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Spandex, Lycra, or elastane is a synthetic fiber known for its exceptional elasticity. It is a polyether - polyurea copolymer that was invented in 1958 by chemist Joseph Shivers at DuPont . [ 1 ] [ 2 ] [ 3 ]
A lycra jacket. Stretch fabric is a synthetic fabric that stretches. Stretch fabrics are either 2-way stretch or 4-way stretch. 2-way stretch fabrics stretch in one direction, usually from selvedge to selvedge (but can be in other directions depending on the knit). 4-way stretch fabrics, such as spandex, stretches in both directions, crosswise and lengthwise. [1]
Yoga pants are worn by women around the U.S. -- who probably don't do yoga. But hey, they're comfy. Well, Cape Cod Regional Technical High School has a dress code that doesn't allow students to ...
What reviewers say 💬. These top-selling compression leggings have a lot of voices vouching for their amazingness — nearly 27,000 five-star ratings, in fact.. Pros 👍 "My third order in ...
Made of acrylic, polyester spandex for a cozy, stretchy fit. Available in seven colorways in sizes XXS to XXL, though the brand recommends sizing down as it runs oversized. $46 at Nordstrom
Listed pros and cons must, as for all content, be sourced by a reference, either in the list or elsewhere in the article. (A "criticisms and defenses" list is a backwards pro and con list. The opposing side is presented first, followed by the responses of the defending side. Lists of this form seem to grow out of more contentious articles.)
Synthesis of Spandex. [22] The monomers can be activated by Bronsted acids, carbenium ions, onium ions, and metal cations. [19] CROP can be a living polymerization and can be terminated by nucleophilic reagents such as phenoxy anions, phosphines, or polyanions. [19]
Nomex and related aramid polymers are related to nylon, but have aromatic backbones, and hence are more rigid and more durable. Nomex is an example of a meta variant of the aramids (Kevlar is a para aramid).