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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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(P^N^P)钴配合物/倍半氯化乙基铝催化苯乙烯聚合的研究
DOI: 10.11777/j.issn1000-3304.2014.14030, PP. 1392-1397
Keywords: 钴配合物,含氮双膦配体,苯乙烯,聚合
Abstract:
采用含氮双膦配体与无水氯化钴反应可制得一系列相应的(P^N^P)钴配合物,并研究了该系列钴配合物对苯乙烯聚合的催化性能.在助催化剂倍半氯化乙基铝(EASC)的活化下,该系列钴配合物对甲苯中的苯乙烯溶液聚合表现出高的催化活性(可达5.44×105g(PS)·mol-1(Co)·h-1).通过对不同苯乙烯单体用量、助催化剂用量(Al/Co摩尔比)、聚合温度以及催化剂的配体环境等的研究,详细考察了这些因素对聚合反应和聚合产物性能的影响.通过凝胶渗透色谱法(GPC)和核磁共振碳谱(13C-NMR)表征了所得聚合产物的分子量及分子量分布和微观结构,分析结果表明,所得聚苯乙烯具有较低的分子量(Mn=2000~5900)和较窄的分子量分布(1.75~2.05),其微观结构是无规的.
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