PLLA ([M.sub.n] = 43,800 g/mol, [M.sub.w] = 60,700 g/mol, PDI, which could be defined as Mw/Mn = 1.388) and
PDLA ([M.sub.n] = 59,800 g/ mol, [M.sub.w] = 88,900 g/mol, PDI = 1.487) were synthesized by bulk ring-opening polymerization (ROP) using 1-dodecanol, and stannous octoate [Sn[(Oct).sub.2]] was used as an initiator and catalyst.
It assumes that extensive e-health services authorize patients to partially participate in the process of health care activities (
PDLA, SLA, MA).
While certain tin and aluminum complexes have been shown to selectively form PLLA over
PDLA, they have their drawbacks.
PLLA and
PDLA were prepared from L- and D-Lactide, respectively.
PLA turi tris stereoizomerus: poli-(L-pieno rugstis) (PLLA), poli-(D-pieno rugstis) (
PDLA) ir poli-(D, L-pieno rugstis) (PDLLA).
A 50:50 blend can form a stereocomplex, which is a complex between PLLA and poly(D-lactic acid) (
PDLA).
In another work, Zong and coworkers [53] used an electrospinning method to fabricate bioabsorbable amorphous poly (D, L-lactic acid) (
PDLA) and semi-crystalline poly (L-lactic acid) (PLLA) nanofiber non-woven membranes for biomedical applications.
Copolymers of PHB and polyhydroxyvalerate (PHV), resulting in poly(3-hydroxybutyrate-3-hydroxyvalerate) (PHBV), have a decreased [T.sub.m] and [T.sub.g] compared to pure PHB [21], The [T.sub.m], [T.sub.g] and crystallization of stereoblock and stereocomplex PLA (PLLA and
PDLA) are much better than the ones of pure PLA.
Corbion's portfolio for the Americas includes a range of high-heat, high-performance, crosslinked PLA homopolymers--PLLA &
PDLA, which are specifically targeted for applications requiring durability and/or high heat resistance in injection molding, film and sheet extrusion, thermoforming, and fiber spinning.
Given that additions of PLA's "D" stereoisomer (
PDLA) appear to create nucleation sites for PLLA crystallization, the authors studied the crystallization kinetics of blending low-molecular-weight
PDLA with common commercial PLLA, in samples containing up to 25%
PDLA.
