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← ScienceWhich outcome results when polymer solutions exhibit shear thinning?
A)Reduced injection molding cycle times✓
B)Increased stress crack formation rate
C)Higher tensile strength in extrusions
D)Decreased weld line strength during joining
💡 Explanation
During injection molding, shear thinning reduces viscosity at high shear rates because polymer chains align via disentanglement. Therefore, the polymer flows more easily, shortening the molding cycle rather than causing mechanical weakness under stress or welding issues.
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