Novel chiral-driven stereoisomerism dimension of fire safety and crystallization mechanisms in poly(lactic acid)

(+) configuration most effectively suppresses combustion catalysis. Despite identical molecular compositions, the enantiomers induce divergent crystallization kinetics, generate stereochemical distinct carbonaceous residues, and promote differentiated gas-phase degradation channels during combustion. These results establish chirality as a previously unrecognized parameter for catalytic regulation of polymer pyrolysis and combustion, providing a molecular framework for stereochemical control of combustion behavior.