PLA Nanocomposite Foams

In another paper by Sinha Ray et al. [128] foam processing of plain PLA and PLACNs (PLA/MMT) was conducted by a physical foaming method, i.e., batch process. The samples were first saturated with CO2 at 140 C and 10 MPa, Sanples were then kept under these conditions for 2 h. Subsequently, the CO2 was quickly released from the autoclave (within 1 s). After removing the C02-saturated plain 

To summarize, die beneficial effect of nanometric fillers in thermoplastic foaming can be ascribed to [130] (1) the enhancement of the strength of the polymer melt to prevent melt fiacture and foam collapse during bubble growth (2) the enhancement of the crystallization kinetics to facilitate foam setting immediately after the growth and (3) the induction of the formation of munerous bubbles. 

---