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- Q409703 subject Q7138888.
- Q409703 subject Q7446714.
- Q409703 subject Q8773993.
- Q409703 subject Q8925450.
- Q409703 subject Q8968597.
- Q409703 abstract "CR-39, or allyl diglycol carbonate (ADC), is a plastic polymer commonly used in the manufacture of eyeglass lenses. The abbreviation stands for "Columbia Resin #39", which was the 39th formula of a thermosetting plastic developed by the Columbia Resins project in 1940.The first commercial use of CR-39 monomer was to help create glass-reinforced plastic fuel tanks for the B-17 bomber aircraft in World War II, reducing weight and increasing range of the bomber. After the War, the Armorlite Lens Company in California is credited with manufacturing the first CR-39 eyeglass lenses in 1947. CR-39 plastic has an index of refraction of 1.498 and an Abbe number of 58. CR-39 is now a trade-marked product of PPG Industries.An alternative use includes a purified version that is used to measure neutron radiation, a type of ionizing radiation, in neutron dosimetry.CR-39 should not be confused with polycarbonate, a tough homopolymer usually made from bisphenol A.".
- Q409703 thumbnail PADC_neu.svg?width=300.
- Q409703 wikiPageExternalLink search=%22cr-39%2059.3%22.
- Q409703 wikiPageExternalLink why-cr39-shouldnt-be-confused-with-polycarbonate.
- Q409703 wikiPageWikiLink Q102769.
- Q409703 wikiPageWikiLink Q1087688.
- Q409703 wikiPageWikiLink Q1107319.
- Q409703 wikiPageWikiLink Q1133.
- Q409703 wikiPageWikiLink Q11391.
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- Q409703 wikiPageWikiLink Q7138888.
- Q409703 wikiPageWikiLink Q7224880.
- Q409703 wikiPageWikiLink Q7446714.
- Q409703 wikiPageWikiLink Q76299.
- Q409703 wikiPageWikiLink Q768575.
- Q409703 wikiPageWikiLink Q81163.
- Q409703 wikiPageWikiLink Q868477.
- Q409703 wikiPageWikiLink Q876650.
- Q409703 wikiPageWikiLink Q8773993.
- Q409703 wikiPageWikiLink Q8925450.
- Q409703 wikiPageWikiLink Q8968597.
- Q409703 wikiPageWikiLink Q898597.
- Q409703 wikiPageWikiLink Q922364.
- Q409703 comment "CR-39, or allyl diglycol carbonate (ADC), is a plastic polymer commonly used in the manufacture of eyeglass lenses. The abbreviation stands for "Columbia Resin #39", which was the 39th formula of a thermosetting plastic developed by the Columbia Resins project in 1940.The first commercial use of CR-39 monomer was to help create glass-reinforced plastic fuel tanks for the B-17 bomber aircraft in World War II, reducing weight and increasing range of the bomber.".
- Q409703 label "CR-39".
- Q409703 depiction PADC_neu.svg.