本课题所研究的是含有多聚苯刚性分子片段的金鸡纳碱类手性催化剂。
This paper focuses on the synthesis of cinchona alkaloid catalysts which contains rigid polybenzene moieties and their application in asymmetric catalytic reactions.
CMC由长且刚性的分子组成,由于大量电离的羧基,这种刚性分子存在负电荷。
Since CMC consists of long, fairly rigid molecules that bear a negative charge due to numerous ionized carboxyl groups, electrostatic repulsion causes its molecules in solution to be extended.
根据这些理论和应用方面的实际要求,我们设计了I,V,X,Y四种类型的含有炔键的硫醚类刚性分子。
According to the requires of academic and application, we designed four types of rigid alkythioether molecules include I, V, X, Y.
利用PPTA刚性分子发生逐步缩聚反应的缩聚模型,解释了在缩聚反应过程中,分子链的取向是提高PPTA相对分子质量的必要条件。
The requirement of the orientation of PPTA chains during the polycondensation for high molecular weight of PPTA was explained by the polycondensated mode of PPTA molecules.
结果表明,分子链刚性越大其结晶性和球晶的完善性越高。
Results indicate that the crystallinity of materials increases with increasing the molecular chain rigidity.
块状榴辉岩中石榴石的位错密度低,没有观察到水分子团,虽然在局部发现有位错网,但总体上仍呈刚性。
In the massive eclogites, the garnets with low dislocation density and with no visible clusters of water molecules are mainly rigid although a few dislocation nets have been observed.
刚性沸石中,部分晶格可被水分子松开,晶体保持不变但晶体孔穴增大。
Part of lattice in rigid zeolites can be slackened by water molecules, the crystal lattice remains unchanged, but its space is increased.
我们对半刚性高分子链在三维简立方点阵上进行蒙特卡洛数值模拟。
The Monte Carlo method is used to simulation the behavior of a semi-stiff polymer chain in simple cubic lattice.
本文介绍了环氧树脂高性能化的方法是将环氧树脂低分子量化、多官能团化、以及在柔性链段中引入刚性基团,并例举了高性能环氧树脂的实例。
The method of high-performance is that made epoxy resin, low molecular weight multifunctional and into rigid perssad on flexible segment, given an example.
分析了大单体分子链中刚性链段和柔性链段对材料性能的影响。
The influence of rigid chain and flexible chain in macromonomer chain with the performances of materials was analysed.
研究结果表明:分子结构中含有刚性结构或连有较多的环氧基时,固化产物具有较高的交联密度,玻璃化转变温度较高;
The results shows that epoxy resins containing rigid rod structure or many epoxy groups have a high glass transition temperature (Tg) because of high cross-linking density.
同时,均匀分布的微交联网络结构可有效传递应力,束缚分子链运动,使复合材料的强度、刚性和热稳定性同时得到提高。
Meanwhile, the structure of micro-crosslink net can transfer stress, limit the movement of molecular chain to make the strength, rigidity and thermal stability of the composite to be impro...
该分子具有大的TPA截面是起源于该分子的刚性平面共轭结构所固有的线性吸收特性和TPA共振增强;
The large TPA cross section may result from the intensive linear absorbance of the molecule due to its conjugate rigid plane structure, and the two-photon resonance excitation condition.
此外,考察了膜和高分子链段之间的相互作用,高分子链长以及膜的弯曲刚性、张力对膜形变的影响。
Moreover, the interaction between the membrane and polymer chain length, and the effects of bending rigidity and surface tension on the deformation of the membrane are investigated.
这些优异性能主要来自于液晶聚酯大分子链的高度刚性。
These superior properties ale related with high chain stiffness of liquid crystalline plastics.
主要包括其合成方法和刚性介晶基元接枝到纤维素及其衍生物大分子链上以后对其液晶性质的影响及可能的理论解释。
The synthesis and the effect of the molecular structure on the liquid crystalline property were discussed when the mesogenic unit was grafted on the backbone of cellulose and its derivatives.
刚性和结晶度下降,分子量分布变宽,提升了PP发泡性能。
The rigidity and the crystallinity decreased, the molecular weight distribution becomes wider, improve the foaming properties of PP.
探讨了分子长宽比、刚性实和结构对液晶性质的影响。
The effects of rigid cores, structure and the ratio of molecular length to width on the liquid crystalline properties were also studied.
由于刚性壁的影响,使得有限链长的高分子尾形链与自由链相比,其表示链尺寸温度关系的曲线要稍低。
Due to the existence of the surface, the curves expressing the chain size versus temperature for the tail chain were slightly lower than those for the free chain.
对近些年来热塑性树脂增韧体系、核壳粒子增韧体系、液晶高聚物增韧体系及无机刚性粒子增韧体系等增韧高分子材料的研究进展进行了综述。
This paper reviewed the recent years' studies on macromolecular materials toughened by thermoplastic resins, core-shell latexes, liquid crystal polymers or inorganic rigid particles, respectively.
结果表明5,6,9,10-四脱氢苯并环辛烯分子平面刚性结构,可能稳定存在,但由于苯环共轭性的削弱和较高的张力,使得它易于分解。
Because of the weakened conjugated actions between the carbon-carbon double bonds in the benzene ring and its strong strain in molecule, 5,6,9,10- tetradehydrobenzocyclooctene decomposes easily.
用初等方法计算了二维线性谐振子和刚性双原子分子两种情况的能量曲面所包围的相体积。
A simple method is used to calculate the phase volumes enclosed by energy surfaces of 2-dimensional harmonic oscillator and rigid diatomic molecule.
首先将该算法应用于假想分子模型间的刚性对接,然后将算法应用于HIV- 1蛋白酶与苯甲醚配体的刚性对接。
The algorithm is applied to the docking of several simple model molecules and the docking between the benzamidine and HIV 1 protease.
两端带有碳碳双键,尺寸与液晶分子相近的刚性小分子单体在线偏振紫外光照射下聚合,形成的聚合物膜能够诱导液晶分子均匀取向。
The monomers with vinyl groups at two ends of the main chain after exposed to linearly polarized ultraviolet (LPUV) light can induce homogeneous alignment of liquid crystal molecules.
而SA的高温高压辅助造壁机理包括:分子中具有刚性基团可以抗高温;
SA's complementary wall-building mechanism includes: the molecule has a rigid ring can resist high temperature;
分子模板聚合物是采用分子模板技术制得的带结合功能团和空穴的刚性聚合物。
Molecular template polymers, possessing functional groups and spatial cavities, are prepared by molecular template technique.
我们发现垂直方向由羧酸取代的刚性三维分子能够在溶液中和表面上形成超分子聚合物及其更高级的纳米线状结构。
We found that the rigid 3D hexaacid can form one-dimensional supramolecular polymer, either on surface or in solution phase.
液体的精密过滤,采用新型刚性高分子微孔精密过滤工艺,只有进行正确的工程应用设计,才能正常发挥其高效过滤特性,否则可能事倍功半。
The polymer precise filtration is a new type of technology which could be used for clarification filtration and cake filtration as well as discharge of dry cake.
液体的精密过滤,采用新型刚性高分子微孔精密过滤工艺,只有进行正确的工程应用设计,才能正常发挥其高效过滤特性,否则可能事倍功半。
The polymer precise filtration is a new type of technology which could be used for clarification filtration and cake filtration as well as discharge of dry cake.
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