Poly(L-lacticacid)s(PLLAx) were synthesized fromL-lactic acid by polycondensation.Different
stereocomplexes were also obtained with equimolar mixtures of synthesized PLLAx and acommercial
PDLA.The stereocomplexes were crosslinked with triallyl isocyanurate (TAIC) by gamma irradiation.
Crosslinking density increased with radiation doses,the heavier the crosslinking network, the lower its
swelling degree.The crosslinking structures were introduced in the stereocomplexes inhibiting the
mobility for crystallization of PLLA molecules.Thermal and mechanical properties of PLA stereocom-
plexes were remarkably enhanced by radiation induced crosslinking.PLA stereocomplex does not seem
to be degraded by PLLA degrading microorganisms existing in compost at room temperature,butthe
synthesized PLLA was significantly degraded.