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- Copolycondensation by adding third or fourth monomer into the polymerization system is an efficient way to improve the properties of PPTA. 改善对位芳纶（PPTA）性能的有效方法是在聚合体系中加入第三第四单体进行共缩聚改性。
- The effects of solvent and catalyst on polymerization were discussed . Then a new polymerization system of MMA by using EBB/CuBr/CuBr_2/NNN as initiating system was studied. 并且采用新的聚合体系 ,以溴异丁酸乙酯 /CuBr/CuBr2 /NNN为引发体系 ,二苯醚为溶剂 ,成功地实现MMA的ATRP。
- Dispersant system has important effect on stability of polymerization system, the diameter and diameter distribution, porosity and apparent bulk density of resin particles, etc. 分散剂体系对聚合过程体系的稳定性、所形成树脂的颗粒粒径及粒径分布、颗粒空隙率和表观密度等有重要作用。
- According to the above results, it was suggested that the hydroxyl compounds acted as co-initiators in the ferric alkoxide/lactide polymerization system. 这些结果表明在含羟基化合物的丙交酯／醇铁聚合体系中，羟基化合物作为共引发剂参与了丙交酯的开环聚合。
- Results show that time can affect the viscosity of polymeric system, namely, the effect of time on viscosity decreases with the increase of polymer concentration. 试验表明：时间对体系黏度有一定影响，而且随着体系浓度的增加，时间时体系黏度的影响逐渐减小；
- In vinylidene chloride(VDC)/acrylonitrile(AN)/styrene(St) suspension polymerization system, polymerization mechanism, copolymerization rate, copolymer composition and intrinsic viscosity were investigated. 本文研究了偏氯乙烯(VDC)/丙烯腈(AN)/苯乙烯(St)三元悬浮共聚合体系的聚合机理、共聚速率、共聚物组成及其特性粘度的影响因素。
- This review dealt with the historical development,methods of preparation,choice of ingredients in polymerizing system,testing of property and interacting mechanism of molecularly imprinted polymer. 本文评述了分子印迹聚合物发展历史、制备方法、聚合体系的选择、性能表征及作用机理。
- The possible failure and trouble shooting in the EG spray condenser circulating system are discussed in order to ensure that the continuous polymerization system can run safely and steadily. 介绍聚酯连续生产调和反应过程中，EG循环喷淋系统可能发生的故障及处理方法，以确保连续聚酯设备安全稳定地运行。
- In the polymerization systems studied, segmental rearrangement is the important rate-determining phenomenon. 在已研究过的聚合体系中链段重排是重要的速度决定步骤。
- In the polymerization systems studied, segmental rearrangement is the important rate-determining phenomenon . 在已研究过的聚合体系中链段重排是重要的速度决定步骤。
- Free-radicals may be removed from a polymerizing system by a variety of mechanisms. 聚合体系中的自由基可以通过各种历程清除。
- This review focuses on the recent studies of “living”/controlled radical polymerization. The applications and the prospects of the important polymerization systems are also discussed. 本文对“活性”/控制自由基聚合的研究进展做了综述，并讨论了其主要聚合引发体系的应用现状和前景。
- The stable polymerism system was obtained by the research of the process of polymaerization, and the water-based adhesive was prepared by used of this latex. 通过对聚合过程的研究探寻出稳定的聚合体系，并应用该乳液制备水基氯丁胶乳粘合剂。
- A polymer of two or more different monomers. 共聚物一种由两种或多种不同单体构成的聚合物
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- The drainage system has been aged. 排水系统已经老化了。
