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Freeze-drying improves crystallization of biodegradable polymers

from SPE Plastics Research Online

Poly(l-lactide) (PLLA) is one of the most common biodegradable polymers, predominantly used in food and consumer good packaging. Unfortunately, PLLA suffers from poor crystallizability. This limits its broader use because it in turn affects, for example, polymer modulus and annealing time. Thus, practical techniques for modifying its crystallizability are needed. The addition of nucleating agents can promote PLLA crystallization, but these additives impose an environmental burden. more

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