Bruce Mayer, PE Licensed Electrical & Mechanical Engineer [email protected]

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Engineering 25. Tutorial: PolyFit 1 st ,2 nd , 3 rd , 4 th. Bruce Mayer, PE Licensed Electrical & Mechanical Engineer [email protected] PolyFit for PolyMers. In ENGR45 you will learn that the production of PolyMers (Plastics) requires Chemical Reactions The polymer rcns maybe

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Engineering 25

Tutorial:PolyFit1st,2nd, 3rd, 4th

Bruce Mayer, PE

Licensed Electrical & Mechanical [email protected]

PolyFit for PolyMers
• In ENGR45 you will learn that the production of PolyMers (Plastics) requires Chemical Reactions
• The polymer rcns maybe
• Single ReAgent
• Multiple ReAgent
MultiReagent Reaction
• The Curing Time, t, for a Batch of certain Polymer varies the amount of Reagent, R, as shown in the Data-Table (T-Table) Below
• For this Data SetFind
• 1st thru 4th degreepolynomials thatbest fit the data
• Determine theall the polynomial’s goodness of fit byfinding J, S, and r2
MultiReagent Reaction
• Plot Each polynomialand the actual Dataon the Same Graph
• Use the Low-r2polynomials to estimate the Amountof ReAgent that willMinimize the CuringTime
The Plots
• Use 2X2 SubPlot
The Results

The J values for polynomial degrees 1-4:

1.0e+05 *

2.1442 0.0676 0.0647 0.0621

The S value for this data set:

2.2477e+05

The r-sqd values for polynomial degrees 1-4:

0.0461 0.9699 0.9712 0.9724

The Best r-sqd value is for degree =

4

The amount of R (in kg) for minimum cure-time

4.8400

The minimum cure-time in seconds

897.5275