How does resin molecular weight distribution affect weatherability of flower boxes?

The weatherability of flower boxes made from resin is significantly influenced by the molecular weight distribution (MWD) of the polymer. Resins with a broad MWD often exhibit better mechanical properties and stress resistance, which can enhance durability under outdoor conditions. However, a high polydispersity index (PDI) may lead to uneven degradation, as lower molecular weight chains degrade faster under UV exposure and moisture. Conversely, a narrow MWD provides more uniform properties but may lack the toughness needed for long-term outdoor use. Optimizing the balance between high and low molecular weight fractions is key to improving weatherability, ensuring flower boxes resist cracking, fading, and brittleness over time. Factors like UV stabilizers and additives also play a role, but the foundational resin MWD determines the material's inherent resistance to environmental stress.