POY PET fiber samples were uniaxially drawn below the glass transition temperature (Tg) at various draw ratios to obtain filaments with different transient structures. The transient structure was composed of polymeric chains with para-crystalline or mesomorphic order and played a key role on the ultimate properties of fibers. Therefore. the study of the post-treatment mesomorphic stru... https://parisnaturalfoodes.shop/product-category/brain-b-12-1000mcg/