67, 1774 (1945)]. Calculate the initial ternary copolymer composition to compare with the composition obtained by the analysis. [Reactivity ratios: S/MMA: r 0.52, r2 = 0.46; St/VC:r = 1.8, 2 = 0.087; MMA/VC: = 2.4, r2 = 0.36.] %3D %3D %3D

Introduction to Chemical Engineering Thermodynamics
8th Edition
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Question
7.12 The ternary copolymerization of a monomer mixture containing 31.24, 31.12, and
37.64 mol% of styrene(St), methyl methacrylate(MMA), and vinylidene chloride(VC)
at 60°C for 16 h yielded at 18.2 wt% conversion a polymeric product which analyzed
C 68.66% and C? 12.07% (by wt) [C. Walling and E. R. Briggs, J. Am. Chem. Soc.,
67, 1774 (1945)]. Calculate the initial ternary copolymer composition to compare
with the composition obtained by the analysis. [Reactivity ratios: St/MMA: r =
0.52, r2 0.46; St/VC:r = 1.8, r2 = 0.087; MMA/VC: r = 2.4, r2 = 0.36.]
%3D
%3D
%3D
Ans.
Terpolymer composition (mol%)
Calcd. [Eq. (7.65)]
Feed
Calcd. [Eq. (7.66)]
Mol%
31.24
Monomer
Found
St
43.4
44.3
44.3
MMA
31.12
39.4
41.2
42.7
VC
37.64
17.2
14.5
13.0
Transcribed Image Text:7.12 The ternary copolymerization of a monomer mixture containing 31.24, 31.12, and 37.64 mol% of styrene(St), methyl methacrylate(MMA), and vinylidene chloride(VC) at 60°C for 16 h yielded at 18.2 wt% conversion a polymeric product which analyzed C 68.66% and C? 12.07% (by wt) [C. Walling and E. R. Briggs, J. Am. Chem. Soc., 67, 1774 (1945)]. Calculate the initial ternary copolymer composition to compare with the composition obtained by the analysis. [Reactivity ratios: St/MMA: r = 0.52, r2 0.46; St/VC:r = 1.8, r2 = 0.087; MMA/VC: r = 2.4, r2 = 0.36.] %3D %3D %3D Ans. Terpolymer composition (mol%) Calcd. [Eq. (7.65)] Feed Calcd. [Eq. (7.66)] Mol% 31.24 Monomer Found St 43.4 44.3 44.3 MMA 31.12 39.4 41.2 42.7 VC 37.64 17.2 14.5 13.0
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