vinyl

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vinyl

1. of, consisting of, or containing the monovalent group of atoms CH2CH-
2. of, consisting of, or made of a vinyl resin
3. any vinyl polymer, resin, or plastic, esp PVC
4. (collectively) conventional records made of vinyl as opposed to compact discs
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

vinyl

Any of various tough, flexible plastics made from polyvinyl resin. See also: Plexiglas
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

vinyl

A thermoplastic compound made from polymerized vinyl chloride, vinylide chloride, or vinyl acetate; includes some plastics made from styrene and other chemicals.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

vinyl record

An analog audio recording pressed in vinyl. The 45 RPM record holds one song per side, while 33 1/3 RPM "Long Play" records hold an entire album (see LP). With the sound literally "carved" in a spiral groove starting at the outer edge of the platter, the undulations in the groove are an analog of the original acoustic waves. A needle (stylus) is placed in the groove, which oscillates as the platter rotates. The oscillations are converted to electricity, amplified and sent to the speakers.

The Stereo V Groove Breakthrough
In a monophonic record, an undulating horizontal groove is cut into the vinyl, providing both frequency and amplitude. Stereo, which was a big deal when introduced in the late 1950s, was designed for backward compatibility. Stereo places left and right channels in a V groove, and each side of the groove is 90 degrees from the other. From the horizontal motion of the stylus, the stereo cartridge senses the channels independently, but a monophonic cartridge picks up left and right as one. However, the stereo groove has a vertical component that provides a left-minus-right difference signal, which is only picked up by the stereo cartridge.

A Bit of a Renaissance
Audiophiles believe the analog sound in vinyl records is the purest audio recording, and vinyl records and turntables have been making a comeback over the past several years. Although only a fraction of total music revenue, approximately 13 and 14 million vinyl record albums were sold in 2016 and 2017 respectively. See stylus and turntable.


The 78 RPM Record
Originally constructed of shellac resin, 78 records made of vinyl debuted during World War II, when shellac was limited. This Edison 78 RPM player was made by the Victor Talking Machine Company circa 1916.







45 RPM Players
Introduced in the late 1940s, the small 45 RPM vinyl record was a hit among teenagers. Due to the smaller size, portable players became very popular. (Images courtesy of Vintage Vibe, www.thevintagevibestore.com)


45 RPM Players
Introduced in the late 1940s, the small 45 RPM vinyl record was a hit among teenagers. Due to the smaller size, portable players became very popular. (Images courtesy of Vintage Vibe, www.thevintagevibestore.com)







"The Sweet Sound of Vinyl"
A far cry from the turntables above, this VPI Avenger for 33 RPM LPs is pure audiophile quality. "The sweet sound of vinyl" is the company's tag line for the product. (Image courtesy of VPI Industries, www.vpiindustries.com)
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References in periodicals archive ?
Chen, "Formation mechanism and crystallization of poly(vinylidene fluoride) membrane via immersion precipitation method," Desalination, vol.
Figure 8(b) shows digital photographs of electrospun nanofiber mats of poly(vinylidene fluoride)-co-hexafluoropropylene (PVDFHFP)/ C8 (top panel) and poly(methylacrylate) (PMMA)/ C8 (bottom panel) displaying strong photoluminescence under [[lambda].sub.ex] = 365 nm and [[lambda].sub.ex] = 254 nm excitation.
Urethane & Polyurethane Resins, Urethane Crosslinkers, VAE Resins, Varnishes, Vinyl Chloride S Vinylidene Chloride Polymer Emulsions, Vinyl Resins, VOC-Exempt Solvents, Water Repellents--Silicone, Corrosion Inhibitors, Water Treatment Chemicals, Water-Thinned Resins, Waxes
2 cm incision was made in the peritoneum, the ileum was drawn out and the mesentery was spread on a glass plate, which was covered by a thin vinylidene chloride film to prevent moisture evaporation.
Kim et al., "Polymer electrolytes based on an electrospun poly(vinylidene fluoride-co-hexafluoropropylene) membrane for lithium batteries," Journal of Power Sources, vol.
Wilson, "Poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) based composite electrolytes for lithium batteries," European Polymer Journal, vol.
Spin cast ferroelectric beta poly(vinylidene fluoride) thin films via rapid thermal annealing.
Poly((vinylidene fluoride)) PVDF (average Mwt~534,000 by PC, powder) (Sigma Aldrich), and (1-Methyl-2-Pyrrolidinone (NMP)) (Anhydrous 99.5%) (Sigma Aldrich) as a solvent without any purification were used in this study for the purpose of PVDF membrane preparation.
PVDF is a fluorinated semi-crystalline thermoplastic which is obtained by polymerizing vinylidene fluoride.
75 wt.% carbyne polysulfide active material, 15 wt.% super-P carbon powder, and 10 wt.% poly(vinylidene fluoride) (PVDF) dissolved in Nmethyl-2-pyrrolidinone (NMP) were mixed and coated onto a copper foil with a typical thickness of 50 [micro]m.
The peak acoustic amplitude in degassed water was measured using a calibrated poly-(vinylidene difluoride-trifluoroethylene) needle-type hydrophone (Toray Techno Co., Ltd., Japan), 0.5 mm in diameter, connected to a personal or compatible computer and a digitizing oscilloscope (TDS3034, Tektronix Japan, Ltd., Japan).
Vinylidene chloride and toluene, the 2 other chemicals with discordant results, were tested via different routes of exposure (i.e., toluene exposure was via inhalation by NTP and gavage by RI; vinylidene chloride exposure was gavage by NTP and inhalation by RI).