| 异氰酸酯功能单体的封闭与解封闭 |
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| 引用本文： | 丁永涛,赵同阳,王鸷,夏尚文,孙玉婷,王素环,阚成友.异氰酸酯功能单体的封闭与解封闭[J].精细石油化工,2008,25(6). |
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| 作者姓名： | 丁永涛 赵同阳 王鸷 夏尚文 孙玉婷 王素环 阚成友 |
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| 作者单位： | 1. 烟台大学化学生物理工学院,山东,烟台,264005
2. 清华大学化学工程系,北京,100084 |
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| 基金项目： | 国家自然科学基金，山东省科技厅博士基金，山东省高等学校优秀青年教师国内访问学者资助课题 |
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| 摘 要： | 用己内酰胺作封闭剂,研究了(3-异氰酸酯基-4-甲基)苯氨基甲酸-2-丙烯酯(TAI)功能单体的封闭和解封闭。用化学滴定法和傅里叶变换红外光谱表征封闭反应前后异氰酸酯基的变化情况,采用热失重分析确定封闭产物的解封闭温度。结果表明,封闭的最佳条件为:反应温度80℃,n(封闭剂):n(单体)=1.1:1,反应时间4～5 h,封闭率可达97%。解封闭反应起始温度为160℃,异氰酸酯解封闭速率最快时所对应的温度为200℃。
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| 关 键 词： | 异氰酸酯 己内酰胺 对(3-异氰酸酯基-4-甲基)苯氨基甲酸-2-丙烯酯 封闭 解封闭 |
BLOCKING AND DEBLOCKING OF ISOCYANATE FUNCTIONALIZED MONOMER |
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| Ding Yongtao,Zhao Tongyang,Wang Zhi,Xia Shangwen,Sun Yuting,Wang Suhuan,Kan Chengyou.BLOCKING AND DEBLOCKING OF ISOCYANATE FUNCTIONALIZED MONOMER[J].Speciality Petrochemicals,2008,25(6). |
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| Authors: | Ding Yongtao Zhao Tongyang Wang Zhi Xia Shangwen Sun Yuting Wang Suhuan Kan Chengyou |
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| Abstract: | Allyl(3-isocyanate-4-tolyl)carbamate(TAI)was blocked by ε-caprolactam.Chemical titra- tion and FTIR were employed to characterize the isocyanate group content before and after blocking. Thermal gravity analysis was used to determine the deblocking temperature of the blocked product. The results showed that the optimum blocking temperature and time is 80℃ and 4-5 h,respectively. The optimum mole ratio of ε-caprolactam to TAI is 1.1:1.The deblocking temperature for initial and maximum rate is 160℃ and 200℃,respectively. |
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| Keywords: | isocyanate caprolactam allyl(3-isocyanate-4-tolyl)carbamate block deblocking |
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