CHEMISTRY 4210/5210
CHEMISTRY OF POLYMERS

Problem Supplement

Chapter 3

SEC/GPC Problem

A sample of polystyrene is analyzed by gel permeation chromatography using THF as the mobile phase. Using the following data, determine M_n, M_w and the polydispersity index (MWD) for this sample.

GPC Chromatogram - Recall the curve height is proportional to the weight fraction (w_i).

MW calibration curve - Note the y-axis is logarithmic.

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