| 1. | Impurities that promote deterioration of polymers can be foreign materials, such as residues from polymerization catalysts .
促使聚合物劣化的杂质可能是外加的物质，如残存的聚合用催化剂。 |
| 2. | A new recombination of polymerization catalyst
一种新的复合型聚合催化剂 |
| 3. | Nickel - based olefin polymerization catalysts are new - type catalysts , which have been attracted much attention in recent years
镍系烯烃聚合催化剂是近年来受到广泛关注的一类新型催化剂，是配位催化研究的热点之一。 |
| 4. | Nickel - based olefin polymerization catalysts are new - type catalysts , which have been attracted much attention in recent years
摘要镍系烯烃聚合催化剂是近年来受到广泛关注的一类新型催化剂，是配位催化研究的热点之一。 |
| 5. | In the present review , the discovery , development , the polymerization characteristics and the most significant studies on the nickel - based olefin polymerization catalysts are reported
本文介绍了镍系烯烃聚合催化剂的发现和研究概况，并评述了聚合特性及最新研究进展。 |
| 6. | This paper reviewed latest researches in internal donors in ziegler - natta propylene polymerization catalysts , as well as the features of different internal donors ( monoesters , diesters , diethers , diketones and diol esters )
摘要对丙烯聚合齐格勒纳塔催化剂内给电子体的研究进展进行了综述，同时分析了单酯类、双酯类、二醚类、二酮类和二醇酯类化合物作为内给电子体催化剂的特性。 |
