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本文首次应用稀土配位催化剂NdL_3-A1(i-Bu)_3,在苯溶剂中,50℃下使苯乙烯-马来酸酐共聚,制得富于交替,数均分子量高达6—8.5×10~5的白色粉末共聚物。系统地研究了共聚合反应的特征及动力学行为,共聚合反应具有低的表现活化能(10.5kJ/mol),并且不被对苯二酚所阻聚。不同配体稀土(钕)催化剂活性次序为:Nd(naph)_3>Nd(P_(507))_3～NdCl_3·6H_2O>Nd(P_(204))_3>Nd(acac)_3·3H_2O,并且,初步揭示了共聚合反应的机理——两种单体形成电荷转移络合物参与增长的配位共聚。
In this paper, the first use of rare earth coordination catalyst NdL_3-A1 (i-Bu) _3, in benzene solvent, 50 ℃ under the styrene-maleic anhydride copolymer, prepared rich in alternating number average molecular weight of up to 6-8.5 × 10 ~ 5 white powder copolymer. The characterization and kinetic behavior of the copolymerization reaction were studied systematically. The copolymerization reaction exhibited low activation energy (10.5 kJ / mol) and was not blocked by hydroquinone. The activity order of Nd (naph) _3> Nd (P_ (507)) _3 ~ NdCl_3 · 6H_2O> Nd (P_ (204)) _3> Nd (acac) _3 · 3H_2O was investigated. Preliminary revealed the mechanism of copolymerization - two kinds of monomers to form charge transfer complexes involved in the growth of coordination copolymerization.