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- Keywords poly（aryl ether ketone ether ketone ketone）;bis（o-methyl） moiety;electrophilic polycondensation;property and structure; 聚醚酮醚酮酮;双邻位甲基侧基;共聚;结构与性能;
- Keywords poly（aryl ether sulfone ether ketone ketone）;bis（o-methyl） moiety;electrophilic polycondensation;properties and structure; 聚芳醚砜醚酮酮;双邻位甲基;低温溶液缩聚;结构和性能;
- electrophilic polycondensation 共聚
- Poly(PEG(1)-adipic anhydride(2)) was synthesized by melt polycondensation. 采用熔融缩聚法合成了PEG(1)-己二酸酐(2)聚合物。
- Polycondensation catalyst may has bad effect on polyester afterprocessing properties. 缩聚催化剂会对聚酯后加工性能产生不良影响。
- It is very difficult to sulfonate PES by electrophilic aromatic substitution reaction. 同时通过改变氯磺酸与聚醚砜的摩尔比,可以对反应进行控制。
- Markovnikov's rule is an important rule of product forecasting in alkene electrophilic addition reaction. 马氏规则是在烯烃的亲电加成反应中预测产物的重要经验规则,然而它通常的表述有一定的局限性。
- Synthesis of the substance from aniline and hexafluoroacetone involves electrophilic addition,acylation and reduction. 其合成一般是以苯胺和六氟丙酮为起始原料,经过亲电加成、酰化和还原三步反应。
- Electrophilic aromatic substitution takes place at C5 requiring Activating groups. 在有活化基的情况下可以在C5发生亲电芳香取代反应。
- It will become deepen to the students' recognization in mechanism of Aryl electrophilic substitution. 这些问题的讨论将深化学生对芳烃亲电取代反应机理的认识。
- The rate constants of radical and electrophilic addition to alkenes are dominated by different factors. 烯烃的自由基加成和亲电加成速率受不同的因素控制。
- The aromatic electrophilic substitution reaction was studied using NMR for the first time. 首次采用NMR研究芳基亲电取代反应。
- Benzene undergoes metabolic oxidation by cytochrome P450 enzymes to form an electrophilic epoxide which can alkylate protein and DNA. 苯在细胞色素P450酶氧化代谢下，形成一种能烷化蛋白质和DNA的电环氧化物。
- A novel furan resin was synthesized by polycondensation between furfuralcohol and furfural. 用糠醇和糠醛缩聚制备了新型呋喃树脂。
- By comparing VNS with the electrophilic substitution and nucleophilic substitution of nitro aromatic, the definition of VNS is explained. 通过对竞比实验、速控步骤和动力学同位素效应的分析,解释了VNS的反应机理;
- When the tautomer DTP(1,3,7) reacts with the electrophilic carcinogen BPDE,the atomic S10 of DTP(1,3,7) superiorly attacks the BPDE. 二硫酮DTP(1;3;7)在水相中与致癌物BPDE进行亲核取代反应时;二硫酮DTP(1;3;7)中的S10原子优先进攻亲电试剂BPDE.
- It is mainly synthesized by two chemical ways: ring-opening polymerization and direct polycondensation. 合成聚苹果酸的化学方法主要有开环聚合法与直接聚合法。
- The N-methyl-2-pyrrolidone is chosen as polycondensation media and toluene as carrier of water. 选择N-甲基-2-吡咯烷酮为反应介质,甲苯为带水剂。
- The results showed that ester-amide exchange，alcoholysis and polycondensation were primary reactions. 结果表明：主要反应为酯-酰胺交换、醇解和缩聚反应；
- The results show that ester-amide exchange,alcoholysis and polycondensation are ... 缩聚时间越长,产品黏度越大,软化点越高。
