【摘要】 <正> 众所周知,在烯烃络合催化聚合中,过渡金属配位体的种类是影响催化剂活性的重要因素之一.用高分子代替小分子作为配位体,影响催化剂的活性因素则由原来单一的固定因素变成多重的可变因素.高分子金属络合物的结构因素,如金属含量、功能团含量,金属与功能团的含量比都将直接影响催化活性.本文从聚合物的微观结构角度,研究了作为载体的苯乙烯-丙烯酸共聚物中单体单元的序列分布及其与催化活性的关系.更多还原

【Abstract】 The sequence distribution of the monomeric units in the styrene-acrylic acid copolymer has been calculated. The probability of the existence of long sequences of styrene and acrylic acid increases with the increase of the content of the considered monomer in the copolymer respectively. The activity of the polymer-supported metal complexes is related to the distribution function of sequences of different lengths in styrene-acrylic acid copolymers. When the distribution function of long sequence of acrylic acid is higher, the activity of the complexes is low. The complex having nearly equal distribution function of long and short sequences of styrene shows higher activity. The microstructure of polybutadi-ene obtained only relates to the nature of transition metal, and has nothing to do with the distribution of monomeric units in the polymer.更多还原