A oligoamide with pyrazoline segment was designed and synthesized.Its structure was identified by IR,MS and 1HNMR.Fluorescence property of the target compoud in solution(DMF) was studied.The results showed that the st...A oligoamide with pyrazoline segment was designed and synthesized.Its structure was identified by IR,MS and 1HNMR.Fluorescence property of the target compoud in solution(DMF) was studied.The results showed that the strongest emission peak was at 442nm and the half peak width was 64nm and the fluorescence quantum yield(Φ) was 73.9%,which enhanced 13% compared to the simple pyrazoline structural unit′s Φ.展开更多
This paper is dealt with the process, properties, improvement of color and hardening speed. appli-cations of 65o type lower molecular Polyamide resin. The resin are Producted by 200t/a.
以碳链长度为10的癸二酸与TEPA(四乙烯五胺)反应制备出LMPA(低分子聚酰胺)环氧固化剂,考察了反应条件对LMPA黏度和胺值的影响。研究结果表明:最佳反应条件为反应时间2 h、反应温度200℃、反应配比为n(胺)∶n(酸)=3∶1,此时LMPA胺值为745...以碳链长度为10的癸二酸与TEPA(四乙烯五胺)反应制备出LMPA(低分子聚酰胺)环氧固化剂,考察了反应条件对LMPA黏度和胺值的影响。研究结果表明:最佳反应条件为反应时间2 h、反应温度200℃、反应配比为n(胺)∶n(酸)=3∶1,此时LMPA胺值为745 mg KOH/g,黏度为3.172 Pa·s。使用Kissinger法、Flynn-Wall-Ozawa法计算出LMPA/E-51固化反应活化能分别为41.53 k J/mol、45.44 k J/mol,使用Crane方程计算出反应级数为0.95。T-β外推法计算得出体系的凝胶温度、固化温度及后固化温度分别为41.83、80.29和111.93℃。展开更多
文摘A oligoamide with pyrazoline segment was designed and synthesized.Its structure was identified by IR,MS and 1HNMR.Fluorescence property of the target compoud in solution(DMF) was studied.The results showed that the strongest emission peak was at 442nm and the half peak width was 64nm and the fluorescence quantum yield(Φ) was 73.9%,which enhanced 13% compared to the simple pyrazoline structural unit′s Φ.
文摘This paper is dealt with the process, properties, improvement of color and hardening speed. appli-cations of 65o type lower molecular Polyamide resin. The resin are Producted by 200t/a.
文摘以碳链长度为10的癸二酸与TEPA(四乙烯五胺)反应制备出LMPA(低分子聚酰胺)环氧固化剂,考察了反应条件对LMPA黏度和胺值的影响。研究结果表明:最佳反应条件为反应时间2 h、反应温度200℃、反应配比为n(胺)∶n(酸)=3∶1,此时LMPA胺值为745 mg KOH/g,黏度为3.172 Pa·s。使用Kissinger法、Flynn-Wall-Ozawa法计算出LMPA/E-51固化反应活化能分别为41.53 k J/mol、45.44 k J/mol,使用Crane方程计算出反应级数为0.95。T-β外推法计算得出体系的凝胶温度、固化温度及后固化温度分别为41.83、80.29和111.93℃。
