Polystyrene (PS) is a synthetic polymer made from monomers of the aromatic hydrocarbon styrene. Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and brittle. By weight, it is considered a relatively cheap resin and a fairly poor barrier to oxygen and water vapor, with a relatively low melting point. Polystyrene is one of the most widely used plastics, with the scale of its production being several million tonnes per year. Polystyrene is naturally transparent to visible light, but can be colored with colorants. Uses include protective packaging, containers, lids, bottles, trays, tumblers, disposable cutlery, models, and phonograph records.
Monomer
A monomer (/ˈmɒnəmər/ MON-ə-mər; mono-, "one" + -mer, "part") is a molecule that can react together with other monomer molecules to form a larger polymer chain or two- or three-dimensional network in a process called polymerization.[1][2][3].mw-parser-output .quotebox{background-color:#F9F9F9;border:1px solid #aaa;box-sizing:border-box;padding:10px;font-size:88%;max-width:100%}.mw-parser-output .quotebox.floatleft{margin:.5em 1.4em .8em 0}.mw-parser-output .quotebox.floatright{margin:.5em 0 .8em 1.4em}.mw-parser-output .quotebox.centered{overflow:hidden;position:relative;margin:.5em auto .8em auto}.mw-parser-output .quotebox.floatleft span,.mw-parser-output .quotebox.floatright span{font-style:inherit}.mw-parser-output .quotebox>blockquote{margin:0;padding:0;border-left:0;font-family:inherit;font-size:inherit}.mw-parser-output .quotebox-title{text-align:center;font-size:110%;font-weight:bold}.mw-parser-output .quotebox-quote>:first-child{margin-top:0}.mw-parser-output .quotebox-quote:last-child>:last-child{margin-bottom:0}.mw-parser-output .quotebox-quote.quoted:before{font-family:"Times New Roman",serif;font-weight:bold;font-size:large;color:gray;content:" “ ";vertical-align:-45%;line-height:0}.mw-parser-output .quotebox-quote.quoted:after{font-family:"Times New Roman",serif;font-weight:bold;font-size:large;color:gray;content:" ” ";line-height:0}.mw-parser-output .quotebox .left-aligned{text-align:left}.mw-parser-output .quotebox .right-aligned{text-align:right}.mw-parser-output .quotebox .center-aligned{text-align:center}.mw-parser-output .quotebox .quote-title,.mw-parser-output .quotebox .quotebox-quote{display:block}.mw-parser-output .quotebox cite{display:block;font-style:normal}@media screen and (max-width:640px){.mw-parser-output .quotebox{width:100%!important;margin:0 0 .8em!important;float:none!important}}
Polyphenism
A polyphenic trait is a trait for which multiple, discrete phenotypes can arise from a single genotype as a result of differing environmental conditions. It is therefore a special case of phenotypic plasticity.
Why we started Polywork
Polywork has officially been live for just over three weeks, marking what was an amazing 12 months of hard work and love from our…
propublica/weepeople
A typeface of people sillhouettes, to make it easy to build web graphics featuring little people instead of dots.
MD Thermochrome by Mass-Driver - Future Fonts
Our written world is made from little dots: little dots of ink from a printer; phosphors or pixels on a screen; blackened thermal paper on a sales receipt. MD Thermochrome is a typeface designed around little dots. It’s not a faithful mimicry of any single printing technique, but an allusion to several — the coarse grid of dot-matrix printers, the visible scanlines of CRT terminal fonts, the varying dot size of over- and under-inked documents from any number of technologies. Built on a consistent (but not quite square) grid, Thermochrome features five discrete italic angles (Upright, Italic, Inclined, Retalic, Reclined), eight weights, and over 100 icons and symbols.
Transformational Pathways to Sustainability Through Polycrisis
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Gallery | PolyCSS
Explore PolyCSS-rendered OBJ, glTF, GLB, VOX, textured, animated, and generated mesh examples in the DOM.
Polypane. The missing half of your web development environment.
A development browser for professional web developers. Build and test responsive, accessible websites with multi-viewport previews and accessibility tooling.
Polina Bright | Watercolor Brushes, Prints & Original Art
Cruelty-free watercolor brushes, limited edition Giclée prints, and original artworks by artist Polina Bright. Worldwide shipping available.
Categories of Containers
We introduce the notion of containers as a mathematical formalisation of the idea that many important datatypes consist of templates where data is stored. We show that containers have good closure properties under a variety of constructions including the formation of initial algebras and final coalgebras. We also show that containers include strictly positive types and shapely types but that there are containers which do not correspond to either of these. Further, we derive a representation result classifying the nature of polymorphic functions between containers. We finish this paper with an application to the theory of shapely types and refer to a forthcoming paper which applies this theory to differentiable types.
Mildliner Colour Reference
A guide to all the Mildliner colours, types, and sets
UV stabilizers. (Product Lines Reviewed). - Free Online Library
Free Online Library: UV stabilizers. (Product Lines Reviewed). by "Plastics Technology"; Business Chemicals, plastics and rubber Machinery industry Plastics industry Product information Plastics machinery Stabilizing agents
Plutonium
Plutonium is a chemical element; it has symbol Pu and atomic number 94. It is a silvery-gray actinide metal that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, silicon and hydrogen. When exposed to moist air, it forms oxides and hydrides that can expand the sample up to 70% in volume, which in turn flake off as a powder that is pyrophoric. It is radioactive and can accumulate in bones, which makes the handling of plutonium dangerous.
