Reference

Modified styrene polymers

Modified styrene polymers. Taylor, Lynn J. (Owens-Illinois, Inc., USA). U.S. US 4025580 24 May 1977, 4 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08L025-18. NCL: 260874000. APPLICATION: US 72-315798 18 Dec 1972. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Polystyrene (I) [9003-53-6] was treated with phenacetyl chloride [103-80-0] in the presence of AlCl3 to introduce ketone groups into I to enhance environmental degradability. Thus, 0.08 mm thick film of modified I was irradiated 24 h at 305 nm, after which the extent of degrdn. (as measured by increase in absorbance at 1725 cm-1) was 0.665 compared to 0.080 for unmodified I.

New monomer for the synthesis of crosslinked poly(phenylquinoxalines)

New monomer for the synthesis of crosslinked poly(phenylquinoxalines). Zabel'nikov, N. S.; Agapov, O. A.; Vorob'ev, V. D. (USSR). Plast. Massy, (8), 72-3 (Russian) 1977. CODEN: PLMSAI. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) Poly(phenylquinoxalines) from bis(p-phenylglyoxalylphenoxyphenyl) glyoxal (I)-3,3',4,4'-tetraaminodiphenyl oxide copolymer (II) [64873-37-6] decomposes in air at 400° whereas I-3,3',4,4'-tetraaminodiphenyl oxide-1,4-bis(phenylglyoxalyl)benzene copolymer [64155-19-7] decomposes at 250-320°. The difference in heat resistance is attributed to the greater degree of polyheterocyclization in II. I monomer [59727-31-0] was prepd. by treating Ph2O [101-84-8] with (COCl2)2 [79-37-8] in presence of AlCl3 to give 67% bis(4-phenoxyphenyl)glyoxal [64180-18-3] which was then treated with PhCH2COCl [103-80-0] in presence of AlCl3 to give 63% bis[p-phenylacetylphenoxyphenyl) glyoxal [64180-19-4]. This was oxidized to I in 82% yield.