Question

3. A sample of polystyrene is composed of a series of fractions of different-sized molecules: Fraction Weight Fraction Molecular weight A 0.04 10,000 B 0.08 20,000 C 0.16 30,000 D 0.28 40,000 E 0.20 50,000 F 0.12 60,000 G 0.07 70,000 H 0.05 80,000 Calculate the Mn, Mw, and PDI of this polymer sample. Draw a molecular weight distribution curve with molecular weight and weight fraction as X and Y dimensions, respectively.

          3. A sample of polystyrene is composed of a series of fractions of different-sized molecules:
Fraction	Weight Fraction	Molecular weight
A	0.04	10,000
B	0.08	20,000
C	0.16	30,000
D	0.28	40,000
E	0.20	50,000
F	0.12	60,000
G	0.07	70,000
H	0.05	80,000
Calculate the Mn, Mw, and PDI of this polymer sample. Draw a molecular weight distribution curve with molecular weight and weight fraction as X and Y dimensions, respectively.

$3. A sample of polystyrene is composed of a series of fractions of different-sized molecules: Fraction Weight Fraction Molecular weight A 0.04 10,000 B 0.08 20,000 C 0.16 30,000 D 0.28 40,000 E 0.20 50,000 F 0.12 60,000 G 0.07 70,000 H 0.05 80,000 Calculate the Mn, Mw, and PDI of this polymer sample. Draw a molecular weight distribution curve with molecular weight and weight fraction as X and Y dimensions, respectively.$

Added by Calvin M.

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