查询词典 polystyrene

Polystyrene-divinylbenzene is an important hydrophobic catalyst in gas-liquid exchange reactions to separate hydrogenous isotopes.

聚苯乙烯－二乙烯基苯是氢同位素分离技术中气－液交换反应重要的疏水催化剂载体。

Chun Hing Canton franchise Color incombustible type sandwich panel, color steel polystyrene sandwich panel, color steel sandwich panel glass magnesium, color steel series products.

广州骏兴专营彩钢不燃型夹芯板，聚苯彩钢夹芯板、玻镁彩钢夹芯板，彩钢结构系列产品。

According to the refractive index change of glass, sliver and polystyrene for different incident wavelengths, the sensitivity of surface plasmon resonance sensor for different wavelengths were analyzed.

依据玻璃、银和聚苯乙烯的折射率随波长变化而改变的性质，分析了不同波长入射光条件下表面等离子体共振传感器的探测灵敏度。

The experimental data are used to fit the refractive index change of glass, sliver and polystyrene with wavelength, and the SPR sensor sensitivity under different wavelengths was achieved by application of the fit result in theoretical calculation.

根据得到的实验数据，对玻璃、银和聚苯乙烯的折射率相对波长的变化进行了数据拟合，将拟合的结果用于理论计算，得到不同入射波长下表面等离子体共振传感器的探测灵敏度，提出了不同灵敏度要求下入射波长的优化选取。

Numerical simulation results show that the fluid flow in Lost Foam Process was different from that in an ordinary green sand mold, the molten metal flow forwards in a circular-arc shape from the ingate, meanwhile, the nature of the gating system influenced the filling process notably. As the polystyrene pattern decomposition has a strong quenching effect on the flowing metal fornt, a high temperature gradient was formed at the flowing metal front, this resulted in the dropping of temperature of the metal to the liquidus temperature quickly and decreased the flowability of molten metal, the temperature distribution in the metal behind, however, was even. The properties of the pattern and the coating affected the temperature distribution remarkably.

从内浇口开始，金属液呈放射状均匀向前充填，同时浇注系统性质显著影响金属液充型过程的流场；由于聚苯乙烯模样气化吸热对金属液的激冷作用，在金属液流端部区域产生很大的温度梯度，使得端部区域金属液很快降至液相线温度，降低了金属液的充型能力，而后续金属液中温度分布则比较均匀，模样性能、涂料性能显著影响这一温度分布特点。

The company is specializing in the production of extruded polystyrene foam insulation board with production enterprises.

公司是专业生产绝热用挤塑聚苯乙烯泡沫塑料板生产企业。

At present, thermal insulation material used is polystyrene board.

目前，保温材料用的聚苯板。

Polystyrene board insulation on the external walls of the material systems are often difficult to meet this requirement.

聚苯乙烯对材料系统的保温外墙板往往难以满足这一要求。

Can be used as polystyrene board insulation systems and extruded plate insulation system of leveling material.

可以作为聚苯板保温系统和挤塑板保温系统中的找平材料。

A selective and mild PS-DIB/ionic-liquid immobilized 2, 2, 6, 6-tetramethyl-piperidin-4-ol-N-oxyl catalytic oxidation procedure of alcohols to the corresponding aldehydes and ketones in ionic liquid BF4 at room temperature was developed. The oxidant PS-DIB was prepared via the iodation and acetylation of polystyrene resin. For the preparation of the ionic-liquid immobilized TeMPO catalyst, 4-(2, 2, 6, 6-Tetramethyl-1-oxyl-4-piperidoxyl)butyl bromide was first synthesized from TeMPO and 1, 4-dibromobutane.

将聚苯乙烯树脂先碘化再乙酰基化，制得了负载型二乙酰氧碘苯作为氧化剂。2， 2， 6， 6-四甲基－N-氧自由基哌啶醇与1， 4-二溴丁烷反应生成4-溴丁氧基－2， 2， 6， 6-四甲基－哌啶－1-氧化物，再与N-甲基咪唑发生季铵化反应，生成的溴化季铵盐与四氟硼酸钠进行离子交换制得氟硼酸型2， 2， 6， 6-四甲基－N-氧自由基哌啶负载离子液体。

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。