Reference

Effect of temperature, pressure and additives on pyrolysis of polystyrene peroxide

Effect of temperature, pressure and additives on pyrolysis of polystyrene peroxide.Some chemicals with cas registry numbers like 123-30-8 and 9003-53-6 are also used. Kishore, K.; Ravindran, K. (Dep. Inorg. Phys. Chem., Indian Inst. Sci., Bangalore 560 012, India). J. Anal. Appl. Pyrolysis, 5(4), 363-70 (English) 1983. CODEN: JAAPDD. ISSN: 0165-2370. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Low-temp. decompn. studies at 60 and 70° were performed to elucidate the aging behavior of polystyrene peroxide (I). The exothermic decompn. was found to be complete in 44 h at 70°, suggesting that all peroxide bonds were broken. Enthalpy measurements of the aged samples were performed as a function of storage time. Aging was also studied by IR spectroscopy, and the intensity of the peroxide absorption around 1050 cm-1 was found to decrease with aging time. BzH formed as a result of I pyrolysis was readily converted into BzOH, which crystd. during the aging process. Pyrolysis-gas chromatog. studies showed that at ￡450°, the basic decompn. (i.e., the formation of BzN and HCHO as the major products) did not change. No effect of pressure on the decompn. exotherm in DTA was obsd., suggesting that peroxide compn. involved only condensed phase reactions. Hydroquinone [123-31-9], p-aminophenol [123-30-8], and CdS2 were found to retard the thermal decompn. of I, suggesting that these compds. would be potential antioxidants for polymers. .

Preparation of new photosensitive material DBMPAZC for blue prints

Preparation of new photosensitive material DBMPAZC for blue prints. Liang, Dexiu (Beijing Chem. Eng. Fact., Beijing, Peop. 4858-52-0 and 615-67-8 are cas registry numbers. These chemicals are also mentioned in this article. Rep. China). Huaxue Shijie, 23(3), 70-1 (Chinese) 1982. CODEN: HUAKAB. ISSN: 0367-6358. DOCUMENT TYPE: Journal CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The photosensitive compd. 2,5-dibutoxy-4-morpholinobenzenediazonium tetrachlorozincate (I)(DBMPAZC) [14726-58-0] was prepd. and was useful for blue prints. Treatment of hydroquinone [123-31-9] with (NH4)2Cr2O7 and H2SO4 gave benzoquinone [106-51-4] which was treated with HCl to form chlorohydroquinone (II) [615-67-8]. Alkylation of II with BuBr/NaOH gave 1-chloro-2,5-dibutoxybenzene [68052-10-8] which was treated with HNO3 to form 1-chloro-2,5-dibutoxy-4-nitrobenzene [89-30-5] and this was treated with morpholine [110-91-8] to give 1-morpholino-2,5-dibutoxy-4-nitrobenzene (III) [86-15-7]. 1-Morpholino-2,5-dibutoxy-4-aminobenzene [67828-46-0], prepd. by redn. of III, was treated with NaNO2 and HCl to give the diazonium chloride [4858-52-0] which was treated with ZnCl2 to form I. .