Abstract / Description of output
We report the formation of an ionomeric network in a poly(L,D-lactide) hybrid nanocomposite, (PLDLAHYB) during in-situ melt polymerization of L,D-lactide in the presence of magnesium/aluminum layered double-hydroxide (LDH) without added catalyst. The effect of LDH mass loading and reaction time on molecular mass and yield of soluble poly(L,D-lactide) (PLDLA-SOL) present in the hybrid was investigated for a better understanding of the conflicting roles of LDH in polymerization and degradation of PLDLA-SOL. High molecular mass PLDLA-SOL is obtained through initiation of polymerization by LDH. However an additional insoluble organiceinorganic fraction, INSOL, is also observed within the product when PLDLA-SOL is extracted using methylene chloride as solvent. It is proposed that INSOL is an ionomeric network comprising hydrogen-bonded, or otherwise coordinated, lactic acid monomer salts of magnesium, together with PLDLA in a 24%e76% mass ratio.
Keywords / Materials (for Non-textual outputs)
- polylactic acid
- LACTIDE POLYMERIZATION
- ring opening polymerisation
- layered double hydroxide
- network formation