2) nucleophilic reaction
亲核取代
1.
Polyether ether ketones are prepared by the nucleophilic reaction of hydroquinone with 4,4'-difluorodibenzophenone using diphenylsulfone as solvent in the presence of anhydrous K_2CO_3/Na_2CO_3;the effect of the reaction temperature on molecular weights is discussed.
采用付氏烷基化法,以氟苯、四氯化碳为原料,无水三氯化铝为催化剂,合成单体4,4’-二氟二苯甲酮;再以二苯砜为溶剂,在无水碳酸钾/碳酸钠的催化下,通过对苯二酚与4,4’-二氟二苯甲酮进行亲核取代反应,合成了聚醚醚酮(PEEK),并探讨了反应温度对相对分子质量的影响。
2.
Polyether ether ketones were prepared by the nucleophilic reaction of hydroquinone with 4,4'-difluorobenzophenone using diphenylsulfone solvents in the presence of anhydrous K_2CO_3/Na_2CO_3,of which inherent viscosity was 0.
以二苯砜为溶剂,在无水碳酸钾/碳酸钠的催化下,通过对苯二酚与4,4'-二氟二苯甲酮进行亲核取代反应,合成了特性黏度为0。
3.
Polyether ether ketone ketone was prepared by the nucleophilic reaction of hydroquinone with 1,4-bis (4-fluorbenzoyl)-benz.
以二苯砜为溶剂,在无水碳酸钾/碳酸钠的催化下,以P,P-BFB为单体与对苯二酚进行亲核取代反应合成了特性粘度为0。
3) nucleophilic substitution
亲核取代
1.
Significantly enhanced reactivities of the nucleophilic substitution reactions induced by microwaves in ionic liquids;
离子液体作为微波吸收剂用于促进亲核取代反应
2.
Solvent's Influence on Nucleophilic Substitution Reaction's Rate;
溶剂对亲核取代反应速率的影响
3.
The nucleophilic substitution reaction of 2-aryloxyl-4-chloro pyrimidy with sodium allylalconol;
烯丙醇钠对2-芳氧基-4-氯嘧啶的亲核取代反应
4) Mononuclear extraction
单核萃取
5) nucleus orientation
晶核取向
1.
The relationship of diamond nucleation probability, nucleus orientations and film adhesion with structure ad properties was investigated.
分析了CVD金刚石薄膜的界面能量情况,并由此研究了金刚石成核几率、晶核取向、附着强度与基底材料结构和性能的关
补充资料：核取
1.考核选取。
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参考词条