稳定自由基存在下苯乙烯聚合的加速剂  

Some New Rate-accelerating Additives for Nitroxide-mediated Living Free Radical Polymerization of Styrene

作　　者：林建[1] 李万利[1] 颜明发[1] 庄荣传[1] 邹友思[1] 

机构地区：[1]厦门大学材料科学系固体表面物理化学国家重点实验室,厦门361005

出　　处：《高等学校化学学报》2002年第2期318-320,共3页Chemical Journal of Chinese Universities

基　　金：固体表面物理化学国家重点实验室基金 (批准号 :1130 )资助

摘　　要：研究了稳定自由基存在下苯乙烯的活性聚合 .发现在β-酮酸酯 [乙酰乙酸乙酯 ( AAE) ,乙二酸二乙酯( DEM) ],1 ,3-二酮 [乙酰丙酮 ( AAT) ]及强酸酐 [三氟乙酸酐 ( TFA) ]的少量存在下 ,苯乙烯聚合速率显著增加 ,分子量可控 ,分子量分布较窄 .而有机强酸 [氯乙酸 ( CAA) ,溴乙酸 ( BAA) ,2 ,4 ,6-三硝基苯酚 ( TNP)Living free radical polymerizations of styrene were studied with the initiator of benzoyl peroxide in the presence of TEMPO(2,2,6,6 tetramethylpiperidinyl 1 oxy). The purpose of this paper is to explore the polymerization rate enhancement by means of using additives. It was found that styrene polymerization was distinctly accelerated by the addition of small amounts of a 1,3 diketone(acetylacetone, AAT) , a β keto ester(acetoacetic ester, AAE) or diethyl malonate(DEM) and a strong organic anhydride(trifluoroacetic acid anhydride, TFA). However, some of strong organic acid, chloroacetic acid(CAA), bromoacetic acid(BAA) and 2,4,6 trinitrophenol(TNP) did not enhance the rate of the stable free radical mediated polymerization.

关 键 词：稳定自由基 活性自由基聚合 加速剂 苯乙烯 聚苯乙烯 AAE DEM AAT TFA 

分 类 号：O632.13[理学—高分子化学]