单词 | polyformal |
释义 | > as lemmaspolyformal polyformal n. Brit. /ˌpɒlɪˈfɔːml/ , U.S. /ˌpɑliˈfɔrm(ə)l/ = polyoxymethylene n.ΘΚΠ the world > matter > chemistry > polymer chemistry > resins and plastics > [noun] > thermoplastic resins > polyoxymethylene polyoxymethylene1908 polyformal1935 polyformaldehyde1959 society > occupation and work > materials > derived or manufactured material > synthetic resins and plastics > [noun] > plastic > capable of hardening after heating or (re)shaping > types of polystyrol1873 polyoxymethylene1908 polystyrene1927 polyvinyl chloride1930 polyacetal1931 polyformal1935 polypropylene1935 PVC1941 polyacrylic1959 phenoxy1962 polyallomer1962 ionomer1964 parylene1965 polypro1986 1935 Jrnl. Amer. Chem. Soc. 57 925/2 The rate of distillation was quite slow; in this respect, the polyformals resembled the..polyesters derived from the higher dibasic acids. 1994 Proc. SPIE (Internat. Soc. Optical Engin.) 2143 104 Of particular interest are the polyethers (polyformals) derived from dihalomethanes. < as lemmas |
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