| 13C-NMR研究丁二烯-异戊二烯共聚合的竞聚率和共聚物的序列分布 |
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| 引用本文： | 郭春玲,周子南,龚志. 13C-NMR研究丁二烯-异戊二烯共聚合的竞聚率和共聚物的序列分布[J]. 高分子学报, 1991, 0(1): 77-83 |
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| 作者姓名： | 郭春玲 周子南 龚志 |
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| 作者单位： | 中国科学院长春应用化学研究所 |
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| 摘 要： | 用13C-NMR方法研完了不同配料比的丁二烯-异戊二烯本体共聚和溶液共聚物的结构,定量计算出了共聚物二元组的浓度和数均序列长度,采用T(?)DO″S法计算出了本体共聚和溶液共聚的竞聚率,并证明各种共聚产物的序列分布都服从一级Markov统计模型。
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| 关 键 词： | 丁二烯 异戊二烯 共聚合 竞聚率 |
| 收稿时间： | 1989-09-10 |
STUDY OF THE MONOMER REACTIVITY RATIOS AND THE SEQUENCE DISTRIBUTION IN BUTADIENE-ISOPRENE COPOLYMERS BY 13C-NMR SPECTROMETRY |
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| GUO Chun-ling,ZHOU Zin-an,GONG Zhi. STUDY OF THE MONOMER REACTIVITY RATIOS AND THE SEQUENCE DISTRIBUTION IN BUTADIENE-ISOPRENE COPOLYMERS BY 13C-NMR SPECTROMETRY[J]. Acta Polymerica Sinica, 1991, 0(1): 77-83 |
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| Authors: | GUO Chun-ling ZHOU Zin-an GONG Zhi |
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| Affiliation: | Changchun Institute of Applied Chemistry; Academia Sinica; Changchun 130022 |
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| Abstract: | Butadiene and isoprene copolymers are prepared with Nd(naph)3-Al(i-Bu)3-Al2Et3Cl3<.sub> catalytic system in bulk and solution polymerization.The sequence structures of the copolymers are determined by 13C-NMR spectrometry. The dyad distribution, composition and number-average sequence length of these copolymers are calculated on the basis of assignment of 13C-NMR spectra. Meanwhile, the monomer reactivity ratios are obtained by using TUDO"S' method which is proper to various copolymerization systems even at high conver-sions. The results of calculations are discussed. It is known that the sequence distribution of monomer units in all copolymers follows first-order Markov statistical model. |
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| Keywords: | Copolymerization of butadiene-isoprene Sequence distribution Monomer reactivity ratio 13C-NMR.')" href=" #" >13C-NMR. |
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