HW1 - 98,000 5 0.14 146,000 6 0.12 204,000 7 0.10 244,000 8...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Ch E 178: Problem Set #1 Due Friday Sept 5, 2008 1. A polymer is synthesized by the step growth polymerization. Analysis of the  product showed that it is composed of a series of fractions of molecules of  different molecular weights: Fraction No. wt. fraction M, molecular wt. 1 0.10 24,000 2 0.14 42,000 3 0.15 70,000 4 0.18
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 98,000 5 0.14 146,000 6 0.12 204,000 7 0.10 244,000 8 0.07 292,000 a) Which molecular weight fraction contains the largest number of polystyrene molecules? b) What is the Number Average Molecular Weight (Mn)? c) What is the Weight Average Molecular Weight (Mw)? d) What is the Polydispersity Index?...
View Full Document

Ask a homework question - tutors are online