1 Aging and Hail Research of PVC Membranes Frank J. Foley, Jim ...

To enhance the dramatic difference in performance, compare the individual sample datafor group B (Table 11) and group D (Table 12) along with the hail simulation results.Impact testing is the seminal event uncovering the physical deterioration of anembrittled membrane and placing an owner at significant risk.SampleNo.State( A ) ( B ) ( C ) ( D ) ( D/B ) ( D/A )UV- Hidden Flap ExposedPlasticizer% %Factored Plasticizer MembraneLoss byLost ChangeAge of Roof Content, % Content, %UV YearFailure Point,Size inInches1 TX 6.21 26.8 20.6 6.2 23.13 0.998 1.002 AZ 8.84 29.1 26.1 3.0 10.31 0.339 1.003 TX 7.91 28.8 21.8 7.0 24.31 0.885 1.004 TX 7.21 27.2 22.9 4.3 15.81 0.596 1.005 TX 6.81 29.1 25.3 3.8 13.06 0.558 1.006 SC 6.58 29.2 23.7 5.5 18.84 0.836 1.007 LA 5.91 28.2 21.8 6.4 22.70 1.083 1.008 TX 5.91 27.7 22.6 5.1 18.41 0.863 1.509 KS 5.82 31.4 29.5 1.9 6.05 0.326 1.0010 TX 5.61 28.6 22.4 6.2 21.68 1.105 1.0011 LA 4.81 27.9 22.0 5.9 21.15 1.227 1.0012 TX 4.51 26.2 23.2 3.0 11.45 0.665 1.0013 TX 4.01 24.1 20.0 4.1 17.01 1.022 1.0014 ID 3.39 26.5 25.6 0.9 3.40 0.265 2.5015 MN 2.70 27.0 26.3 0.7 2.59 0.259 2.5016 IA 2.51 26.1 22.5 3.6 13.79 1.434 1.0017 MN 2.36 25.9 24.0 1.9 7.34 0.805 3.0018 TX 2.30 25.2 19.6 5.6 22.22 2.435 1.0019 CO 2.30 26.2 25.1 1.1 4.20 0.478 2.5020 MN 2.19 26.5 24.4 2.1 7.92 0.959 2.5021 IL 1.69 25.8 24.9 0.9 3.49 0.533 2.50Mean Summaries: 4.74 27.3 23.5 3.8 13.81% 0.802Table 11: Group B test results-- plasticizer loss and impact simulation (all samples)19