| 嵌段聚氨酯脲的序列分布研究 |
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| 引用本文： | 修玉英,王得宁.嵌段聚氨酯脲的序列分布研究[J].华南理工大学学报(自然科学版),1994,22(6):94-98. |
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| 作者姓名： | 修玉英 王得宁 |
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| 作者单位： | 华南理工大学材料科学研究所，华东理工大学材料科学研究所 |
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| 摘 要： | 用高分辩１３ＣＮＭＲ技术研究了不同硬段浓度的聚醚型嵌段聚氨酯脲（ＰＵＵ）弹性体的序列长度和序列分布。结果表明，ＰＵＵ的硬段平均序列长度随ＰＵＵ中聚脲的摩尔浓度增加而增加；嵌段ＰＵＵ内软硬段的链结构也随聚脲摩尔浓度的增加由交替共聚向嵌段共聚变化，硬段浓度愈高，嵌入的硬段长度也愈大。
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| 关 键 词： | 嵌段共聚物 NMR PUU 聚氨酯脲 |
STUDY ON THE SEQUENCE DISTRIBUTION OF SEGMENTED POLYURETHANEUREA |
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| Xiu Yuying, Luo Zhongru, bang Dening, Zhang Zhiping, Ying Shengkang.STUDY ON THE SEQUENCE DISTRIBUTION OF SEGMENTED POLYURETHANEUREA[J].Journal of South China University of Technology(Natural Science Edition),1994,22(6):94-98. |
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| Authors: | Xiu Yuying Luo Zhongru bang Dening Zhang Zhiping Ying Shengkang |
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| Abstract: | Segmented Polyurethaneureas (PUUs) were prepared from linear poly(Propylene oxide) polyether, 4, 4 '-diphenylmethane diisocyanate (MDI) anddiethyltoluene diamine (DETDA) by the two-step solution polymerhation. 13C NMRspectra of the PUUs were measured and the mean sequence lengths ofpolyurethane block and polyurea block were estimated from the signals ofaromatic carbons. The mean sequence lengths of hard segments increased withthe increasing molar fraction of polyurea. Also, the blockness increased withthe increasing hard segment concentration. |
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| Keywords: | s: polyurethane sequences block copolymers nuclear magneticresonance |
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