer with an active chain end in the dormant form.

Q: d) Recycling of polymer films is a major challenge due to structure. Would a LLDPE film made from a…

A: LLDPE film made from a conventional Ziegler-Natta catalyst or one made from a metallocene catalyst…

Q: Write the significance of poly dispersity index; also calculate the number-average molecular weight,…

A: There some small molecules while some are very long molecules, having a molecular weight in…

Q: Calculate the number-average degree of polymerization of an equimolar mixture of adipic acid and…

A: The degree of polymerization (Xn) or (DP) is defined as the number of monomer units in the polymer…

Q: If linear siloxane polymers are required, dimethyldichlorosilane with a high purity is necessary,…

A: A polymer is a substance or material made up of very large molecules, known as macromolecules, that…

Q: Calculate the maximum average degree of polymerisation in linear polyester synthesis if the initial…

A: Maximum average degree of polymerization = 399

Q: Introduction of vinyl polymer production using the bulk method.

A: This is a method of polymerization. This method involves radical mechanism. It is a three step…

Q: 5. The purpose of SDS in SDS-PAGE is (a) to selectively bind the target protein. (b) to maintain…

A: SDS (sodium dodecyl sulphate) is an anionic detergent. SDS facilitates protein bifurcation. It…

Q: Why do you think initiator molecule is needed to induce the polymerization of ethylene

Q: 7. What is the Mw/Mn value for a free radical polymerization if the termination is mainly by…

A: The process of formation of large molecule that is polymer from small repeating units (known as…

Q: • What do you mean by auto-acceleration? • List down the factors that affect the cationic…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: a) Give an example of an old Ziegler-Natta catalyst and indicate two disadvantages compared to the…

A: A. These catalysts were originated in the 1950s by the German chemist Karl Ziegler for the…

Q: You are asked to manufacture 100 kg of polyester with a number-average molecular weight of 2000 by…

A: Polymerization is a chemical reaction in which the chemical compound of lower molecular link…

Q: The following table lists molecular weight data for a polypropylene material. compute the following.…

A: The table for the calculation of number average molecular weight is given below.

Q: Polyethylene glycol, or Carbowax®, is widely used as a binder, thickening agent, and packaging…

A: Polyethylene glycol (PEG) is a polyethylene resin derived from petroleum for many uses, from…

Q: A sample of phthalic anhydride which contains 5% (w/w) phthalic acid as impurity, is to be…

A: Phthalic anhydride is the organic compound with the formula :-C6H4(CO)2O. It is the anhydride of…

Q: Define the Mechanism - Cationic Polymerization of CH2=CHZ ?

A: Cationic polymerization is a type of chain growth polymerization reaction. It involves the transfer…

Q: you are using MMA with two initiators N,N-Diisopropylethylamine and Ethyl α-bromoisobutyrate to…

Q: When the polymer that adsorbs onto the particle’s is added in a quantity that is less than…

A: Solution of your question is given below - Vander vall interaction is a group of interaction froces…

Q: Explain the Mechanism - Radical Polymerization of CH2=CHPh

A: Polystyrene is a vinyl polymer having lots of application. Free radical polymerization, using…

Q: Describe the polymerization of 2,2-dimethyloxirane by a. an anionic mechanism. b. a cationic…

Q: 2. The anionic polymerization of styrene was performed using a 1.38 mol/L solution of styrene in…

Concept explainers

Polymerization Kinetics

Polymerization is a chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that diverge in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes. Polymerization is generally classified into step-growth and chain polymerization. Polymers are categorized into linear polymer and cross-linked polymers that are produced either by condensation or additional polymerization.

Question

By measuring molecular weight as a function of monomer conversion, describe how you
can tell whether the polymerization of an unknown monomer was proceeding by a stepgrowth or chain-growth mechanism.

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

What species, in addition to a dead polymer, is produced in a chain-transfer reaction with a macrocarbocation in cationic chain polymerization?
What is the fraction of monomers (p) that have been used in a stepwise polymerisation reaction if the reaction solution started with a monomer concentration of 1.58 mol L-1 and now has a concentration of 0.231 mol L-1?
8. When an equilibrium step-growth polymerization is 99% complete, what fraction of the reaction mixture is still monomer (a) on mole basis and (b) on weight basis ?
The mechanism given for cationic polymerization of isobutylene shows that all the monomer molecules add with the same orientation, giving a polymerwith methyl groups on alternate carbon atoms of the chain. Explain why no isobutylene molecules add with the opposite orientation.
Show the differences between the chain-growth and step-growth mechanisms of polymerization.
Discuss the suitable initiator to start an addition polymerization. Define what is auto-acceleration, what causes this effect and how to minimize this effect. Briefly discuss emulsion and suspension polymerization techniques.
Define the Mechanism - Cationic Polymerization of CH2=CHZ ?
Q5. Give one condition for the denaturation step employed in blotting Q6. Give the main two compounds responsible for the formation of the gels Q7. The addition of which two reagents are also necessary to initiate the polymerization (gel formation)
Draw the mechanism for ziegler-natta-catalyzed polymerization of a subdtitude ethylene.
A characteristic of the stoichiometry of condensation (step-growth) polymerization reactions is that small molecules, like H2O, HCl or others, are released as reaction by-products. In a commercial polymerization reactor, what might be some process implications of the release of small molecules like H2O or HCl?
With reference to the polymerisation mechanisms explain why the polydispersities of the two samples are so different.
1.Discuss the suitable initiator to start an addition polymerization. 2.Define what is auto-acceleration, what causes this effect and how to minimize this effect. 3.Briefly discuss emulsion and suspension polymerization techniques.