Engineering 25
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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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Bruce mayer pe licensed electrical mechanical engineer bmayer chabotcollege

Engineering 25

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

Bruce Mayer, PE

Licensed Electrical & Mechanical [email protected]


Polyfit for polymers

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

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 reaction1

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

The Plots

  • Use 2X2 SubPlot


The results

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


The matlab file 1

The MATLAB File-1


The matlab file 2

The MATLAB File-2


Digital data table

Digital Data Table


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