02092nas a2200181   4500008004100000245013800041210006900179260000800248300001200256490000800268520138400276100002201660700002501682700002001707700002501727700002801752856013001780       2017                        eng d00aInvestigation of the biocompatibility and cytotoxicity associated with ROP initiator and its role in bulk polymerization of L-lactide0 aInvestigation of the biocompatibility and cytotoxicity associate  cFEB  a244-2510 v1113 aPoly (L-lactide) (PLLA) is one of the most attractive polymers for use in biomedical applications. In such applications it is necessary to reduce the use of toxic chemicals and catalysts used in PLLA synthesis, to minimize any adverse effects. In view of this, we have performed ring opening polymerization (ROP) of Llactide (LA) using biocompatible initiator, namely, Zinc L-Proline (ZnP) in bulk. High molecular weight PLLA (Mw up to 1.45 x 10(5) Da) was obtained using the ZnP complex. The ZnP complex is safe, easy to prepare, store and handle. H-1 and C-13 NMR spectra of PLLA were used to determine the extent of monomer conversion and stereo sequence respectively. Differential Scanning Calorimetry (DSC) and Size Exclusion Chromatography (SEC) were used to determine thermal properties, Mn, Mw and polydispersity index respectively. The mechanism of ROP of LA in the presence of ZnP was studied using Density Functional Theory (DFf) which was in good agreement with results from H-1 NMR and Matrix-Assisted Laser Desorption/Ionization Spectrometry (MALDI-TOF). Biocompatibility/non toxicity of PLLA prepared using ZnP was studied in-vitro using MTT assay by examining the proliferation rate of mouse myoblast C2C12 cell line. Escherichia coli and Staphylococcus aureus were used for the study of antibacterial activity of PLLA. (C) 2017 Elsevier Ltd. All rights reserved.1 aParwe, Sharad, P.1 aWarkad, Shrikant, D.1 aMane, Manoj, V.1 aShedage, Pranita, S.1 aGarnaik, Baijayantimala  uhttps://library.ncl.res.in/content/investigation-biocompatibility-and-cytotoxicity-associated-rop-initiator-and-its-role-bulk