Block copolymer synthesis and chain extension from TEMPO‐terminated chains formed by ultrasonic chain scission
Block copolymer synthesis and chain extension from TEMPO‐terminated chains formed by ultrasonic chain scission
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嵌段共聚物的合成以及超声波断链形成的 TEMPO 封端链的扩链
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Y. Hepuzer
中科院分区：
文献类型：
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作者：
H. Çatalgil;Y. Hepuzer
在自由基清除剂2，2，6，6-四甲基-1-哌啶基氧基（克里思）存在下，对聚甲基丙烯酸乙酯（Mn 5 2，300，000）和聚苯乙烯（Mn 5 1，200，000）长链进行超声断裂.该程序产生具有较低分子量和克里思末端单元的聚合物。这些聚合物在苯乙烯的稳定自由基介导聚合中的应用导致扩锡永和嵌段共聚物，这取决于前体聚合物。通过NMR测量证实了嵌段共聚物的形成，并且通过GPC分析显示了链增长。© 2000 John Wiley & Sons，Inc.应用聚合物科学杂志77：1950 - 1953，2000年
Long poly(ethyl methacrylate) (Mn 5 2,300,000) and polystyrene (Mn 5 1,200,000) chains were subjected to ultrasonic scission in the presence of a radical scavenger, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO). This procedure yielded poly- mers with lower molecular weights and TEMPO terminal units. Application of these polymers in stable radical mediated polymerization of styrene resulted in chain exten- sion and block copolymers, depending on the precursor polymer. Block copolymer formation was evidenced by NMR measurement, and chain extension was shown by GPC analysis. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 1950 -1953, 2000