Synthesis and Mechanical Properties of Polypropylene‐based Polymer Hybrids via Controlled Radical Polymerization
Synthesis and Mechanical Properties of Polypropylene‐based Polymer Hybrids via Controlled Radical Polymerization
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DOI：
10.1002/masy.200751402
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发表时间：
2007-12
影响因子：
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通讯作者：
H. Kaneko;S. Matsuo;N. Kawahara;Junji Saito;T. Matsugi;N. Kashiwa
中科院分区：
文献类型：
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作者：
H. Kaneko;S. Matsuo;N. Kawahara;Junji Saito;T. Matsugi;N. Kashiwa
以等规聚丙烯（iPP）为大分子引发剂，采用可控自由基聚合法合成了聚甲基丙烯酸甲酯（MMA）、聚丙烯酸丁酯（BA）和聚苯乙烯（PS）的等规聚丙烯接枝共聚物。以茂金属/甲基铝氧烷/三异丁基铝为催化剂，丙烯/10-十一碳烯-1-醇为共聚单体，采用2-溴异丁酰溴处理羟基化异丙基聚丙烯（PP-g-Br）。PP-g-Br在铜催化体系中可引发甲基丙烯酸甲酯、丙烯酸正丁酯和苯乙烯的可控自由基聚合，得到不同极性链段含量的聚丙烯接枝共聚物。这些接枝共聚物表现出独特的机械性能取决于接枝极性链段的种类和含量。
Isotactic polypropylene-based graft copolymers linking poly(methyl methacrylate), poly(n-butyl acrylate) and polystyrene were successfully synthesized by a controlled radical polymerization with isotactic polypropylene (iPP) macroinitiator. The hydroxylated iPP, prepared by propylene/10-undecen-i-ol copolymerization with a metallocene/methyl-aluminoxane/triisobutylaluminum catalyst system, was treated with 2-bromoisobutyryl bromide to produce a Br-group containing iPP (PP-g-Br). The resulting PP-g-Br could initiate controlled radical polymerization of methyl methacrylate, n-butyl acrylate and styrene by using a copper catalyst system, leading to a variety of iPP-based graft copolymers with a different content of the corresponding polar segment. These graft copolymers demonstrated unique mechanical properties dependent upon the kind and content of the grafted polar segment.