Alumina Additives for Fast Iron-Mediated AGET ATRP of MMA Using Onium Salt as Ligand

作者：Bai Liangjiu; Zhang Lifen; Zhang Zhengbiao; Zhu Jian; Zhou Nianchen; Cheng Zhenping^*; Zhu Xiulin

来源：Journal of Polymer Science Part A: Polymer Chemistry , 2011, 49(18): 3970-3979.

DOI：10.1002/pola.24837

• additives
• adhesives
• alumina
• atom transfer radical polymerization (ATRP)
• iron catalyst
• kinetics (polym.)
• rate enhancement

Three kinds of alumina (acidic, neutral, and basic Al(2)O(3)) were effective as additives for the control and rate enhancement of iron-mediated AGET (activators generated by electron transfer) ATRP (atom transfer radical polymerization) of methyl methacrylate (MMA) in the presence of limited amount of air, using FeCl(3)center dot 6H(2)O as the catalyst, tetrabutylammonium bromide or tetra-n-butylphosphonium bromide as the ligand, ethyl 2-bromoisobutyrate as the initiator, and ascorbic acid as the reducing agent. The conversion could be up to 83.9% in the case of basic Al(2)O(3) and 75.3% with neutral Al(2)O(3) only in 13 h, respectively, whereas no polymer could be obtained even in 50 h without additives. The polymers obtained with neutral and basic Al(2)O(3) had controlled molecular weights and low M(w)/M(n) values (similar to 1.2). Tacticities of the as-prepared PMMA in the presence of these three kinds of Al(2)O(3) were consistent with that obtained from conventional free-radical polymerization of MMA.

• 出版日期2011-9-15
• 单位苏州大学