| 双[N,O]配体合镍催化剂/MAO催化MMA聚合的研究 |
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| 引用本文： | 陈晓丽,祝方明,林尚安.双[N,O]配体合镍催化剂/MAO催化MMA聚合的研究[J].高分子学报,2007(11):1064-1068. |
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| 作者姓名： | 陈晓丽 祝方明 林尚安 |
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| 作者单位： | 中山大学化学与化学工程学院高分子研究所,广州,510275 |
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| 基金项目： | 国家自然科学基金
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广东省自然科学基金 |
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| 摘 要： | 合成了双水杨醛(对硝基苯)亚胺]合镍催化剂A和双水杨醛(对甲氧基苯)亚胺]合镍催化剂B.该两种双N,O]配体合镍配合物/MAO催化体系能有效地催化极性单体甲基丙烯酸甲酯(MMA)聚合,催化活性可高达105gPMMA/(molNi.h).其中配体对位含有硝基吸电子(共轭)效应的催化剂A/MAO体系有相对较高的聚合反应热稳定性,温度达50℃时仍具有高催化活性.配体对位含有甲氧基推电子(共轭)效应的催化剂B/MAO则在30℃和Al/Ni摩尔比为600时表现出最高的催化活性.催化剂B/MAO体系催化得到PMMA的链序列结构以间规为主(含高达73.2%rr三元组),具有较高的玻璃化转变温度(Tg=106.4℃).
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| 关 键 词： | 水杨醛亚胺 双[N O]配体合镍催化剂 聚甲基丙烯酸甲酯 |
| 修稿时间： | 2007-01-23 |
POLYMERIZATION OF METHYL METHACRYLATE BY NICKEL CATALYST WITH BIS(N,O) LIGANDS IN THE PRESENCE OF MAO COCATALYST |
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| CHEN Xiaoli,ZHU Fangming,LIN Shang'an.POLYMERIZATION OF METHYL METHACRYLATE BY NICKEL CATALYST WITH BIS(N,O) LIGANDS IN THE PRESENCE OF MAO COCATALYST[J].Acta Polymerica Sinica,2007(11):1064-1068. |
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| Authors: | CHEN Xiaoli ZHU Fangming LIN Shang'an |
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| Institution: | Institute of Polymer Science, School of Chemistry and Chemical Engineering Zhongshan University, Guangzhou 510275 |
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| Abstract: | Two novel nickel complexes of bisN-(4-nitrophenyl)salicylaldiminate]nickel(Ⅱ)A and bisN-(4-methoxyphenyl)salicylaldiminate]nickel(Ⅱ)B weresynthesized.These new type bis(N,O)chelated nickel complexes/MAO catalysts are effective to catalyze polymerization of polar monomer methyl methacrylate(MMA).The A system which contains p-nitro substitution groups on the ligand having electron attractive effect exhibits better activity than B at higher polymerization temperature(50℃).At the polymerization conditions,T_p=30℃;Al/Ni=600,the B system shows the best activity.The chain sequence distribution of PMMA obtained with B systems is 73.2% rr triads as determined by 13C-NMR,and the glass-transition temperature(T_g)is up to 106.4℃ by DSC measurements. |
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| Keywords: | Salicylaldimine Nickel catalyst with bis(N O)ligands PMMA |
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