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小木虫论坛-学术科研互动平台» 学术交流区» 论文翻译 » 论文翻译求助完结子版 » 求翻译一段英文
北京石油化工学院2026年研究生招生接收调剂公告
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qq5391297

铁杆木虫 (著名写手)

[交流] 求翻译一段英文

Two series of N-methylaniline-blocked isocyanates based on monomeric diisocyanates such as 4,4′-methylene bis(phenyl isocyanate), toluene-2,4-diisocyanate, isophorone diisocyanate and 1,6-diisocyanato hexane and their NCO terminated polyurethane prepolymer (polyisocyanates) were prepared and characterized thoroughly by FTIR, 1H NMR, 13C NMR and EI-Mass spectroscopic methods. The blocking reaction of N-methylaniline with aromatic isocyanates and aromatic polyisocyanates occur faster when compared to the aliphatic isocyanates. The deblocking reactions of blocked isocyanates were carried out under dynamic and isothermal conditions using hot-stage FTIR spectrophotometer. The dynamic method was used to determine the deblocking temperature, and the isothermal method was used to calculate kinetics and thermodynamics parameters. Cure reactions of blocked isocyanates with hydroxyl-terminated polybutadiene were also followed to establish the structure–property relationship of the N-methylaniline-blocked isocyanates. The deblocking studies of blocked isocyanates reveal that the aromatic isocyanates undergo deblocking easily compared to aliphatic isocyanates. The rate of deblocking reaction of N-methylaniline-blocked aromatic polyisocyanates was found to be higher compared to N-methylaniline-blocked aromatic monomeric diisocyanate adducts. On the other hand, this trend was just reverse in the cure-reaction studies. The dissolution behavior of N-methylaniline-blocked isocyanates in Terathane-2000, polypropylene glycol-2000, polycaprolactone diol-2000 and hydroxyl-terminated polybutadiene-2500 was also studied and found that all adducts are soluble in these polyols.
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1楼 2011-03-23 22:16:06
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qq5391297

铁杆木虫 (著名写手)
引用回帖:
Originally posted by 568995231 at 2011-03-23 22:27:12:
两种系列N-methylaniline-blocked monomeric异氰酸酯等的基础上,diisocyanates 4′-methylene四苯基异氰酸酯),国际清算银行(4-diisocyanate toluene-2,isophorone,6-diisocyanato二异氰酸酯和1 /环己烷和他们,pol ...

拜托能不能不发百度的翻译啊。。。专业点撒
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3楼2011-03-24 09:32:36
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568995231

新虫 (著名写手)
★ ★ ★ ★ ★
ringzhu(金币-5): 本版严禁机器翻译！ 2011-04-02 12:05:50
两种系列N-methylaniline-blocked monomeric异氰酸酯等的基础上,diisocyanates 4′-methylene四苯基异氰酸酯),国际清算银行(4-diisocyanate toluene-2,isophorone,6-diisocyanato二异氰酸酯和1 /环己烷和他们,polyisocyanates聚氨酯预聚物(兵种)终止有准备,并采用红外光谱表征彻底、核磁共振氢谱、碳谱和EI-Mass光谱方法。N-methylaniline阻断与异氰酸酯反应,芳香的polyisocyanates芳香的速度发生,相比于脂肪族异氰酸酯。异氰酸酯的反应受阻的去进行了等温条件下的动态,利用傅里叶变换红外光谱hot-stage分光光度计。动态的方法被用来确定去温度、等温法计算动力学和热力学参数。异氰酸酯与阻碍的治疗反应摘要p...




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2楼2011-03-23 22:27:12
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yuwang86

木虫 (著名写手)
这个翻译还是可以的
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4楼2011-03-24 10:07:35
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qq5391297

铁杆木虫 (著名写手)
引用回帖:
Originally posted by yuwang86 at 2011-03-24 10:07:35:
这个翻译还是可以的

可以？？我晕。。。这翻译也叫可以？？
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5楼2011-03-24 10:51:35
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