For each of the following pairs of polymers, plot and label schematic stressstrain curves on the same graph [i.e., make separate plots for parts (a) to (c)]. (a) Polyisoprene having a number-average molecular weight of 100,000 g/mol and 10% of available sites crosslinked; polyisoprene having a numberaverage molecular weight of 100,000 g/mol and 20% of available sites crosslinked (b) Syndiotactic polypropylene having a weightaverage molecular weight of 100,000 g/mol; atactic polypropylene having a weight-average molecular weight of 75,000 g/mol (c) Branched polyethylene having a numberaverage molecular weight of 90,000 g/mol; heavily crosslinked polyethylene having a number-average molecular weight of 90,000 g/mol

ENGR 121 B Lecture Notes for 9/19/2016 Spencer Kociba Summary of Lecture: beginning to understand the vocabulary and functions in MATLAB and how we will use MATLAB and BlackBoard Learn to turn in assignments, take quizzes, etc. Goal of the course: learn to THINK like a programmer aka step by step problem solving. Problem solving techniques: ● Plan ● Restate the problem ● Divide the problem into steps or subproblems to solve ● Reduce/Simplify the problem (ex. Global scale>local scale) ● Look for similarities to other previously solved problems ○ Emotional attachment/familiarity with an idea or concept improves your memory and ability to recall information when needed ● Ex