1) end blocking
端基封闭
2) blocking end group
端基封闭
3) end groups
端基
1.
Theoretical design of high-spin biradical molecules with heterocycles as end groups;
以杂环做端基的高自旋双自由基分子的理论研究
4) end group
端基
1.
The results show that the dendrimers of ester as end group have visbreaking effect on the crude oil.
5代树状长链酯对原油的降黏性能,分析了树状大分子的端基结构对原油降黏性能的影响。
2.
Methoxy or methacrylic end groups were prepared,upon reacting the residual NCO moiety with either methanol or hydroxyethylmethacrylate.
NCO和OCH3为端基的PU构成的复合乳液GPC谱图都呈现两个峰,DSC和FT-IR分析发现,复合后增加了PU软段和硬段相分离的程度。
3.
Four open chain crown ethers using parahydroxylbenzaldehyde,β-aminoacid schiff base as end group were snythesized by the condensation of polyethylene glycol bridged diarylaldehyde with orthoaminobenzoic acid.
以多缩乙二醇桥连二芳醛与邻氨基苯甲酸的缩合合成了4种以对羟基苯甲醛、β—型氨基酸Schiff碱为端基的开链冠醚,并用IR、1HNMR和MS谱,确证了它们的结构。
5) Terminal group
端基
1.
Study on synthesis and properties or noncyclic crown ethers with phenyl thiocarbamide acetic acids as terminal groups;
以苯硫脲基乙酸为端基的开链冠醚的合成及其性质研究
2.
Three noncyclic crown ethers with 1 phenyl 3 benzoyl thiocarbamide as terminal groups were synthesized by treating diaromatic amides bridged in noncyclic crown ether with benzoyl isothiocyanate by refluxing acetone.
由苯甲酰基异硫氰酸酯、开链冠醚桥连二芳胺合成了３种以１－苯基－３－苯甲酰基硫脲为端基的开链冠醚，并用ＩＲ，１ＨＮＭＲ，ＭＳ等谱验证了其结构，初步试验了其与部分金属离子的络合性
6) end-group titration
端基滴定
1.
The determination of polymerization degree of ammonium polyphosphate by end-group titration;
端基滴定法测定聚磷酸铵聚合度
2.
Conclusion was made by comparing with the test result of nuclear magnetic resonance spectroscopy:the end-group titration is only suitable for testing average degree of polymerization of ammonium polyphosphate product with high water dissolvability and not suitable for produc.
根据端基滴定测试聚磷酸铵平均聚合度的方法,从交换过程、交换产物、滴定过程进行讨论,以及与核磁共振方法测定结果比较,认为聚磷酸铵平均聚合度的测试方法——端基滴定法只适宜测定水溶性的聚磷酸铵产品平均聚合度,对于水溶性差且平均聚合度大的聚磷酸铵产品用端基滴定法测定平均聚合度是不可行的。
参考词条
补充资料：端基封闭
分子式：
CAS号：
性质：聚酯、聚醚、聚酰胺等线型高分子的两端存在羧基或羟基或氨基等官能团，这些官能团在适宜的条件下仍能起反应。加入少量单官能团的物质，将端基的官能团反应掉，称为端基封闭。如端羧基能与环己醇或异戊醇反应；端羟基用醋酐或苯甲酸反应；氨基用苯甲酸封端。能起封端作用的单官能团物质称为封端剂。
CAS号：
性质：聚酯、聚醚、聚酰胺等线型高分子的两端存在羧基或羟基或氨基等官能团，这些官能团在适宜的条件下仍能起反应。加入少量单官能团的物质，将端基的官能团反应掉，称为端基封闭。如端羧基能与环己醇或异戊醇反应；端羟基用醋酐或苯甲酸反应；氨基用苯甲酸封端。能起封端作用的单官能团物质称为封端剂。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。