| 查看: 846 | 回复: 4 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[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. |
回复此楼» 猜你喜欢
面上项目filecode邪修
已经有4人回复
-
2026国自然放榜时间
已经有4人回复
-
关于代码变化问题，想知道的进来
已经有22人回复
-
应该是93bebmhtak前后十一个字符比较关键
已经有13人回复
-
这样的filecode谁见过
已经有21人回复
-
filecode与中标关系的预测
已经有5人回复
-
fileCode有新解读？
已经有18人回复
-
关于filecode，很负责任的告诉大家
已经有7人回复
-
【2027博士申请】纳米药物递送方向
已经有5人回复
-
关于豆爷回答的JTJC与%2F数量
已经有7人回复
» 抢金币啦！回帖就可以得到:
-
祈福
+5/500
-
北京理工大学集成电路学院-柔性电子器件与智造研究所-2027级博士招生
+1/474
-
发榜前的“心理过山车”：你经历了吗？
+5/270
-
1,3,2-Dioxaphospholane, 2-(2,2,2-trifluoroethoxy)-
+1/87
-
1,3,2-Dioxaphospholane, 2-(2,2,3,3,3-pentafluoropropoxy)-
+1/86
-
3,4-二(三甲基硅氧基)-1-丁烯（CAS：89543-84-0）
+1/86
-
三(三甲基硅基)硼酸酯（CAS：4325-85-3）
+1/86
-
1-甲基-1,2-双(三甲基硅氧基)乙烷（CAS：17887-27-3）
+1/85
-
三(三甲基硅烷)磷酸酯（CAS：10497-05-9）
+1/83
-
具身智能机器人公司招聘硬件工程师岗位 预算100万内
+1/79
-
哈尔滨工业大学郑州高等研究院查正宝研究员招收博士/硕士
+1/29
-
哈工大（深圳）何自开团队诚招2027级化学工程与技术专业博士生
+1/27
-
浙江大学医学院附属第一医院招聘科研助理
+1/17
-
高耐腐蚀性的镁合金微弧氧化工艺
+1/12
-
澳大利亚 Murdoch University 全奖博士招生（3个名额）地质化工冶金领域
+1/10
-
福建师范大学海峡柔性电子学院-2027年9月入学博士-考核制-电催、能源
+1/7
-
中山大学计算数学方向招2027届考核制博士生
+1/5
-
夏尽秋来，蓄力沉淀，静待硕果成文
+1/4
-
北京理工大学-集成电路与电子学院杰青团队-招博士后
+1/3
-
北京理工大学-集成电路与电子学院杰青团队-招博士后
+1/1
4楼2011-03-24 10:07:35
★ ★ ★ ★ ★
ringzhu(金币-5): 本版严禁机器翻译！ 2011-04-02 12:05:50
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... 仅供参考 |
2楼2011-03-23 22:27:12
3楼2011-03-24 09:32:36
5楼2011-03-24 10:51:35
