6.5 An amorphous emulsion copolymer consisting of 62 wt% methyl methacrylate (homopolymer Tg = 105 °C) and 38 wt% ethyl acrylate (homopolymer Tg = -23 °C) has been proposed as the basis of a latex paint formulation. A latex consists of tiny (≈ 1-10 μm) polymer particles suspended in water. After application of the paint, these particles must coalesce to form a film upon evaporation of water. a. Explain the similarity and difference between an emulsion and a suspension. b. What value of Tg would you predict for this random copolymer? Would the copolymer be suitable for an outdoor paint?

6.5 An amorphous emulsion copolymer consisting of 62 wt% methyl methacrylate (homopolymer Tg = 105 °C) and 38 wt% ethyl acrylate (homopolymer Tg = -23 °C) has been proposed as the basis of a latex paint formulation. A latex consists of tiny (≈ 1-10 μm) polymer particles suspended in water. After application of the paint, these particles must coalesce to form a film upon evaporation of water. a. Explain the similarity and difference between an emulsion and a suspension. b. What value of Tg would you predict for this random copolymer? Would the copolymer be suitable for an outdoor paint?

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

Louie performed paper chromatography to identify which among the four availablereference mixtures — WAR, OFF, YIN, MEW — have the same components as hisunknown sample, GUN. He spotted the standards and the sample in a Whatman No. 1filter paper, which he placed in a developing chamber containing 3% KCl. After 20minutes, Louie obtained the chromatogram below, immediately noting that the distancetravelled by the solvent from the origin is 79.0 mm. On the other hand, the distances (incm) traveled by the developed spots were tabulated as follows.(see attached) Questions: 1. Is the type of paper chromatography performed normal or reversed? Why?2. Calculate the Rf of the spots from the samples. Report your answers in four decimal places.
A small piece of Fe-0.4 wt%C alloy is held at 728 °C for 1 hour and then quenched. On microstructure analysis the microstructure had some level of martensite in it. Estimate the weight fraction of martensite to 2 d.p. Answer:
Earth, a CHEM 40.1 student, extracted a mixture of pigments from the roots of Rubiatinctorum, commonly known as rose madder. Earth spotted the root extract on twohydrophobic silica gel plates. He then placed each plate in separate developing chambers,one containing solvent system WHITE and the other housing solvent system MIX. Earthallowed the chromatograms to develop for around five minutes. Afterwards, he removedthe plates from the containers and placed them inside an iodine chamber. Thechromatograms resulting from the TLC experiment after visualization are illustrated asfollows. The distances travelled by each spot and by the solvents were measured andrecorded in the displayed table.
(1) Fill in the table with the missing properties for H20 T (°C) P (kPa) v (m'/kg) 0.001080 State description Saturated liquid 90 0.86 175 Saturated vapor 300 0.15 110 2000 9000 700 515 0.18 310 150 0.001043 35 25.205
Bb BEAKERS AND GRADUATED X W M w Chemistry Library Assignme X Inbox (14)-daniella.conesa x Courses xb Home | bartleby X -prod-fleet02-xythos.content.blackboardcdn.com/5c1754ad402d4/31117291?X-Blackboard-Expiration=1653004800000&X-Blackboard-Signature=ROEzWz%2BUL8fax.... News V Official Miami Da... Blackboard Launchpad MyMathLab A ALEKS Microsoft Office H... Class General Che... O CYLINDERS 11/13 | - 1 110% + » C. Beakers Data Table: Basic Laboratory Techniques (Dry Lab) A. Meter Sticks Volume Read (ml) Point 110 120 Distance (cm) Distance (mm) am A 4 6 67 B A 4 A 0 C 1 ? Tic 3.00 2.00 3.00 6 18 1 128 7 9 10 1 120 22.0 11 6 Ild [20 cm D B. Graduated Cylinders 10.00ml 10.00ml 25.0ml 1000ml mm 21.0 10 9 am 86.0 1 1 85.C 2a 1B 2B 1C 2C 1d 2d Cylinder A B C D B Volume 99+ 50 mL +5% 250 mL +5% 400 mL +5% 250 ml 50 400 IE D. Burette Burettes read from top to bottom 100ml +0.01 25.0m 0.01 16.0 500ml 0.01 36.0 21.0 2 16.0 220 35.0 E. Thermometer AJ 20.00 N Beaker 50 mL 250 mL 400 mL Burette A B…
Compute the mass fractions of liquid in the following refractory materials at 1600°C (2910°F): (a) 4 wt% Al2O3-96 wt% SiO2 WL = (b) 11 wt% Al2O3-89 wt% SiO2 W₁ = (c) 59 wt% Al2O3-41 wt% SiO2 WL = (d) 89 wt% Al2O3-11 wt% SiO2 WL =
Given the following data forMass of test tube, beaker and cyclohexane = 100.17 gMass of test tube and beaker = 84.07 gFreezing point of cyclohexane = 6.59 oCMass of weighing paper + naphthalene =1.080 gMass of weighing paper = 0.928 gFreezing point solution = 5.11oCKf = 20.8oC/mDetermine the followinga. mass of cyclohexane in g (2 decimal places); _____b. mass of naphthalene in g (4 decimal places); _____c. freezing point depression (2 decimal places); _____d. molality of solution (3 significant figures); _____e. moles of naphthalene (3 significant figures); _____f. molar mass of naphthalene, experimentally (3 significant figures); _____g. % error if theoretical molar mass of naphthalene is 128.17 g/ mole, USE ABSOLUTE VALUE (3 significant figure); ____
An open tubular column with a diameter of 215 um and a stationary phase thickness on the inner wall of 0.51 um passes unretained solute through in 79 s. A particular solute has a retetion time of 467 s. What is the distribution constant for this solute? Kp = What fraction of time does this solute spend in the stationary phase? ts !! ttotal
4.21. A dilute aqueous solution of H SO, (Solution A) is to be mixed with a solution containing 90.0 wt% H2SO, (Solution B) to produce a 75.0 wt% solution (Solution C). Solution A Flowmeter A Analyzer Solution C 75% H,S0, Solution B 90% H,SO. Flowmeter B MIXER The flow rate and concentration of Solution A change periodically, so that it is necessary to adjust the flow rate of Solution B to keep the product H,SO, concentration constant. Flowmeters A and B have linear calibration plots of mass flow rate (in) versus meter reading (R), which pass through the following points: Flowmeter A: mA 150 lb/h, RA 25 %3D %3D 500 lbm/h, RA 70 %3D %3D Flowmeter B: mp = 200 lbm/h, Ry = 20 800 lbm/h, Rg 60 %3D The analyzer calibration is a straight line on a semilog plot of %H;SO4(x) on a logarithmic scale versus meter reading (R,) on a linear scale. The line passes through the points (x and (x (a) Calculate the flow rate of Solution B needed to process 300 lb/h of 55% H,SO, (Solution A), and the…
H.W:-) النانول %3D Calculate the Formal and Molar concentrations of the constituents in 2.30 g of ethanol (g. fw 46.1) in 3.50 litres of aqueous solútion. (4) Molal concentration (Molality) m The solution concentration produce from dissolved solute (mole) in solvent (kg), molalit- does not change with temperature and used for physicochemical measurements. fuom mixing 4 g NaOH wi
+ + HN in ethyl acetate (organic) treat with aqueous HCI Aqueous layer Organic layer treat with treat with aqueous NaOH; aqueous NaOH collect precipitate by filtration aqueous organic Final product #1 treat with "dry" with MgSO4, filter, evaporate ethyl acetate aqueous HCl; Be sure to label all glass containers of colorless solutions... collect precipitate by filtration It's easy to lose track! Final product #2 Final product #3
Give the chemical reaction in standardizing Potassium dichromate using standardized Sodium thiosulfate. 0.1 N Potassium Dichromate Solution Preparation of o.1 N Potassium dichromate (K2Cr207) Solution > Transfer 6 g of potassium dichromate (K2Cr207) to a platinum dish and dry at 120°C for 4 h. Cool in a desiccator. > Place 4.9 g of the dried K2Cr207 in a 1-L volumetric flask, and > Add 100 mL of water. Swirl to dissolve and when solution is complete, dilute to the mark with water and mix. > Store the solution in a glass-stoppered bottle. Standardization of 0.1 N Potassium dichromate (K2Cr207) Solution > Place 40 ml of water in a 250-mL glass-stoppered conical flask. and > Add 40 mL, accurately measured, of the K2Cr207 solution. Stopper the flask, swirl to mix, remove the stopper, and > Add 3 g of potassium iodide (KI), 2 g of sodium bicarbonate (NaHCO3), and 5 mL of hydrochloric acid (HCI). > Stopper the flask quickly, swirl to ensure mixing, and let stand in the dark for 10 min. >…