We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Study of moisture absorption by an organoplastic
AI summary Read the abstract
A comprehensive study of moisture absorption in unidirectionally reinforced organoplastic composites found the process follows Fickian diffusion with sorbed moisture distributed in strongly and weakly bound states, enabling a hierarchical calculation method from component to laminate level. This characterization framework supports reliable prediction of moisture-induced property changes in aramid fiber composites for structural applications.
A complex experimental study of the state of sorbed moisture in a unidirectionally reinforced organoplastic was conducted. The methods of TG, DSC, DTA, and NMR showed that moisture absorption in OP is reversible up to 8%, the sorbed moisture does not crystallize in the temperature range from −70 to 0 °C, it is finely dispersely distributed and is in the strongly and weakly bound state, and there is almost no free moisture. The results of the sorption experiments conducted on OP and its structural components: microplastic and EDT-10 binder, in a wide range of temperature-humidity conditions and the data from physical studies showed that moisture absorption in the materials basically takes place by diffusion and is satisfactorily described by a phenomenological model based on the Fick equation. A method of accelerated determination of the sorption characteristics of anisotropic composite materials was developed, using the introduced concept of the fictitious diffusion coefficient and the extrapolation method of determining the limiting moisture content. The features of migration of moisture on the interface in a multiphase system were investigated, and the possibility of successive calculation estimation of the sorption characteristics of an organoplastic at different structural levels was demonstrated: components—unidirectionally reinforced composite—model laminated article. The tested phenomenological model of the sorption process and the experimentally obtained values of the characteristics of the material were the basis for a method of calculation determination of the resource of moisture-proofing properties of a model multilayer article of CM in nonstationary external conditions.
More Papers Like This
Heat resistance of epoxy plastics
AI summary Read the abstract
A thermomechanical analysis method using the Perkin-Elmer TMA-7 was validated for evaluating deformation heat resistance of epoxy microplastics, showing consistent rankings by both strength and rigidity criteria. This simple yet sensitive characterization method helps engineers select appropriate epoxy formulations for high-temperature structural applications.
Determination of Shear Strength at the Fiber–Matrix Interface in an Organic Plastic
AI summary Read the abstract
This paper describes a materials engineering technique for measuring fiber-matrix interfacial shear strength in para-aramid epoxy composites, reporting a limiting shear strength of 105.2 MPa. It concerns structural composite materials testing and is not related to environmental microplastic pollution or associated health risks.
Sorptive Properties of Microplastics Extracted from Cosmetics
AI summary Read the abstract
Researchers analyzed the sorptive properties of microbeads extracted from cosmetic products, finding that these particles can readily bind pollutants from water before being flushed into wastewater systems. Because cosmetic microbeads often bypass treatment filters, they may carry adsorbed toxic chemicals directly into aquatic ecosystems and potentially up the food chain.
Sorptive Properties of Microplastics Extracted from Cosmetics
AI summary Read the abstract
Microbeads from cosmetic products were found to have significant sorptive capacity for environmental pollutants, meaning they can accumulate and transport harmful chemicals after being flushed into wastewater systems and escaping treatment. This dual role as both a pollutant and a chemical carrier makes cosmetic microplastics a disproportionate environmental threat relative to their small size.
Comparative Study of the Impregnability of High-Strength Glass and Basalt Fibers
AI summary Read the abstract
This materials engineering paper studies the impregnation properties of glass and basalt fibers with epoxy resins for composite material manufacturing; the term 'microplastics' here refers to small fiber-reinforced plastic composite specimens, not environmental pollutants. It has no relevance to microplastic pollution or human health.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.