| 1. | M z w prediction of the polydispersity index z w of cellulose from its rheological data 从流变数据预测纤维素的多分散指数 |
| 2. | Polydispersity index pid 多分散性指数 |
| 3. | The generated polymers exhibit good solubility in water , controlled molecular weights and narrow polydispersity 这类高分子具有良好的水溶性,展现出分子量高度可控性和窄的分子量分布。 |
| 4. | The research of molecular weight distribution have indicated mat some polymers have high molecular weight and high polydispersity 对聚合物(工工)和聚合物( vd的gpc研究表明:二者的分子量很高,且典有一定的多分散性。 |
| 5. | As the stirring rate increasing , the average diameter of capsules decreases exponentially and its distribution turns narrow , but its polydispersity index increases 随着转速的增加,胶囊的平均粒径呈指数关系减小,分布变窄,多分散指数却增加。 |
| 6. | As the ta concentration increases , the average diameter of capsules decreases exponentially . simultaneously , its distribution gets narrow , and its polydispersity index decreases 随着ta浓度的增加,胶囊粒径呈线性关系减小,分布变窄,多分散指数略有降低。 |
| 7. | Compared with the samples by conventional method , the distribution of the molar mass of the samples ( with polydispersity index of 1 . 762 ) made by novel technique was narrow , and was equal to that of foreign products 制得的样品(多分散性系数为1 . 427 )与常规方法制得的样品(多分散性系数为1 . 762 )相比其摩尔质量分布较窄,与国外产品相当。 |
| 8. | We find the ground state may become unstable due to a polydispersity in the particle dielectric constants . and when the dielectric constants of particles differ greatly from each other , identical particles tend to aggregate into uniform chains 特别高极化颗粒复合体系的物理性质研究摘要是当颗粒偶极矩因子具有较大的差别时,体系中同类颗粒聚集成链的倾向明显增加,使“相分离”现象成为可能。 |
| 9. | Molecular weight distribution curve of 1 , 1 ' - diaformacylferrocene - o - phenylenediamine polycondensate has triplet and polydispersity is a little large . it should be pointed out that the fe2p3 / 2 peak appears basically near fe2 + characterizing 708ev in xps of the two polycondensates , this means that the ferrocene group is rather stable in the polycondensates 其中, 1 , l ’一几甲酞二茂铁邻苯二胺缩聚物的分子量分布曲线呈现三重峰,表明在高转化率时发生大分子链转移后生成带支链的高分子,其多分散性也较大。 |
| 10. | So far , although numerous synthetic routes , such as suspension polymerization , emulsion polymerization , dispersion polymerization , etc , have been developed to produce magnetic composite microspheres , there are still a lot of problems need to be resolved for preparing ideal and useful magnetic composite microspheres . these problems include low magnetic content , low efficiency of encapsulation , big size , polydispersity of particle size , the contamination of composite microspheres by some additives , etc . it is realized recently that the preparation of high quality magnetic composite microspheres relies on the breakthrough of synthesis approaches and the detail understanding of the polymerization mechanism in the presence of magnetic inorganic particles 本文针对当前磁性复合微球磁含量低、洁净度较差,且主要是微米级产品的研究现状,以提高磁性复合微球磁含量、提高复合微球的洁净度及在维持较高磁含量的基础上有效减小复合微球的粒径为主要目标,采用改进乳液聚合法、细乳液聚合法及活性游离基dpe法三种方法制备了不同粒径及磁含量的磁性复合微球。 |