Polypropylene weathering data

Figure 7). The outstanding effectiveness of bis(2,2,6,6-tetra-methylpiperidinyl-4) sebacate (HALS I) in stabilizing 2 nan polypropylene plaques on outdoor weathering in Arizona can clearly be seen from the data shown in Figure 8. 

Property data for GRTP s are presented in two major breakouts. In the first breakout, the basic resins—styrene acrylonitrile (SAN), polycarbonate, polysulfone, polyacetal, polypropylene, polyphenylene oxide (PPG), nylon, modified PPG, and polyvinyl chloride—are treated as the independent variables and the physical, mechanical, electrical, thermal, chemical, and weathering characteristics are treated as the dependent variables. In the second breakout, the functional relationships are reversed, te., the properties are the independent variable and the resins are the dependent variable. ASTM test methods by which the physical values were determined are listed. The. physical data versus resins are presented in both tabular and graphic form. 

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