polypropylene – TechConnect Briefs

Processing of Polypropylene by Material Extrusion Additive Manufacturing

Gonzalez-Gutierrez J., Spoerk M., Holzer C., Luxembourg Institute of Science and Technology (LIST), LU

Material extrusion additive manufacturing, also known as fused deposition modeling (FDMTM) or fused filament fabrication (FFF), is one of the simplest and most economical additive manufacturing technologies. The feedstocks used in FFF are filaments, and [...]

Accelerated Neutral Atom Beam processing of medical devices enhances tissue integration while reducing bacterial attachment

Khoury J., Phok B., Kirkpatrick S., Walsh M., Shashkov D., Exogenesis Corp, US

Accelerated Neutral Atom Beam (ANAB) technology is a low energy accelerated particle beam gaining acceptance as a tool for nano-scale surface modification of implantable medical devices. ANAB is created by acceleration of 2. METHODS neutral [...]

Melt-mixed thermoplastic polymer/carbon nanotube composites for thermoelectric applications

Pötschke P., Krause B., Luo J., Leibniz Institute of Polymer Research Dresden (IPF), DE

Thermoelectric generators (TEG), which can convert waste heat directly into electricity, are one type of promising energy harvesting devices. The thermoelectric (TE) effect (also called Seebeck effect) describes an electrical potential (voltage ∆U) induced by [...]

Development of the Electro-Friction Effect in the Semiconductor Particles / Thermoplastic Resin Composite Film

Fuwa T., Su H., Yanaka R., Takase R., Kobayashi K., Kawai T., Sakurai K., Anzai H., Kuroda S., Gunma University, JP

Electro-Rheological (ER) fluid is the suspension of polarizable particles in an insulating solvent and has the characteristic that the apparent viscoelasticity changes when an electric field is applied from the outside. This phenomenon is caused [...]

Flame retardant Polypropylene nanocomposites: Catalytic and synergistic effects between maleic anhydride grafted Polypropylene and cobalt nanoparticles

He Q., Lamar University, US

A novel function of polypropylene grafted with maleic anhydride (PP-g-MA) as synergistic additive to eﬀectively reduce the flammability of polypropylene (PP) nanocomposites (PNCs)reinforced with in situ synthesized cobalt (Co)–cobalt oxide core–shell nanoparticles (NPs) was reported.

Structure and Electrical Properties of Polypropylene-Graphite-Carbon black/ Nanotubes Hybrid Conducting Composites

Ramanujam B.T.S., Mehta H., Khare A., Radhakrishnan S., Maharashtra Institute of Technology, IN

Low cost conducting composites are required for bipolar plates of fel cells and battery electrodes. Polypropylene filled with graphite has been tried in the past but acceptable level of conductivity is reached only at high [...]

Structure and Electrical Properties of Polypropylene-Graphite-Carbon black/ Nanotubes Hybrid Conducting Composites

Ramanujam B.T.S., Mehta H., Khare A., Radhakrishnan S., Maharashtra Institute of Technology, IN

Low cost conducting composites are required for bipolar plates of fel cells and battery electrodes. Polypropylene filled with graphite has been tried in the past but acceptable level of conductivity is reached only at high [...]

Novel Green Polymer Composites: Major Enhancements in the Crystallization Kinetics of Poly(lactic acid) and Mechanical Properties of Polypropylene Created via Solid-State Shear Pulverization

Brunner P.J., Torkelson J.M., Kane N., Northwestern University, US

Hybrids of polylactide (PLA) or polypropylene (PP) with microcrystalline cellulose (MCC) were created using a continuous, industrially scalable, and environmentally benign process called solid-state shear pulverization (SSSP). The PLA composite was subsequently melt-processed (MP) with [...]

Novel Green Polymer Composites: Major Enhancements in the Crystallization Kinetics of Poly(lactic acid) and Mechanical Properties of Polypropylene Created via Solid-State Shear Pulverization

Brunner P.J., Torkelson J.M., Kane N., Northwestern University, US

Hybrids of polylactide (PLA) or polypropylene (PP) with microcrystalline cellulose (MCC) were created using a continuous, industrially scalable, and environmentally benign process called solid-state shear pulverization (SSSP). The PLA composite was subsequently melt-processed (MP) with [...]

Overcoming the Achilles’ Heel of Processing of Polymer Nanocomposites: Achieving Well-Dispersed Polymer-Graphite, Polymer-Carbon Nanotube, and Polymer-Graphene Nanocomposites with Major Property Enhancements by Solid-State Shear Pulverization

Torkelson J.M., Brunner P.J., Kane N., Northwestern University, US

Polymer nanocomposites, particularly with carbon-based nanofiller, hold promise for large-scale, commercial application of novel materials with enhanced, tunable properties. Unfortunately, a stumbling block in achieving this goal on a commercial scale is the remarkable difficulty [...]