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xiaocai716: ½ð±Ò+2, ¡ï¡ï¡ïºÜÓаïÖú 2012-06-13 09:01:03
xiaocai716: ½ð±Ò+2, ¡ï¡ï¡ïºÜÓаïÖú 2012-06-13 09:01:03
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×Ô¼ººÏ³ÉÅÂÊdzɱ¾¸ü¸ß£¬¹ú²úµÄ¼Û¸ñµÍºÜ¶à ¾Ûí¿ºÏ³ÉûÄÇô¼òµ¥£¬Èç¹ûûÓÐ×ã¹»µÄºÏ³É¾Ñ飬¼´Ê¹ÕÕ×ÅÎÄÏ××öÒ²ÐèÒªºÜ³¤Ê±¼äÃþÌõ¼þ£¬µÃ²»³¥Ê§ һЩ×ÊÁÏ£º 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 |
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