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← ScienceWhich outcome occurs when molecular chain branching increases in polyethylene?
A)Ultimate tensile strength decreases✓
B)Crystallinity of polymer structure increases
C)Polymer density exhibits an increase
D)The glass transition temperature declines
💡 Explanation
Increased branching interferes with chain packing because the Van der Waals forces are disrupted; this decreases tensile strength. Therefore, tensile strength decreases rather than crystallinity affecting density because of the molecular chain conformations.
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