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?

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter7: Extraction

Section: Chapter Questions

Problem 1Q

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Tirofiban (C22H36N2O5S MWt = 440.6) is present as tirofiban HCI monohydrate (C22H36N2O5S.HCI.H₂O MWt=495.1) at 0.281 mg/mL in a concentrated solution. A solution for infusion is prepared by extracting 50 mL from a 250 mL bag of 5% glucose solution and adding 50 mL of concentrated solution. Sofia who weighs weighs 87 kg requires a tirofiban dose of 0.1 mcg/kg/min for 12 to 24 hours. What would the infusion rate be (mL/h)? (Answer to 1 decimal place.) Answer: 125.28 X
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A solute with a partition coeffcient (K-[S)s/S]h) of 5 is extracted from 20 mL of phase 1 into phase 2. What volume of phase 2 is needed to extract 90% of the solute in one extraction? ( (a) 0.44 mL (b) 12 ml (c) 36 ml. (d) 72 ml
Tirofiban (C22H36N2O5S MWt = 440.6) is present as tirofiban HCI monohydrate MWt=495.1) at 0.281 mg/mL in a concentrated solution. (C22H36N2O5S.HCI.H₂O A solution for infusion is prepared by extracting 50 mL from a 250 mL bag of 5% glucose solution and adding 50 mL of concentrated solution. Sonya who weighs weighs 60 kg requires a tirofiban dose of 0.4 mcg/kg/min for 30 minutes. What volume would remain after 30 minutes? Answer: 94.53 mL X The correct answer is: 236 mL
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