Gel-time and viscosity changes of a polymer were given below. What is the relation between the temperature values according to the gelling time?got,-TreeATL-TZT3>T4BT3>T2>TL>T4TZTL>T3>T4T4>T3>T2>T1

Answered: Gel-time and viscosity changes of a…

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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Gel-time and viscosity changes of a polymer were given below. What is the relation between the temperature values according to the gelling time?
got,
-Tree
A
TL-TZT3>T4
B
T3>T2>TL>T4
TZTL>T3>T4
T4>T3>T2>T1

Expert Solution

Step 1

Gelling time is time taken by the polymer to increase the viscosity to high value such that polymer is no longer workable. Once the gelling time is attained, it can be said that most of the polymer chains are cross-linked.

When the temperature of the polymer is increased, the rate of crosslinking that takes place is higher. Therefore, the gelling time will be less at higher temperatures.

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