Problem 4 (total points: 5) Consider a situation shown in the figure. You have a

Question

Problem 4 (total points: 5) Consider a situation shown in the figure. You have a mixture of two polymers with equal numbers of segments (both segments are of the same size) that is in the miscible region of the (UCST) phase diagram. You want to change the state of the system from being miscible to becoming immiscible. You cannot change the composition of the mixture, pressure, you are not allowed to add any other chemical moiety to or remove anything from the system. All you can do is to either vary temperature or change molecular weight. How can you accomplish this and why? (Assume that the system behavior is well described by the Flory-T Huggins theory). Use equations if you can to prove your point. You are here Composition

Explanation / Answer

In above diagram temperature will affect the immiscibility as temperature decreases the immisibility will increase.

By increase in molecular weight also you can decrease the immiscibility .

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