| 聚酯型脂肪族和芳香族聚氨酯硬段结晶特性对比 |
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| 引用本文： | 任志勇,马德柱,朱琰,余守志,杨惠昌,马德柱.聚酯型脂肪族和芳香族聚氨酯硬段结晶特性对比[J].应用化学,1988,0(3):54. |
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| 作者姓名： | 任志勇 马德柱 朱琰 余守志 杨惠昌 马德柱 |
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| 作者单位： | 河南省化学研究所，河南省化学研究所，河南省化学研究所，河南省化学研究所，河南省化学研究所，中国科技大学应用化学系 郑州，郑州，郑州，郑州，郑州 |
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| 摘 要： | 本文利用DSC、IR、WAXD、PLM和SALS等实验手段,探讨了具有相同软段的聚酯型脂肪族和芳香族聚氨酯硬段结晶特性的差异,发现脂肪族聚氨酯的相分离速率极快,氢键主要在硬段间形成,因而对硬段的结晶过程影响不大;而芳香族聚氨酯的相分离速率较慢,软硬段间又能形成氢键,因而对硬段的结晶起了阻碍作用。
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| 关 键 词： | 聚氨酯 硬段 结晶 相分离 |
| 收稿时间： | 1987-04-03 |
ON THE CRTSTALLIZATION BEHAVIOR OF HARD SEGMENTS IN POLYESTER-BASED ALIPHATIC AND AROMATIC POLYURETHANES |
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| Ren Zhiyong,Ma Dezhu,Zhu Yan,Yu Shouzhi and Yang Huichang.ON THE CRTSTALLIZATION BEHAVIOR OF HARD SEGMENTS IN POLYESTER-BASED ALIPHATIC AND AROMATIC POLYURETHANES[J].Chinese Journal of Applied Chemistry,1988,0(3):54. |
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| Authors: | Ren Zhiyong Ma Dezhu Zhu Yan Yu Shouzhi and Yang Huichang |
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| Abstract: | The methods of DSC, IR, WAXD, PLM and SALS were employed to investigate the differences between the crystallization bahavior of hard segments in the polyester-based aliphatic and aromatic polyurethanes. It is found that the rate of phase separation of aliPhatic polyurethane is higher and the hydrogen bonding is formed mainly between the hard segments, which promotes the crytallizaticn of hard segments, while the rate of phase separation of aromatic polyurethane is very low. Nevertheless, the hydrogen bonding can also be formed betwcen the soft and hard segments, which hinders the crystallization of hard segments. |
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| Keywords: | Polyurethane Hard segments CrYstallisation Phase separation |
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