The results showed that the Ammonium Ceric Nitrate used as initiator is high effective, the rate of polymerization reaction is satisfactory and the capacity of water-absorption for the resin is high. 结果表明:硝酸铈铵引发剂的引发效率高,聚合速度快,树脂的吸水能力强。
The results show that the addition of cyclic iodonium salt to the usual ketone/ amine system mostly result in a increase of the rate of polymerization. -羟乙酯(HEA)-三羟甲基丙烷三丙烯酸酯(TMPTA)的自由基聚合,结果表明,向酮-胺体系中加入环状碘盐可大大加快聚合速度。
Both the rate of polymerization and the maximum conversion percentage increased with increase either in TBH or amine concentration. 当[TBH]/[TEA]的克分子比增加时则聚合速度增加,最高转化率也增加。
The results of initial kinetics indicated the rate of polymerization rP ∝( M) 1.304. The results at high conversions indicated that there is self-acceleration of polymerization. 初期动力学数据表明,聚合速率RP∝[M]~(1.304)。高转化率下聚合结果表明,在一定条件下产生自动加速现象。
The thermal polymerization of phenylacetylene occurred to a negligible extent below 100 °; at 100-160 °, the rate of polymerization increased with increasing temperature. 苯乙炔的热聚合在100°以下很少发生,在100&160°,聚合速度随温度升高而迅速增加。
The ratio between the rate of polymerization of fibrin monomer and maximum absorbency ( reflecting the polymerization of plasmic fibrinogen molecules). 纤维蛋白单体聚合速率与最大吸光度的比值(反映血浆纤维蛋白原分子的聚合功能)。
The effect of initiator concentration, agitation speed, and ionic strength on the rate of polymerization and the particle size were studied. Furthermore, the similarity and difference between the emulsifier free emulsion polymerization of styrene and methylstyrene are compared. 详细讨论聚合条件,如引发剂浓度、单体浓度、离子强度、搅拌速度对聚合速率、粒子尺寸及分布的影响。
Study on Increasing the Grafting Rate of the Polymerization of Polychloroprene Rubber and Methyl Methacrylate 提高氯丁橡胶与甲基丙烯酸甲酯聚合接枝率的研究
The rate of polymerization was first order with respect to both concentrations of monomer and master catalyst. 聚合速度与单体浓度、主催化剂浓度均呈一级动力学关系;
The results showed that: ( 1) the addition of pH regulators could increase the rate of polymerization; 结果表明:在氯乙烯悬浮聚合过程中,添加pH值调节剂能提高聚合反应速率;
The rate of polymerization in the production of carboxylated butadiene-styrene rubber latex was influenced by the change of polymerizing condition in fore-and-aft reactor cleaned and the efficient power of mixing in its reactor and the time of warming-up their materials. 在羧基丁苯胶乳生产中,清釜前后的聚合环境变化、聚合釜搅拌有效功率大小和预热时间长短都能影响聚合反应速率。
Non-equilibrium morphology is formed because of very fast overall rate of polymerization and the strong hydrogen bonding between hard segments. 聚合总反应快,且硬段间氢键化作用很强的性质造成RIMPUU非平衡的形态。
Study on Control of The Conversion Rate of Polymerization in One-step process of acrylic fibers 一步法腈纶工艺聚合转化率控制的研究
Synthesis of 2-( DimethyIamino) ethyl Methacrylate Homopolymers via Aqueous RAFT Polymerization For RAFT polymerization system, the effects of variations on the rate of polymerization, first-order kinetics, molecular weight and molecular weight distribution have been investigated. DMAEMA在水溶液中的RAFT聚合反应研究了RAFT试剂二硫代苯甲酸4-氰基戊酸(CPADB)浓度、引发剂浓度等条件对聚合速率,聚合物分子量及分子量分布的影响。
This paper reports the effect of polyvalent ions on the rate of polymerization of silicic acid. 本文在较广PH值范围研究了多价离子对硅酸聚合速度的影响。实验证明,硅酸聚合中的盐效应具有静电效应和化学反应两种机理。
As a result, it shows the lower overall rate of polymerization, higher collision frequency factor and overall activation energy of polymerization. 表现为低的表观聚合速度和高的碰撞频率因子与表现聚合活化能。
MAIN OUTCOME MEASURES: ① The rate of polymerization of fibrin monomer ( taken as the comprehensive predictor for the concentration and function of plasmic fibrinogens). 主要观察指标①纤维蛋白单体聚合速率(反映血浆纤维蛋白原浓度和功能的综合参数)。
Since the rate of polymerization can be lowered by increasing the Al/ Ti ratio without suppression of ultimate conversion ( Fig. 3), the polymerization reaction may be controlled with Al/ Ti ratio to avoid "heat build-up" in the reaction mixture ( Fig. 4). 增加Al/Ti可以减慢聚合速度而不影响最终转化率(图3);因此,可以利用Al/Ti来控制这一聚合反应以防止反应混合物的积热现象(图4)。
Study on rate of polymerization of surface coating latex for paperboard in first order polymerization 白板纸面涂胶乳一段聚合速率研究
The essential factors which affect the composition, molecular weight, microstructure and the rate of polymerization of XTBN were studied. 研究了影响XTBN的组成、分子量和微观结构,以及聚合反应速率的主要因素。
The effect of emulsification pressure, dosage of ingredient of emulsion, reaction time, reaction temperature and emulsification time on emulsion particle size and rate of polymerization was studied. 研究了各种因素对乳液粒子粒径和聚合速度的影响,结果表明乳液粒子粒径随乳化压力的增大、反应时间的延长、平衡状态时,温度的降低而减小;
The rate of polymerization and final conversion increased and reached maximum with increasing the concentration of potassium permanganate. 高锰酸钾浓度增大,聚合速率及最终转化率逐步增至最大值并趋于稳定;
Studies on the reaction rate of iron polymerization 铁聚合反应速率研究
The rate of polymerization was found to be proportional to the concentration of monomers and initiator with exponents of 1.1 and 0.83, respectively, which are larger than the ordinary values due to the effect of PAAC. 同时发现聚合反应速度分别和单体浓度及引发剂浓度的11和083次方成正比,由于模板的作用数值高于常规值。
The results indicated that the addition of SA as co-initiator greatly improved the rate of polymerization ( Rp) and final double bond conversion ( DC) when compared with the system initiated by CQ alone. 结果表明,在CQ引发体系中,加入助引发剂SA可以显著提高聚合速率和最终双键转化率。