Unique isothermal crystallization phenomenon in the ternary blends of biopolymers polylactide and poly[(butylene succinate)-co-adipate] and nano-clay

Tuning the nano/micro‐structure and properties of melt‐processed ternary composites of polypropylene/ethylene vinyl acetate blend and nanoclay: The influence of kinetic and thermodynamic parameters

“…The presence of OMMT within the EVA droplets increased their viscosity, resulting in large and difficult to break EVA droplets, which explains the observed decrease in the elasticity and viscosity for the [P80C5O4] 11 (E20) 1 and [P80C5O4] 9 (E20) 3 composites. The viscosity and elasticity of the composites increased in the order [P80C5O4] 11 (E20) 1 < [P80C5O4] 9 (E20) 3 < [P80C5O4] 6 (E20) 6 <[P80C5O4] 3 (E20) 9 . As discussed above, the level of OMMT dispersion improved for longer EVA mixing times (Figure 2).…”

“…Previous studies 32 have also shown that a better nanoclay dispersion leads to a much higher complex viscosity. This means that the exfoliated OMMT platelets in the [P80C5O4] 3 (E20) 9 composite offered a greater restriction to the polymer chain mobility than the intercalated OMMT platelets in the P80C5O4] 11 (E20) 1 , [P80C5O4] 9 (E20) 3 , and [P80C5O4] 6 (E20) 6 composites. 6 (E20) 6 > [P80C5O4] 3 (E20) 9 .…”

“…This means that the exfoliated OMMT platelets in the [P80C5O4] 3 (E20) 9 composite offered a greater restriction to the polymer chain mobility than the intercalated OMMT platelets in the P80C5O4] 11 (E20) 1 , [P80C5O4] 9 (E20) 3 , and [P80C5O4] 6 (E20) 6 composites. 6 (E20) 6 > [P80C5O4] 3 (E20) 9 . As was shown in Figure 1, for shorter EVA mixing times most OMMT particles are found within the EVA phase, with a smaller fraction at the interface.…”

“…The distribution of nanofillers in each phase of binary polymer blends can be influenced by many thermodynamic (e.g., the nature of the polymers and the nanofiller-polymer interactions) and kinetic (i.e., the operating parameters of the mixing process) factors. [4][5][6] In the present work, we investigate whether kinetic or thermodynamic factors, or a combination of both, affect the spatial distribution of the nanoclay particles in the phases of a polypropylene (PP)/ ethylene vinyl acetate (EVA) blend. The PP component in the composite is relatively cheap and easy to process, while EVA is used to impart flexibility to the PP component.…”

Morphology Evolution of Poly(L-lactic acid) (PLLA), Poly(ε-caprolactone) (PCL) and Polyethylene Oxide (PEO) Ternary Blend and Their Effects on Mechanical Properties for Bio Scaffold Applications

“…43 It seems PEO chains can be regarded as a defect during the PLLA crystallization which leads to more efficient nucleation, in the case of polymer blend diffusion of solutes, viscous flows in the melt, solid-liquid interface growth and motion, and, finally, formation of non-equilibrium crystalline defects generated within the solid phase as a crystal grows rapidly. [44][45][46] Another effect of the existence of PCL and PEO on the PLLA crystallization is the elimination of cold crystallization. The cold crystallization in PLLA is originated from the incomplete crystalline structure due to its low crystallization rate.…”