Microstructure effects on the rheology of nanoclay‐filled PHB/LDPE blends

Abstract

The rheological and morphological properties of the nanoclay-filled LDPE/PHB blends using LDPE-g-MAH as compatibilizer were determined. SEM data showed that the morphology was more sensitive to organoclay incorporation, compared to inclusion of the compatibilizer. Moreover, the results of image analysis and rheological studies indicated that nanoclay was located in the PHB phase after migrating from the LDPE phase, due to the thermodynamic and viscosity effects. The data obtained also showed that the stabilization mechanisms of PHB and LDPE matrix nanocomposites is due to coalescence prevention (due to the physical barrier) and alteration in the viscosity ratio of the phases, respectively. The obvious, pseudo-solid-like behavior over a wide range of frequencies in the PHB/LDPE/nanoclay systems demonstrated that the strong interaction between PHB/LDPE and nanoclay restricted the relaxation process of polymer chains. Therefore, PHB/LDPE/nanoclay was associated with a greater melt strength, which is essential for its favorable processability and applications. POLYM. COM-POS., 40:4125-4134, 2019.

Study of the Viscosity and Thermal Characteristics of Polyolefins/Solvent Mixtures: Applications for Plastic Pyrolysis

“…However, blending polymers with a suitable solvent would be a better solution for transferring the melted plastic waste to the reactor in pyrolysis since most of the solvents increase the mass and heat transfer rates in addition to reducing viscosity. Moreover, thermal degradation in a solution may prove to be a benefit because it facilitates the generation of more specific products due to the fact that some solvents could modify the plastic degradation mechanism …”

“…Moreover, thermal degradation in a solution may prove to be a benefit because it facilitates the generation of more specific products due to the fact that some solvents could modify the plastic degradation mechanism. 30 Paraffin waxes are a promising solvent for reducing the viscosity of olefin plastics for the pyrolysis process because they are inexpensive, noncorrosive, and chemically inert solvents with low vapor pressure in the melt phase and less volume change during phase changes (melting). 31−34 Influence of wax content, at a low percentage (up to 40%), on the thermal and physical properties of LLDPE and LLDPE/wax mixtures has been studied by various researchers.…”

In Service Performance of Toughened PHBV/TPU Blends Obtained by Reactive Extrusion for Injected Parts

“…In this case, a clear increase in G showed a pseudo-solid-like behavior at this frequency region. This trend is usually observed in nanoparticle filled polymers and blends due to the particle-particle interconnectivity of nanoparticles and the formation of a pseudo-network structure [56,57]. However, it is not easy to find a simple explanation for this trend in the unfilled blends.…”

Light‐colored conductive nanorod‐mediated co‐continuous polypropylene/poly(butylene succinate) blends: Regulatory mechanism, morphology evolution, electrical, and optical properties

“…12 It is essential to selectively localize nanofillers in the governance of the blends' morphology. 13 The co-continuous morphology have been mediated with a large number of nanofillers, including silica, 14,15 nanoclay, 16,17 cellulose nanocrystal, 18 and synthetic nanorods, 5,19,20 etc. Specially, Janus particles, combining the amphiphilicity of a compatibilizer and the Pickering effect of a nanoparticle, 21,22 could impact the blends' morphology through a multiple viscoelasticity mechanism.…”