| ~(13)C-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.~(13)C-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(1). |
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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,中国科学院长春应用化学研究所,中国科学院长春应用化学研究所 长春 130022,长春 130022,长春 130022 |
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| 摘 要： | 用~(13)C-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 竞聚率 序列分布 ~(13)C-NMR |
STUDY OF THE MONOMER REACTIVITY RATIOS AND THE SEQUENCE DISTRIBUTION IN BUTADIENE-ISOPRENE COPOLYMERS BY 13C-NMR SPECTROMETRY |
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| GUO Chunling,ZHOU Zinan and 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(1). |
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| Authors: | GUO Chunling ZHOU Zinan and GONG Zhi |
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| Abstract: | Butadiene and isoprene copolymers are prepared with Nd(naph)3-Al(i-Bu)3-Al2Et3Cl3 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 conversions. 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 18C-NMR |
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