Styrophone is often made from what type of closed-cell polystyrene?
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Styrophone A styrophone is an acoustic device made from expanded polystyrene foam (often referred to by the genericized trademark "Styrofoam") and it goes toot toot. There are at least two varieties:
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Styrofoam Styrofoam is a trademarked brand of closed-cell extruded polystyrene foam currently made for thermal insulation and craft applications. It is owned and manufactured by The Dow Chemical Company.
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Polyhexahydrotriazine Polyhexahydrotriazines (PHTs) are polymers of hexahydro-1,3,5-triazines, a class of heterocyclic compounds with the formula (CHNR). They are among the strongest known thermosetting plastics and are stable to solvents at pH > 3, but decompose to the monomers in acidic solutions.
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Pressboard Pressboard is a class of cellulose-based material constructed of several layers (plies) of paper which, when compressed using a combination of heat and pressure, form a stiff, dense material in a range of weights. Pressboard has been widely used in traditional school and office products such as spiral-bound notebooks and three-ring binders, but its unique physical characteristics lend itself readily to a variety of end-uses, including (but not limited to) document storage, filing supplies (classification and file folders), report covers, folding cartons, tags, labels, and industrial applications. It is commonly used to make the back panels of radios and some televisions. Pressboard may be converted using a number of different techniques (scoring, folding, die-cutting), and accepts a range of value-add decorating techniques (coating, foil-stamping, screen-printing, and embossing). Pressboard may contain recycled fiber content (including post-consumer waste), and is typically itself recyclable and biodegradable, making it an environmentally-sound choice for those seeking an alternative to petroleum-derived substrates.
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Pearloid Pearloid is a plastic that is intended to resemble mother of pearl. It is commonly used in making musical instruments, especially for pickguards, electric guitars, and accordions.
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Polyimide foam Polyimide foam is a foam originally designed for NASA by Inspec Foams Inc. under the brand name Solimide. Its primary purposes are as an insulator (such as for rocket fuels) and acoustic damper. NASA engineered the product to have relatively low outgassing (a problem in vacuum and aboard spacecraft), desirable thermal and acoustic performance, as well as uniformity during distribution and application. Typical uses of the foam include ducting, duct/piping insulation, structural components, and strengthening of hollow components while remaining lightweight. In addition to thermal and acoustic properties, polyimide foam is fire resistant, lightweight and non-toxic.
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Poly(ethylene succinate) Poly(ethylene succinate) (PES) is an aliphatic synthetic polyester with a melting point from 103–106 °C. It is synthesized from dicarboxylic acids; either by ring-opening polymerization of succinic anhydride with ethylene oxide or by polycondensation of succinic acid and ethylene glycol. Thermophilic "Bacillus" sp. TT96 is found in soil and can degrade PES. Mesophilic PES degrading microorganisms were found in the "Bacillus" and "Paenibacillus" species; strain KT102; a relative of "Bacillus pumilus" was the most capable of degrading PES film. The fungal species NKCM1003 a type of "Aspergillus clavatus" also degrades PES film.
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Polyethylene naphthalate Polyethylene naphthalate (poly(ethylene 2,6-naphthalate or PEN) is a polyester with good barrier properties (even better than Polyethylene terephthalate). Because it provides a very good oxygen barrier, it is particularly well-suited for bottling beverages that are susceptible to oxidation, such as beer. It is also used in making high performance sailcloth. It also has been found to show supreme scintillation properties and is expected to replace classic plastic scintillators.
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Ferroelectret Ferroelectrets also known as piezoelectrets, are thin films of polymer foams, exhibiting piezoelectric and pyroelectric properties after electric charging. Ferroelectret foams usually consist of a cellular polymer structure filled with air. Polymer-air composites are elastically soft due to their high air content as well as due to the size and shape of the polymer walls. Their elastically soft composite structure is one essential key for the working principle of ferroelectrets, besides the permanent trapping of electric charges inside the polymer voids. The elastic properties allow large deformations of the electrically charged voids. However, the composite structure can also possibly limit the stability and consequently the range of applications.
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Spharophon The Sphärophon or a Spherophone is an electrical musical instrument that was first made as the "Electrophon" around 1921 by Jörg Mager, later modified, renamed and exhibited in 1926.
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Cycloalkene A cycloalkene or cycloolefin is a type of alkene hydrocarbon which contains a closed ring of carbon atoms, but has no aromatic character. Some cycloalkenes, such as cyclobutene and cyclopentene, can be used as monomers to produce polymer chains. Due to geometrical considerations, smaller cycloalkenes are almost always the "cis" isomers, and the term "cis" tends to be omitted from the names. In larger rings (from around 8 atoms), "cis"–"trans" isomerism of the double bond may occur.
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Polypropylene polybenzyl isocyanate Polypropylene polybenzyl isocyanate, or PPI, is a polyurea-based polymer derived from isocyanate monomers that is used in some glues, aerosol foams, plastics, paint and household products.
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Polytetrahedron Polytetrahedron is a term used for three distinct types of objects, all based
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Polyester Polyester is a category of polymers that contain the ester functional group in their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyesters include naturally occurring chemicals, such as in the cutin of plant cuticles, as well as synthetics through step-growth polymerization such as polybutyrate. Natural polyesters and a few synthetic ones are biodegradable, but most synthetic polyesters are not. This material is used very widely in clothing.
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Perfluoroalkoxy alkane Perfluoroalkoxy alkanes or PFA are fluoropolymers. They are copolymers of tetrafluoroethylene (CF) and perfluoroethers (CFOR, where R is a perfluorinated group such as trifluoromethyl (CF)). In terms of their properties, these polymers are similar to polytetrafluoroethylene (PTFE). The big difference is that the alkoxy substituents allow the polymer to be melt-processed. On a molecular level, PFA has a smaller chain length, and higher chain entanglement than other fluoropolymers. It also contains an oxygen atom at the branches. This results in a material that is more translucent and has improved flow, creep resistance, and thermal stability close to or exceeding PTFE. Similarly advantaged processing properties are found in fluorinated ethylene propylene (FEP), the copolymer of tetrafluoroethylene and hexafluoropropylene.
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Polytarp sails Polytarp sails refer to sails constructed from rectangular polyethylene tarpaulins. Home boat builders often favor these synthetic "sheet" sails because the materials are inexpensive and easy to assemble into functional, durable sails.
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Plastic pants Plastic pants (also known as waterproof pants, plastic panties, diaper covers, nappy covers, or pilchers) are devices worn over a diaper for the purpose of containing liquid or solid waste that may otherwise leak through the fabric. Today, "plastic pants" are usually made out of polyvinyl chloride (PVC) or polyurethane (PU), though, in some instances, latex rubber is still used. Latex rubber has significant drawbacks in these applications: it is easily damaged by rough handling and by oils, creams, and ointments; it does not allow air to ventilate; it also makes a characteristic rustling noise when moved, which limits its use in situations where discretion is necessary.
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Phenolic paper Phenolic paper is a material often used to make printed circuit board substrates (the flat board to which the components and traces are attached). It is a very tough board made of wood fibre and phenolic polymers. It is most commonly brown in colour, and is a fibre reinforced plastic. These PCB materials are known as FR-1 and FR-2 – FR-1 is rated to 130°C, FR-2 is rated to 105°C.
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EPDM rubber EPDM rubber (ethylene propylene diene monomer (M-class) rubber), a type of synthetic rubber, is an elastomer characterized by a wide range of applications. The "M" refers to its classification in ASTM standard D-1418; the "M" class includes rubbers having a saturated chain of the polymethylene type. Dienes currently used in the manufacture of EPDM rubbers are dicyclopentadiene (DCPD), ethylidene norbornene (ENB), and vinyl norbornene (VNB). EPDM rubber is closely related to ethylene propylene rubber: ethylene propylene rubber is a copolymer of ethylene and propylene, whereas EPDM rubber is a terpolymer of ethylene, propylene, and a diene-component.
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Inorganic polymer Inorganic polymers are polymers with a skeletal structure that does not include carbon atoms in the backbone. Polymers containing inorganic and organic components are sometimes called hybrid polymers, and most so-called inorganic polymers are hybrid polymers. One of the best known examples is polydimethylsiloxane, otherwise known commonly as silicone rubber. Inorganic polymers offer some properties not found in organic materials including low temperature flexibility, electrical conductivity, and nonflammability. Inorganic polymers focus on 1-dimensional polymers, not heavily crosslinked materials such as silicate minerals. Inorganic polymers with tunable or responsive properties are sometimes called smart inorganic polymers. A special class of inorganic polymers are geopolymers, which may be anthropogenic or naturally occurring.
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Polyglycolide Polyglycolide or poly(glycolic acid) (PGA), also spelled as polyglycolic acid, is a biodegradable, thermoplastic polymer and the simplest linear, aliphatic polyester. It can be prepared starting from glycolic acid by means of polycondensation or ring-opening polymerization. PGA has been known since 1954 as a tough fiber-forming polymer. Owing to its hydrolytic instability, however, its use has initially been limited. Currently polyglycolide and its copolymers (poly(lactic-"co"-glycolic acid) with lactic acid, poly(glycolide-"co"-caprolactone) with ε-caprolactone and poly (glycolide-"co"-trimethylene carbonate) with trimethylene carbonate) are widely used as a material for the synthesis of absorbable sutures and are being evaluated in the biomedical field.
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Footed drum A footed drum is a class of membranophone, of Native American and Polynesian origin, characterized by an open area at the bottom of the instrument, held by feet. This open area adds resonance to the drum's sound. It is made out of hollow wood and/or bone.