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Showing 1 to 8 of 8 for “"Glassy polymer"”.
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Atomistic simulations of elastic-plastic deformation of amorphous polymers
As the demand for polymers with superior properties increases, an understanding of the fundamental connections between the mechanical behavior and underlying chemical structure becomes imperative. In this work, the thermo-mechanical behavior and the molecular-level origins of plastic deformation of …
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Sub-Tg̳, solid-state, plasticity-induced bonding of polymeric films and continuous forming
If two pieces of a glassy polymer are brought into intimate contact (within molecular proximity) at temperatures well below their glass transition temperature (Tg) negligible adhesion, due to lack of inter-diffusion of macromolecules, will be noted. Because polymer chains are kinetically trapped …
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Effect of photoageing and plasticizer content on the mechanical and adhesive properties of polyvinylbutyral
… low plasticizer contents, up to 10%, acts as a glassy polymer at room temperature. At higher plasticizer concentrations, greater than 20%, the material becomes elastomeric, with increased ductility and decreased moduli. The adhesive strength of each of the formulations was similar if compared at …
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Gas transport properties of reverse selective nanocomposite materials
… poly(1-trimethylsilyl-1-propyne) (i.e., a super glassy polymer) and 1,2-polybutadiene (i.e., a rubbery polymer) has been examined. Particle dispersion has been investigated using atomic force microscopy and transmission electron microscopy to determine particle/aggregate size and distribution. …
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Mixed Gas Transport Study Through Polymeric Membranes: A Novel Technique
The gas transport and separation properties of polymers have been successfully exploited in commercial ventures. Industrial applications employing membrane processes range from production of pure gases to barrier coatings for protection against environmental elements. Membrane separations are …
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Reverse-selective gas-separation membranes prepared by atom transfer radical polymerization
… thin poly(ethylene oxide) (PEO)–based polymer films grown from porous substrates via surface–initiated atom transfer radical polymerization (ATRP). PEO has an excellent CO<sub>2</sub> solubility, but crystallization of PEO chains leads to low CO<sub>2</sub> permeability and …
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Durability of Polymer Matrix Composites for Infrastructure: The Role of the Interphase
As fiber reinforced polymer matrix composites find greater use in markets such as civil infrastructure and ground transportation, the expectations placed on these materials are ever increasing. The overall cost and reliability have become the drivers of these high performance materials and have led …
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Strain Localization in Tungsten Heavy Alloys and Glassy Polymers
… Similar phenomenon has been observed in glassy polymers deformed both at slow and high strain rates. Whereas strain localization is attributed to material softening due to thermal heating in metallic alloys, it is believed to be due to the reorganization of the molecular structure in …