近年来由于立体定向聚合方法的确立,包括阴离子型配位絡合物和其他类型的催化剂,从α-烯类单体合成一系列新型的立体結构規整的聚合物,取得了很大的成就。尽管单体单元的化学結构并沒有改变,但是这类聚合物的分子鏈結构具有高度规整的构型,容易結晶,因此带来一系列优异的性能,如熔点高和熔点范围笮、溶解度低、高机械强度和硬度以及抗热性等。从α-烯类单体聚合而得的高分子鏈中,由于不对称碳原子的存在使单体单元在高分子鏈上的排列带来不規則性,因为取代基R可以任意地排列在高分子鏈两侧构成d型或l型,若不对称碳原子能按一定的空间排列,呈d-d-d-d…或l-l-l-l…的全d型或全l型,或d,l交替排列的規整結构,統称为有规立构, In recent years, great achievements have been made in the synthesis of a series of novel stereostructured polymers from α-olefin monomers due to the establishment of stereospecific polymerization methods, including anionic coordination complexes and other types of catalysts. Although the chemical structure of monomer units has not changed, the molecular chain structure of such polymers has a highly regular configuration and is easy to crystallize, thus resulting in a series of excellent properties such as high melting point and melting point range, low solubility, High mechanical strength and hardness and heat resistance. In the polymer chain obtained by polymerizing an α-olefin monomer, the arrangement of the monomer units in the polymer chain is irregular due to the presence of an asymmetric carbon atom because the substituent R can be arbitrarily arranged in a high If the asymmetric carbon atoms can be arranged in a certain space, the whole d-type or all-l-type, or d, l regular structures with alternating dddd ... or llll ... are alternately arranged in the form of d-type or l-type. Regulatory structure,