A polymer P having number-average and weight-averagemolecular weights of 120,000 and 300,000, respectively, was cut into fractions A and B by fractional precipitation. If A and B have number-average molecular weights of 90,000 and 130,000, respectively, what are the weight fractions of A and B obtained from the initial polymer P ? If A and B have the same polydispersity, what is the polydispersity index ?
A polymer P having number-average and weight-averagemolecular weights of 120,000 and 300,000, respectively, was cut into fractions A and B by fractional precipitation. If A and B have number-average molecular weights of 90,000 and 130,000, respectively, what are the weight fractions of A and B obtained from the initial polymer P ? If A and B have the same polydispersity, what is the polydispersity index ?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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6.A polymer P having number-average and weight-averagemolecular weights of 120,000 and 300,000, respectively, was cut into fractions A and B by fractional precipitation. If A and B have number-average molecular weights of 90,000 and 130,000, respectively, what are the weight fractions of A and B obtained from the initial polymer P ? If A and B have the same polydispersity, what is the polydispersity index ?
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