| 查看: 883 | 回复: 4 | |||
[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
售SCI一区T0P文章，我:8.O.55.1.O.54,科目齐全,可+急
已经有3人回复
-
售SCI一区T0P文章，我:8.O.55.1.O.5.4,科目全,可+急
已经有3人回复
-
售SCI一区T0P文章，我:8.O55.1.O.54,科目全,可十急
已经有4人回复
-
售SCI一区文章，我:8.O.55.1.O.54,科目齐全,可伽急
已经有3人回复
-
售SCI一区T0P文章，我:8O.55.1.O.54,科目全,可伽急
已经有4人回复
-
售SCI一区文章，我:8.O.55.1.O.54,科目齐全,可伽急
已经有5人回复
-
售SCI一区T0P文章，我:8O.55.1.O.5.4,科目齐全,可+急
已经有3人回复
-
售SCI一区文章，我:8.O.551.O.5.4,科目全,可伽急
已经有3人回复
-
售SCI一区T0P文章，我:8.O.55.1.O54,科目全,可伽急
已经有3人回复
-
售SCI一区文章，我:8O5.5.1.O5.4,科目全,可伽急
已经有4人回复
» 抢金币啦！回帖就可以得到:
-
项目结题验收，希望一切顺利
+1/968
-
江苏师范大学计算化学方向专任教师招聘（事业编）
+3/214
-
武汉大学超分子化学与材料课题组招收博士、博后和科研助理(有机、框架或超分子背景)
+1/200
-
大连理工大学大连市复杂工业场景具身智能重点实验室科研助理招聘启事
+2/172
-
急招科研助理/博士后
+2/164
-
招收 哈工大深圳﹣大湾区大学联合培养博士生1名，2027年入学
+1/94
-
美国肯塔基大学Dr. Sheng Tong博士后招聘（空间可控的基因组编辑与肿瘤免疫治疗）
+1/94
-
【征稿】Springer Nature热电专题 Discover Materials / Discover Chemistry
+1/32
-
来，到深技大读研究生！2027 期待与你 共创不凡!
+1/16
-
Biofunctional Materials青年编委全球招募，邀您共建学术阵地！
+1/15
-
聚智生物材料，共赴学术新程｜Biofunctional Materials青年编委全球招募
+1/9
-
哈尔滨工业大学（深圳）吴晓军教授课题组招收2027级“申请-考核”博士研究生
+2/8
-
专利怎么申请呀？有没有老师帮忙
+1/7
-
怀柔实验室与中国矿业大学（北京）氢能与燃料电池课题组招收2027年联培博士生
+1/6
-
中国石油大学（华东）生物质绿色化学转化和生物基功能高分子团队诚招27级推免生
+1/5
-
【推免招生】招收材料、化工、环境、冶金类推免生
+1/4
-
浙江大学Kemal Celebi教授课题组招收2027年秋季博士生
+1/3
-
无人机方向 博士后与青年教师招聘公告
+1/3
-
口腔特刊客座招募客编Biofunctional Materials牙科生物功能材料专题，Scopus期刊
+1/2
-
北京理工大学-集成电路与电子学院杰青团队-招博士后
+1/2
★ ★ ★ ★ ★
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
4楼2011-03-24 10:07:35
5楼2011-03-24 10:51:35
