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Processes for correlating UV-VIS spectra of norbornene compound to polymerization processes using the same, and related purification methods and compositions
Processes for correlating UV-VIS spectra of norbornene compound to polymerization processes using the same, and related purification methods and compositions
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机译:使降冰片烯化合物的UV-VIS光谱与聚合反应相关的方法,以及相关的纯化方法和组合物
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摘要
The invention provides a process of polymerizing ethylene and at least one α-olefin, said process comprises polymerizing the ethylene and the at least one α-olefin in the presence of 5-ethylidene-2-norbornene, which comprises low levels of impurities, as determined by the absorbances at the following wavelengths: 320 nm and 343 nm. The invention also provides a method of increasing the catalysts efficiency, and a method of determining the expected catalyst efficiency, each in a polymerization of ethylene and at least one α-olefin in the presence of the 5-ethylidene-2-norbornene, which comprises low levels of impurities, as determined by the absorbances at the above wavelengths. The invention further provides a method of purifying 5-ethylidene-2-norbornene to form a purified 5-ethylidene-2-norbornene, which comprises low levels of impurities, as determined by the absorbances of the above wavelengths.
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