1. The results prove that the hetero-arm star-shaped polymer of MMA/styrene with controlled structures has been prepared.
研究结果表明：利用电荷转移络合物效应就地生成双官能团大分子引发剂合成异臂星状聚合物是可行的。
2. Linear and star-shaped hydroxy-terminated polys were synthesized by reacting L-lactide with co-initiators such as poly, hydroxyethyl methycrylate, trimethylolpropane, mannitol and sorbierite in the presence of stannous octoate as catalyst.
以辛酸亚锡为催化剂，分别以聚乙二醇、甲基丙烯酸羟乙酯、三羟甲基丙烷、季戊四醇、甘露醇和山梨醇等和L-丙交酯反应，得到末端为羟基的线形和星形聚L-丙交酯。
3. star-shaped
3. Viscidity of four arms star-shaped polystyrene was determined with Ubbelohde vislometer at 23°C, by using tetrahydrofuran as solvent.
通过上述多种试验设计方法，分别利用溶液和本体聚合法考察对聚合过程的影响，表明两种聚合方法在合成时各有其优缺点。
4. One, two and three carboxyl terminal groups were introduced into star-shaped oligofluorenes, respectively; and more planar core structure truxene with 1, 3, 5-triazine-2, 4-diamine end-groups was also designed and synthesized for systematic research and comparison.
包括端基上分别带有1，2和3个羧酸基团的星状芴分子，以及结构更为刚性的3个端基均为2，4-二胺基三嗪环的三聚茚分子，以此形成一个系列的分子结构，便于进行系统性研究。
5. The molar mass of star-shaped PCL was readily controlled by the amount of pentaerythritol in feed.
通过调节季戊四醇的用量就可以有效地调控聚合物的分子量。
6. star-shaped
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7. Whiteboard software system can create and save new documents, edit colors, painting the polygon and star-shaped, oval, straight line and so on.
电子白板软件系统主要实现文件的新建，保存，颜色的编辑，画多边形，星形，椭圆，直线等。
8. BACKGROUND: Recently, the interest in micellization of amphiphilic star-shaped polymer has exponentially increased in the field of drug delivery.
摘要背景：近年来，在药物载体材料领域，两亲性星形聚合物的自组装胶束化引起了人们的关注。
9. In addition, the theoretical and practical significance of Cu''s application in synthesis of star-shaped polymer and graft copolymerization of vinyl monomers onto chitosan were pointed out.
本文对超常价态过渡金属Cu引发丙烯酸钠聚合合成星形聚丙烯酸钠聚合过程进行了研究全文共分两个部分：第一章：对星形聚合物的研究现状进展进行了论述，阐明了铜应用于引发合成星形聚合物的意义。
10. We found the factor of combination in the distribution function of star-shaped polymer by probabilistic method and deduce the analytical expression of Z-average mean-square radius of gyration of star-shaped polymers in the unperturbed state by using Dobson-Gordon model.
然后利用Dobson-Gordon模型推导出星型聚合体系中线性物种及星型物种在无扰态下的Z均均方回转半径的解析公式。
11. Or the copolymerization of 3-methyl-3-oxetanmethanol and tetrahydrofuran, it is foundthat the star-shaped multiarm polymer with a hyperbranched core could be gained by one stepcationic copolymerization.
TIR，〓 NMR和GPC的分析表明，由于四氢呋喃的反应活性远远小于3-甲基-3-羟甲基环氧丁烷的反应活性，因此在聚合反应初期只是得到了3-甲基-3-羟甲基环氧丁烷的均聚物，四氢呋喃只是起溶剂的作用。
12. The Zimm-Stockmayer parameters of the star-shaped polymer with different average molecular weight is almost the same since the polydispersity of the star-shaped polymer changes only a little with molecular weight if the core functionality keeps constant.
我们通过严格的动力学方法推导出阴离子型自缩聚开环共聚合反应体系的分布函数及各级统计矩数。
13. star-shaped
13. The two-step cationic copolymerization of 3-ethyl-3-oxetanemethanol and propyleneoxide using 〓 as initiator results in the star-shaped multiarm polymer with ahyperbranched core.
以〓为引发剂，通过3-乙基-3-羟甲基环氧丁烷和环氧丙烷阳离子共聚合，采用两步法可以制得具有超支化内核和聚环氧丙烷臂的星状嵌段聚合物。
14. Neurology of or relating to or containing large star-shaped cells in the neuroglia.
在神经胶质里属于、有关或包含巨大星形细胞。
15. 公共查询·英语单词大全
15. An ornamental evergreen tree, native to southeast Asia and having crisp, edible, yellow to orange, longitudinally ridged fruits that are star-shaped in cross section.
五敛子，阳桃一种属装饰性常青乔木，原产于亚洲东南部，其果实松脆，可食，呈黄色或桔红色，纵向上隆起，截面呈星状
16. In chapter five, we synthesized star-shaped {C}_3-oligofluorenes end-capped with one, two, three carboxylic groups, respectively.
第五章，我们合成了一系列的端基分别为一、二、三个羧酸的星状寡聚芴。
17. The crosslinking reaction of thus prepared star-shaped PCL and dianhydrides was markedly accelerated under microwave irradiation, and the resultant PCL networks swelled well in many organic solvents. The thermal stability of the PCL networks was higher than that of star-shaped PCL.
微波辐照还能大大加快由此制备的星型聚与二酸酐的交联反应，所得到的交联聚能在多种有机溶剂中溶胀，其热稳定性与星型聚相比有一定的提高。
18. The agglomerated polyhedron may grow into a five petal star-shaped primary silicon.
凝并后的多面体具有生长成五瓣星状初晶硅的内在条件。
19.
19. Based on five-twined orientation of five petal star-shaped primary silicon, we proposed a viewpoint of agglomeration nucleation by tiny Si particles, and on the basis of thermodynamics and kinetics, analyzed the agglomeration process. A model was suggested for the transition from five pyramid polyhedron to five petal star-shaped primary silicon.
在五瓣星状初晶硅五重孪晶关系基础上，提出了过共晶Al-Si合金熔体中Si的微粒子凝并生核的观点，从热力学和动力学分析了凝并过程，提出了硅八面体凝并的五角多面体向五瓣星状初晶硅的转变模型。
20. Indeed, from the cross-section, the apple core was marked a clear five-pointed star-shaped.
真的，从横切面看，苹果核果然显一个清晰的五角星状。