二乙烯基

At present, the design of new and good photochromic properties of the aryl vinyl compounds is still research in the field of hot spots.

目前， 设计合成新的具有良好光致变色性能的二芳基乙烯类化合物仍然是该领域的研究热点之一。

An amount of the aromatic vinyl polymer is preferably 5 to 150 parts by weight based on 100 parts by weight of the diene rubber.

以100重量份的二烯橡胶为基准，芳香乙烯基聚合物的含量优选为5～150重量份。

Dissolve in ethanol, ethyl ether, chloroform and other organic solvents.

1，4-二［2-（4-吡啶）乙烯基］－苯是一种暗红色固体。

Spinodals of polystyrene/poly/poly(2,6 dimethyl 1,4 phenylene oxide) were simulated over a wide temperature range and the calculated resul...

将上述方法用于已知状态方程参数的三元均聚物共混物聚苯乙烯／聚甲基乙烯基醚／聚2，6－二甲基1，4－苯撑氧中，得到一系列不同温度下的spinodal相图，预测结果与文献报导吻合。在此基础上进一步研究了聚合物的分子量对体系相行为的影响。

Molecularly imprinted polymers of sulfamethazine(SM 2 ) were prepared with silica gel as a sacrificial material, methacrylic acid and 4 vinylpyridine(4 Vp) as functional monomers, glycol dimethacrylate as crosslinker. The polymer properties were investigated by static adsorption experiments. Scatchard analysis shows that the adsorption ability of MAA MIP is superior to that of 4 Vp MIP. The dissociation constant of MAA MIP is 9 59×10 -4 mol/L. The value of apparent binding a...

以磺胺二甲嘧啶为模板分子，分别用甲基丙烯酸和4乙烯基吡啶为功能单体，二甲基丙烯酸乙二醇酯为交联剂，采用牺牲硅胶法合成了磺胺分子印迹聚合物，通过静态吸附实验，系统研究了不同单体对聚合物识别性能的影响；Scatchard分析表明，以甲基丙烯酸为单体的聚合物具有较高的吸附能力，其离解常数Kd为959×10-4mol/L，最大表观结合位点数Qmax为3070μmol/g。

A study was made on the application of dimethyl silicone oil ,propanetriol and 1,2 propanediol to decrease the modulus of MVQ vulcanizate.

探讨了用增塑剂二甲基硅油、丙三醇和1，2－丙二醇降低甲基乙烯基硅橡胶硫化胶模量的途径。

The protic- or Lewis acid catalyzed ring-closure of divinyl ketones (and their acid-labile precursors) pentadienylic cations is known as the via Nazarov cyclization.

质子酸或路易斯酸通过戊二烯基阳离子催化二乙烯酮的环闭合（以及它们的酸不稳定前体）这个反应被称为Nazarov环化。

The leftover from bamboo processing was comminuted into bamboo fine powder, which was surface-treaded with a coupling agent of ethenyl tri (β-methoxyethoxy) silane; and then in the presence of initiator dicumyl peroxide, the powder was compounded with styrene-isoprene block copolymer/bromobutyl rubber blend to prepare a crosslinked vibration-absorbing rubber composite material.

将竹加工的边角料粉碎并用乙烯基三硅烷偶联剂处理，再与苯乙烯－异戊二烯嵌段共聚物和溴化丁基橡胶的共混物进行复合，在过氧化二异丙苯引发剂的作用下制得交联型橡胶吸振复合材料。

Secondly, the energy levels of every layer in a designed device have to be matched each other.Quantum chemical calculations were carried out in order to investigate the photoelectric performance of our target molecules. According to the results of our quantum chemical calculations, the HOMOs are usually distributed along the thiophene-perfluorocyclopentene-thiophene skeleton of diarylethene molecule in both of the open-ring state and closed-ring state.

实验表明，在阻挡层式光控载流子开关器件的设计中，要实现完全意义上的ON-OFF全开关，必须满足两个条件：一是作为光控载流子开关层的二芳基乙烯材料，必须具备足够大的开环态和闭环态之间的HOMO能级差异，在一种状态下有利于载流子的传输，在另一种状态下则可以顺利地阻挡载流子的传输；二是器件的各材料层之间的能级一定要互相匹配。

It is important to use the best available water blended with not more than 60 percent ethylene glycol base antifreeze or 50 percent propylene glycol base antifreeze.

最重要的是要利用现有的水混合不超过60%或50%乙烯丙烯乙二醇防冻剂乙二醇基制药基地。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。