Study on hydrogenation of partial double bond of styrene series thermoplastic elastomer;
苯乙烯类热塑性弹性体部分双键氢化研究
In this paper we have discussed and Compared the π bonds strength and σ bond Strength in carbon-carbon double bond and carbon-carbon triple bond.
本文较详细地讨论比较了碳碳双键与参键中π键的强弱及碳碳单键、双键、叁键中σ键的强
When epoxy group is introduced into the double bonds of the main molecular chain, the molecular polarity is enhanced,while the high elongation character remains essentially.
天然橡胶在乳液状态下与过氧乙酸反应，在主分子链双键中引入环氧基团，可显著提高分子极性，但其高强伸性能基本保持不变；玻璃化温度上升，冲击弹性下降，耐油性、气密性、粘合性显著改善。
Polysilanes with double bonds were synthesized by the electroreduction of trichloromethylsilane and allyl chloride.
采用电化学合成法,以三氯甲基硅烷和烯丙基氯为单体合成出含有双键的聚硅烷,通过FT-IR,GPC,1H-NMR表征了其结构。
Results shows that higher conjugated double bounds content in PVC resins results in lower initial coloring property,lower whiteness after ageing and lower thermal stabilization;while higher content of isolated double bonds results in lower whiteness;and higher content of iron ions results in high yellow index of PVC resins and its transparent sheet.
研究了聚合度为1 000的PVC树脂共轭双键、金属离子含量与其热老化性能、白度、黄指数之间的关系。
An acetoacetylated polyacrylate and a vinylic groups ended polyurethane were synthesized.
乙酰乙酸基聚丙烯酸酯与端烯基聚氨酯交联反应机理唐黎明＊郭伟刘德山周其庠（清华大学化工系北京１０００８４）关键词乙酰乙酸基，聚丙烯酸酯，聚氨酯，双键，交联机理１９９６－０８－２０收稿，１９９６－１２－０５修回近年来，含有乙酰乙酸基团的聚。
The main focuses are the asymmetric allylation reactions of C=N double bonds through using chiral auxiliary groups, chiral allylation reagents, and asymmetric catalysts.
详细地综述了有关C=N双键立体选择性烯丙基化反应的研究进展。
Since the improper blue-shifted H-bond and dihydrogen bond were found,the unusual phenomena have attracted more and more attentions of scientists.
特别是反常蓝移氢键和双氢键的发现,更加引起了科学家们的广泛关注。
The dihydrogen bonds B—H…H—X and traditional H-bonds N—H…X and X—H…X(X=F,Cl,O) between B3N3H6 and each of HF,HCl or H2O were theoretically studied by use of the ab initio quantum mechanics method(MP2).
运用量子化学从头算方法分别研究B3N3H6与HF、HCl和H2O分子间形成的双氢键B—H…H—X与传统氢键N—H…X与X—H…X(X=F,Cl,O)。
The formation of dihydrogen bonds B—H…H—C and traditional H-bonds N—H…F between B3N3H6 and HxCF4-x(x=1-3) is theoretically studied,using the density functional theory,and it is found that upon the formation of the dihydrogen bonds the BH bonds are red-shifted and the CH bonds are blue-shifts and that the formation of the traditional H-bonds make the NH bonds red-shifted.
运用量子化学从头算方法研究了B3N3H6与氟代甲烷HxCF4-x(x=1～3)之间形成的双氢键B—H…H—C和传统氢键N—H…F。
The Influence of Hydrogen Bond on the Raman Spectrum of S=O in DMSO Aqueous Solution;
氢键对DMSO水溶液中S=O双键Raman光谱的影响
an amine containing the double bond linkage -C=C-N-.
一种具有双键连接C=CN的胺。
An organic compound containing many double bonds.
多烯一种包含许多双键的有机化合物
One atom of oxygen is linked to the nitrogen atom by a double bond.
一个氧原子以双键与氮原子相连。
Compounds containing two double bonds are called dienes.
包含两个双键的化合物叫做二烯烃。
Studies on the Reaction of the Rearrangement of Non-Conjugation Alkene by Microwave;
微波辐射下非共轭双键重排反应研究
Surface-modification of Silica Nanoparticles by Carbon-carbon Double Bonds and Its Tribological Properties
碳-碳双键修饰纳米SiO_2及其摩擦学性能
alternate type mounted reversible moldboard plough
悬挂键式双向铧式犁
Dihydrogen Bonds and Traditional H-Bonds of B_3N_3H_6 with HF,HCl or H_2O
B_3N_3H_6与HF、HCl和H_2O形成的氢键和双氢键
Theoretical Studies on Bifurcated Blue-shifted Dihydrogen Bonds of NH_3BH_3
NH_3BH_3的双接触蓝移双氢键的理论研究
Theoretical Study of Hydrogen Bonds and Dihydrongen Bonds between π-conjugate Hetero-cyclic Molecules and Some Proton Donors
杂环芳香体系分子间氢键和双氢键的理论研究
Theoretical Study on Dihydrogen Bonds and H-Bonds of B_3N_3H_6 with H_xCF_(4-x)(x=1-3)
B_3N_3H_6与氟代甲烷形成的氢键和双氢键的理论研究
double-KWIC index
双重上下文内关键字索引
Indicates that the user has double-clicked the left mouse button in the control
指示用户已在控件内双击了鼠标左键
Double click show main window(right click for menu)
双击显示主窗口 (单击右键有菜单)
Double click to start the screen protect( right click for menu)
双击启动屏幕保护(单击右键有菜单)
Double click start screensaver(right click for menu)
双击启动屏幕保护 (单击右键有菜单)
Suddenly the new comer stopped with her hands on her key.
陌生人突然停住了，双手搭在琴键上。