We present measurements of the low-temperature thermal conductivity of a number of polymeric and composite materials from 0.3 to 4 K. The materials measured are Vespel SP-1, Vespel SP-22, unfilled PEEK, 30% carbon fiber-filled PEEK, 30% glass-filled PEEK, carbon fiber Graphlite composite rod, Torlon 4301, G-10/FR-4 fiberglass, pultruded fiberglass composite, Macor ceramic, and graphite rod. The...

Replacing nonrenewable polymers with renewable ones is desirable for packaging applications. For this purpose, a number of poly(glucaramides) were synthesized and tested for applications requiring water resistance. The polymers were prepared from the polycondensation of esterified glucaric acid and a diamine, the former being obtained from the oxidation of glucose, thus providing a renewable so...

Fiber-reinforced 3D printing technology offers significant improvement in the mechanical properties of resulting composites relative to printed (3DP) polymer-based composites. However, 3DP fiber-reinforced composite structures suffer from low fiber content compared traditional composite, such as orthogonal woven preforms solidified with vacuum assisted resin transfer molding (VARTM) that impede...

Recent molecular dynamics simulations [1-3] suggested that the polymer-surface interactions can be the dominant factor in the rheology of polymer systems filled with nanoparticles. These interactions include the short-range forces between the surfaces and the polymer segments. These forces can be responsible for the suppression of the mobility of the polymer segments at the surfaces and even re...

Objective The aim of this study was to examine the properties of fiber-reinforced composite and stainless steel twisted retainers for orthodontic retention. Methods Three different span lengths (5.0, 8.0, and 14.0 mm) of fiber-reinforced composite were investigated. The three fiber-reinforced composite retainer groups were subdivided according to the storage condition (dry and wet), resulting...

In line with technological advancements, the construction industry worldwide has sought more efficient building systems in relation to aspects such as increased productivity, reduced material waste and meeting growing demand. The objective of this research was use structural joints composed composite dowels laminated wood beams an alternative connect pieces wood. Composite materials are a matri...

In this study, the impact properties of kenaf fibre reinforced hybrid fiberglass/Kevlar polymeric composite was investigated. a new fiber arrangement based on bast as reinforcement to and polyester matrix used fabricate composite. Five different types samples with content volume fraction (0, 15, 45, 60 75%) polymer composites were manufactured. 0% has been control sample. The results showed tha...

Fibre-reinforced polymer(FRP), also Fibre-reinforced plastic, is a composite material made of a polymer matrix reinforced with fibres. The fibres are usually glass, carbon, or aramid, al‐ though other fibres such as paper or wood or asbestos have been sometimes used. The poly‐ mer is usually an epoxy, vinylester or polyester thermosetting plastic, and phenol formaldehyde resins are still in use...