Polymer Shell Erosion
Polymer Shell Erosion - Related Videos
13:00
Modifying the Bank Erosion Hazard Index (BEHI) Protocol for Rapid Assessment of Streambank Erosion in Northeastern Ohio
0 Views •
Cited by 5 •
2015
Streambank erosion potential can be evaluated and ranked using David Rosgen’s Bank Erosion Hazard Index (BEHI), however this protocol has significant limitations. Here we present protocol modifications to address time constraints, allow nonprofessionals to complete accurate assessments, and account for non-alluvial stream conditions in Northeast Ohio.
02:34
Polymers
0 Views •
2020
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
08:44
Tension Tests of Polymers
0 Views •
2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Polymeric materials are widely used in civil structures, with uses ranging from very soft sealants to more rigid pipes in water and wastewater systems. The most basic definition of a polymer is a molecular structure with repeating subunits. The term polymer comes from Greek, where "poly" means many, and "-mer" means basic unit. Monomers, or single mers, are the specific repeating units. With...
08:09
Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
0 Views •
Cited by 1 •
2017
Spatial patterns of soil erosion and deposition can be inferred from differences in ground elevation mapped at appropriate time increments. Such changes in elevation are related to changes in near-surface soil carbonates. Repeatable methods for field and laboratory measurements of these quantities and data analysis methods are described here.
08:12
Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
0 Views •
2022
Here, we describe protocols for the preparation of trans-cyclobutane fused cyclooctenes (tCBCO), their polymerization to prepare depolymerizable olefinic polymers, and the depolymerization of these polymers under mild conditions. Additionally, protocols for the preparation of depolymerizable networks and compression molding of rigid linear plastics based on this system are described.
FAQs
Surface erosion removes material from the outer layer, whereas bulk erosion affects the shell throughout its structure. This distinction changes how quickly the underlying payload becomes exposed. A surface-dominated process can preserve the inner material while the exterior recedes, while erosion throughout the shell may alter internal integrity earlier and produce a different release pattern.
Water availability, reactive species, and the susceptibility of polymer bonds to cleavage directly influence erosion. Diffusion determines how deeply environmental factors penetrate, while swelling can increase structural access and dissolution can remove loosened material. Together, these processes govern mass loss and help explain why the same shell may behave differently under different biological conditions.
Erosion kinetics describe how rapidly a shell changes over time and therefore help connect material behavior with payload exposure. Predictable kinetics are important when researchers need controlled antigen presentation, immune-modulator release, or antimicrobial delivery. If erosion occurs too quickly or too slowly, the resulting stability and release profile may not match the intended biological application.
Researchers can examine how shell mass, structural integrity, and payload exposure change under the environmental conditions relevant to the intended use. Comparing these changes over time helps distinguish rapid from gradual erosion and can reveal whether surface loss, internal degradation, diffusion, swelling, or dissolution dominates. The resulting kinetics guide adjustments to stability and release expectations.
The process is useful when antigen exposure needs to be regulated rather than occur immediately. As the shell changes, it can control when and how much underlying antigen becomes accessible to the surrounding biological environment. This makes erosion kinetics relevant to immunology studies examining relationships between material stability, antigen presentation, and immune-modulating outcomes.
A polymer shell can regulate exposure of an underlying antimicrobial agent by delaying or moderating its release as the coating loses material. Researchers can use erosion behavior to study how stability and release profiles relate to antimicrobial delivery in biological environments. The same design principle also supports investigation of immune-modulating compounds where timing of exposure affects experimental outcomes.