Addition (chain-growth) polymerization reactions often terminate by combination or disproportionation. However, there is another class of deactivation reactions, called chain transfer reactions, which are usually relevant to the final degree of polymerization (dp). How might you

Addition (chain-growth) polymerization reactions often terminate by combination or disproportionation. However, there is another class of deactivation reactions, called chain transfer reactions, which are usually relevant to the final degree of polymerization (dp). How might you

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Styrene can autoinitiate free radical polymerization and form polystyrene in the absence of an initiator. At temperatures >100 °C, radicals form due to homolysis of the T bond in the vinyl group. In the study of this reaction, researchers have found 1,2-diphenylcyclobutane in samples of heated styrene. The following mechanism for the formation of 1,2-diphenylcyclobutane has been proposed: Step 1: Homolysis of the vinyl T bond in a styrene molecule Step 2: Homolysis of the vinyl T bond in a second styrene molecule Step 3: Tail-to-tail addition of the radicals from Steps 1 and 2 Step 4: Radical coupling of the diradical formed in Step 3 (a) Use curved arrow notation to show the steps in this mechanism. (b) Are the steps in this mechanism consistent with those for free radical polymerization? (c) Why is the use of an initiator such as benzoyl peroxide more efficient in the synthesis of polystyrene than autoinitiated polymerization?
Linear and syndiotactic poly(vinyl chloride); linear and isotactic polystyrene • State whether it is possible to determine whether one polymer is more likely to crystallize than the other. • If it is possible, note which is the more likely and then cite reason(s) for your choice. • If it is not possible to decide, state why.
(a)Is this a condensation or addition polymer? Explain how you know. (b) Provide the IUPAC name of the monomer that does not contain the benzene group.
(a) Compute the repeat unit molecular weight of polybutene unit chemical formula =( C8H16) (b) Compute the number-average molecular weight for a polybutene for which the degree of polymerization is 24,000.
d) Early in the polymerization at lower conversion of the MVK monomer, the polymer chains formed are primarily linear. However, close to the end of the reaction, as most of the monomer is consumed, branched polymers may start to appear. Propose a possible rationale for the formation of branched polymer structures (hint: consider the types of termination reactions that may compete with polymerization when only little monomer is still present). 로 3 3 linear vs. branched
Like most polymerization reactions, the Fill in the blank reaction used to join two glucose molecules and form maltose also releases water.
What is Macromolecular hypothesis, what is contribution of Staudinger, Carothers, and Paul Flory to Polymer science.
312. Subject :- Chemistry
please see attached
The number-average degree of polymerization is given by n = M₂m, where mis the molecular weight of the monomeric unit. For the above sample n corresponds to the value 785. Determine which of the following polymers is present in the sample (all calculations must be shown). H I 11 Dt. Ht. CI A B D
Which of the following provides an absolute measure of the molecular weight of polymers:(a) viscometry, (b) cryometry, (c) osmometry, (d) light-scattering photometry, (e) GCP?