| α-Ti(HPO4)2微球负载型催化剂的合成及其烯烃聚合催化性能 | |
| Spherical α-Ti(HPO4)2 Supported Catalysts:Synthesis and Catalytic Properties in Olefin Polymerizations | |
| 摘要: 2种茂金属催化剂及1种后过渡金属催化剂分别被固载于经过甲基铝氧烷处理后的α-Ti（HPO4）2微球表面，制备得到3种微球负载型催化剂。在烯烃聚合反应过程中，3种负载型催化剂均表现出比硅胶负载型催化剂更高的催化活性。2种茂金属负载型催化剂在乙烯、丙烯聚合反应中的活性分别高达6.8×107 gPE·（molZr·h）-1和5.0×107 gPP·（molZr·h）-1，所产生的烯烃聚合产物分子量分布较窄（Mw/Mn<2.3），表现出良好的单中心催化特性，而且丙烯聚合产物的等规度高达96.5%。负载型后过渡金属催化剂在乙烯聚合反应中的活性稍低，但也能够达到8.3×106 gPE·（molFe·h）-1。3种负载型催化剂催化烯烃聚合产物均成微球型，能够很好地复制载体的形貌。 | |
| 关键词: α-Ti(HPO4)2 球型 茂金属 后过渡金属催化剂 烯烃聚合 | |
| 基金项目: 国家自然科学基金（No.U1362113）资助项目 | |
| Abstract: Two metallocene catalysts and one late transition metal catalyst were immobilized respectively on the surface of spherical α-Ti(HPO4)2 treated with methylaluminoxane. All the supported catalysts have higher activities than those of their referenced silica supported catalysts in olefin polymerizations. The activities of α-Ti(HPO4)2 supported metallocene catalysts in ethylene and propylene polymerizations are up to 6.8×107 gPE·(molZr·h)-1 and 5.0×107 gPP·(molZr·h)-1. These supported catalysts can produce narrow molecular weight distribution polyolefins (Mw/Mn<2.3) and polypropylene with high isotactic index (96.5%). The late transition metal catalyst supported on α-Ti(HPO4)2 has relatively less activity (8.3×106 gPEFe·h)-1) in ethylene polymerization but the produced polyethylene has a very broad Mw/Mn (>19). The particles of the produced polyolefins are mainly ball-shaped which replicate the morphology of spherical α-Ti(HPO4)2. | |
| Keywords: α-Ti(HPO4)2 spherical metallocene late transition metal catalyst olefin polymerization | |
| 投稿时间：2017-07-21 修订日期：2017-09-06 | |
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| 袁苑,义建军,石于坚,徐庆红.α-Ti(HPO4)2微球负载型催化剂的合成及其烯烃聚合催化性能[J].无机化学学报,2017,33(12):2329-2337. | |
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