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2Â¥2012-06-12 20:26:38
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2Â¥: Originally posted by qqwei at 2012-06-12 20:26:38
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3Â¥2012-06-12 22:57:04
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xiaocai716: ½ð±Ò+2, ¡ï¡ï¡ïºÜÓаïÖú 2012-06-13 09:01:03
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3Â¥: Originally posted by xiaocai716 at 2012-06-12 22:57:04
Âòµ½ÊDz»ÄÑ µ«ÊǷdz£¹ó........

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A typical polysulfone is produced by the reaction of a diphenol and bis(4-chlorophenyl)sulfone, forming a polyether by elimination of sodium chloride:
n HOC6H4OH + n (ClC6H4)2SO2 + n Na2CO3 ¡ú [OC6H4OC6H4SO2C6H4]n + 2n NaCl + n H2O + n CO2
The diphenol is typically bisphenol-A or, 1,4-dihydroxybenzene. Such step polymerizations require highly pure monomer to ensure high molecular weight products.[1]
Õâ¸ö[1]ÊÇ£ºa b David Parker, Jan Bussink, Hendrik T. van de Grampel, Gary W. Wheatley, Ernst-Ulrich Dorf, Edgar Ostlinning, Klaus Reinking, "Polymers, High-Temperature" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH: Weinheim. doi:10.1002/14356007.a21_449

ÁíÍ⣺http://www.chemsystems.com/repor ... ts/0304-S12-abs.pdf
4Â¥2012-06-13 02:08:23
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5Â¥2012-06-13 02:09:28
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6Â¥2012-06-13 13:35:57
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