1) SOCl 2/TiCl 4 initiating system
SOCl2/TiCl4引发体系
2) Sm/TiCl_4 system
Sm/TiCl4体系
1.
The vicinal dibromides of α,β-unsaturated carboxylic acid derivatives were debrominated with Sm/TiCl_4 system to afford the corresponding cinnamic acid derivatives in good yields under mild conditions.
例如,Sm/TiCl4体系可以促进烷基硫氰酸酯[2]或烷基硫代硫酸钠[3]生成烷基二硫醚;可以促进亚砜脱氧变成硫醚[4]。
3) initiation system
引发体系
1.
In order to overcome the defects of expensive Ce4+ salt and the difficulty in industrial application,the influence of the initiator concentration,the dosage of acrylonitrile and temperature on the ration and efficiency of grafting was studied with Fe~(2+)-H_2O_2 initiation system, assessing the grafting ratio and grafting efficiency as the evaluation index.
为克服引发剂铈盐较昂贵,工业应用难的缺点,实验采用Fe2+-H2O2引发体系引发丙烯腈接枝改性淀粉,采用接枝率和接枝效率作为评价接枝效果的指标,详细研究了接枝的工艺及其引发剂浓度、丙烯腈单体的用量和接枝温度对接枝率和接枝效率的影响。
2.
The influence of the concentration of the initiator ,the dosage of acrylonitrile and grafting temperature on the grafting ratio and the grafting efficiency were researched with CAN-KPS initiation system for overcoming the defects of expensive Ce4+and difficulty in industrial application,acting the grafting ratio and the grafting efficiency as the evaluation index.
为克服引发剂铈盐较昂贵,工业应用难的缺点,实验采用CAN-KPS复合引发体系引发丙烯腈接枝改性淀粉,采用接枝率和接枝效率作为评价接枝效果的指标,详细研究了接枝工艺及其引发剂浓度、丙烯腈单体的用量和接枝温度对接枝率和接枝效率的影响,结果表明:接枝率达130%以上,接枝效率达90%以上,可较好地代替铈盐引发剂。
3.
Main initiation systems,auxiliary means for the ring-opening polymerization of ε-caprolactone to obtain polycaprolactone and their application as biomedical materials are focused on and the developing direction is respected.
综述了聚己内酯的性质、合成与应用情况,重点介绍了由ε-己内酯合成聚己内酯所用的主要引发体系和辅助聚合手段、聚己内酯作为生物医用材料的应用,并探讨了聚己内酯今后的发展方向。
4) initiator
[英][ɪ'nɪʃieɪtə(r)] [美][ɪ'nɪʃɪ'etɚ]
引发体系
1.
Rheological measurement was used to study the cross-linking polymerization of acrylamide and N,N’-menthylene-bis-acrylamide initiated by varied initiator systems.
使用装备自制的四叶片旋转叶片的应力控制流变仪测试不同引发体系作用下的丙烯酰胺(AM)自由基聚合过程的模量曲线,交联剂为N,N’-亚甲基双丙烯酰胺(MBAM)。
5) initiator system
引发体系
1.
A two-part acrylic structural adhesive was prepared , which comprised a new initiator system composed of CHP,derivated thiurea and a s elf-synthesized accelerant,and its temperature of curing exothermic peak,curing times and shear strengths were tested.
以异丙苯过氧化氢、硫脲衍生物和自制促进剂为引发体系 ,制备了一种双主剂型丙烯酸酯结构胶 ,并对其固化放热峰温度、固化时间、剪切强度等方面进行测定。
2.
A summary has been made emphatically on initiator system and the development of polymerization reaction.
本文阐述了超高相对分子质量聚丙烯酰胺聚合的研究进展，着重对引发体系、聚合反应的发展进行了概述，并指出了其发展前景。
3.
Cationic polyacrylamide [P(AM-DMC)] was synthesized by aqueous copolymerization of acrylamide(AM) and methacryloyloxyethyltrimethyl ammonium chloride(DMC) using composite initiator system consisting of oxidant–reductant[(NH4)2S2O8,CH3NaO3S·2H2O] and azo-compound.
研究了不同引发体系对聚合反应的影响,探讨了络合剂、助溶剂及表面活性剂的种类和质量分数对产物特性黏数和溶解性的影响。
6) Initiating system
引发体系
1.
,through improving initiating system,dispersing system,modifying the stripper equipment and adopting new anti-scale agents,the medical grade PVC resin (M-1000) is developed,which contains residual VCM less than 0.
介绍了上海氯碱化工股份有限公司PVC厂在引进 2 0万t/a聚氯乙烯装置上 ,通过改进引发体系、分散体系 ,改造汽提装置 ,并采用新型防粘釜剂 ,开发出了医用级PVC树脂 (M - 10 0 0 ) ,该树脂中VCM的残留量≤ 0 。
补充资料：氧化还原引发体系
分子式：
CAS号：
性质：具有氧化性与还原性的两组分通过氧化还原反应产生自由基，从而引发单体聚合，这样的引发剂是双组分的，称为氧化还原引发剂或氧化还原引发系统。可分为水溶性的和油溶性的。水溶性的氧化剂有过氧化氢、过硫酸铵或过硫酸钾等，相应的还原剂有二价铁离子、亚硫酸钠等。油溶性的氧化剂是有机过氧化物，如过氧化环己酮、过氧化甲乙酮、过氧化二苯甲酰等，用的还原剂是环烷酸盐(钴、锰、钒、铁等)或叔胺类化合物，如N,N-二甲基苯胺、N,N-二乙基苯胺以及硫醇等。氧化还原引发系统的优点是引发聚合速度快，可以在较低温度下引发聚合。
CAS号：
性质：具有氧化性与还原性的两组分通过氧化还原反应产生自由基，从而引发单体聚合，这样的引发剂是双组分的，称为氧化还原引发剂或氧化还原引发系统。可分为水溶性的和油溶性的。水溶性的氧化剂有过氧化氢、过硫酸铵或过硫酸钾等，相应的还原剂有二价铁离子、亚硫酸钠等。油溶性的氧化剂是有机过氧化物，如过氧化环己酮、过氧化甲乙酮、过氧化二苯甲酰等，用的还原剂是环烷酸盐(钴、锰、钒、铁等)或叔胺类化合物，如N,N-二甲基苯胺、N,N-二乙基苯胺以及硫醇等。氧化还原引发系统的优点是引发聚合速度快，可以在较低温度下引发聚合。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条