Molecular weight data for some polymer are tabulated. Determine: 6. a) The number-average molecular weight b) The weight-average molecular weight If it is known that this material's number-average degree of c) polymerization is 458, which one of the polymers listed in Table 16.3 is this polymer? d) What is the weight-average degree of polymerization for this polymer? Molecular Weight Range (g/mol) W; 8,000-20,000 0.05 0.02 20.000-32.000 0.15 0.08

Molecular weight data for some polymer are tabulated. Determine: 6. a) The number-average molecular weight b) The weight-average molecular weight If it is known that this material's number-average degree of c) polymerization is 458, which one of the polymers listed in Table 16.3 is this polymer? d) What is the weight-average degree of polymerization for this polymer? Molecular Weight Range (g/mol) W; 8,000-20,000 0.05 0.02 20.000-32.000 0.15 0.08

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...

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2) One of the most common consumer plastics is PET (polyethylene terephthalate), which is used extensively in containers for food and beverage products. Coca-Cola has recently come up with a biobased source of ethylene glycol for synthesizing this polymer, however, the terephthalic acid is still derived from petroleum sources. A sustainable source of terephthalic acid is therefore highly desired. One candidate is 2,5-furandioic acid. Draw the repeat unit for the resulting sustainable polyester derived from 2,5furandioic acid and ethylene glycol.
Polypropene results from the polymerization of H H H A. CH-c в. сн CH3 c. CHạ¢ D. CH-C E. CH- ČN Multiple Choice A
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In reference to cloth or fiber, the term acetate usually means cellulose acetate, a semisynthetic polymer made by treating cellulose with acetic anhydride. Cellulose acetate is spun into yarn by dissolving it in acetone or methylene chloride and forcing the solution through spinnerets into warm air, where the solvent evaporates. An organic chemistry student wore a long-sleeved acetate blouse to the laboratory. She was rinsing a warm separatory funnel with acetone when the pressure rose and blew out the stopper. Her right arm was drenched with acetone, but she was unconcerned because acetone is not very toxic. About ten minutes later, the right arm of the student’s blouse disintegrated into a pile of white fluff, leaving her with a ragged short sleeve and the tatters of a cuff remaining around her wrist. Explain how a substance as innocuous as acetone ruined the student’s blouse.
Terephthaloyl dichloride and p-phenylenediamine were polymerized to form a copolymer called Kevlar with M, of 250,000 g/mol. Calculate: A) the extent of reaction, P
Draw the structure(s) of the monomer(s) used to make each polymer
The plastic known as PETE (polyethyleneterephthalate) is used to make plastic soft drink bottles and containers for salad dressing, shampoos, and dishwashing liquids. PETE is a polymer of terephthalic acid and ethylene glycol. Today, PETE is the most widely recycled of all the plastics. After it is separated from other plastics, PETE can be used in polyester fabric, door mats, and tennis ball containers. In 2015, 1.84×109 lb1.84×109 lb of PETE bottles were recycled in the U.S. The density of PETE is 1.38 g/mLg/mL. How many kilograms of PETE bottles were recycled in 2015 in the U.S.? Express your answer to three significant figures.
Draw the monomer(s) used to make the following polymers (end - groups have not been included). If more than one monomer is used, provide both structures. [8 pts] a. This polymer b. This other polymer c. Still another polymer
5. How much BPO would be needed to polymerize 2.5 g of styrene to a target molecular weight of 150,000 g/mol? 2.5 g ? g BPO n y MW = 150,000
a. What is more? Activity 3: "Take this Challengel" Directions: Complete the given table by supplying the needed information and answer the questions that follow. Name of Polymer Polymer Examples or Monomer Monomer Structure Uses Structure Polyethylene Polytetrafluoroethylene (Teflon) Polyvinylchloride (PVC) Polystyrene Polypropene (or polypropylene) Polymer polyethylene terephthalate
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