查询词典 foams

As a special form of polymer, the perdeuterated polymer foams not only have the microporours structure and good capabilities as same as nondeuterated polymer foams, but have some particular characters, such as isotope effect, nonradioactivity, and high deuterated ratio. For those reasons, the perdeuterated polymer foams will be used in many fields, especially in inertial confinement fusion and low wastage plastic.

全氘代聚合物泡沫作为一类特种聚合物材料，不仅具有常规聚合物泡沫材料所具有的微孔形貌和良好的物理化学、机械力学等性能，而且还具有独特的同位素效应，以及非常高的氘代率等特征，且无放射性，因而在激光惯性约束聚变(Initial Confinement Fusion，ICF)热核靶材料，以及低损耗塑料光纤材料等研究领域中具有十分广泛的应用前景。

These foams enlarge the application range of cellular materials because of their excellent physical and mechanical properties, as well as their relative amenability to recycling compared to polymeric foams.

并且泡沫金属相对于泡沫塑料具有优良的物理性质和力学性质以及高循环的利用率，所以泡沫金属也逐渐成为一种新的工程材料。

The results show that the deformation characteristics of syntactic foams are very similar to those of plain foams during compression. The syntactic foam is yielded when the strain reaches about 2% and it is collapsed when the strain is larger than 30%.

结果表明，复合泡沫材料在压缩过程中，具有普通泡沫材料的应力-应变曲线的典型特征，在应变为2%左右时材料发生屈服，在应变大于30%后发生破坏。

Effective heat capacity method was used to simulate heat transfer of freezing phase change growth in the metallic foams at the third boundary condition. The average temperature distributions vs. time in the metallic foams were obtained. The results showed effects of different porosity and thermal conductivity on the temperature distributions.

采用显热容法模拟了第三类边界条件下泡沫金属中水的冻结相变传热过程，得到了泡沫金属中骨架和流体的温度分布及其平均温度的变化，分析了不同骨架导热系数及不同孔隙率对介质温度分布的影响。

In reaction-injection moldinga mixture of two or more reactive fluids is forced under high pressure into the mold cavity.Chemical reactions take place in the mold rapidly and the polymer solidifies.Various fibers such as glass,graphite,or boron may also be used to reinforce the materials.Structural foams are also produced by a similar methodusing an inert gasand resin mixture.The product consists of a rigid cellular(closed-cell)structure with a continuous solid skin as muchas 0.080 in.(2mm)in thickness.There are several methods for forming structural foams with density reductions as much as 40% from the solid structure.Because stiffness is proportional to the third power of the thickness of a part,for the same weight of material used,cellular structures are stiffer than solid plastics or metals.

在反应注射成型所夹杂的两个或两个以上的接触过程中，被迫在高压下进入模具cavity.chemical反应发生在模具迅速和聚合物solidifies.various纤维如玻璃，石墨，或硼可能也可以用来加强materials.structural泡沫也产生类似的方法利用惰性气体和树脂mixture.the产品构成的一个硬性蜂窝的结构与连续性固皮肤作为留言Muchas 0.080英寸（ 2毫米），在thickness.there有几种方法，形成结构性的泡沫密度减少了四成之多，从固体structure.because刚度成正比第三力量厚度的一部分，为同样重量的使用材料，蜂窝结构更为严厉的比硬塑料或金属。

With the increase of content of triamine monomer, the mechanical property of polyimide foams is improved, and the glass transition temperature of polyimide foams increases.

随着三胺单体含量的增加，聚酰亚胺泡沫材料的力学性能和玻璃化转变温度得到提高。

The constitutive relation put forward in this chapter and the experimental result of uniaxial tension of elas-plastic foams coincide well. 6. The experimental result of ceramic foams shows that the mainly way of the deformation of framework was its bending for ceramic foam made by natural indurating.

从泡沫陶瓷压缩实验结果知：用自然硬化工艺生产的泡沫陶瓷的骨架变形以弯曲为主，体现了海绵典型的受力特征，实际上是一种海绵和浆料的混合物；用烧结法生产的泡沫陶瓷的骨架变形主要是脆性断裂；前者压缩性能优于后者：两者方向性不明显。

The thermally stable capability and mechanical property of the deuterated foam above were analyzed by the differential scanning calorimetry, dynamic mechanical analysis, stress-strain behavior analysis, and other methods. The results showed that the glass temperature or the decomposed temperature for the prepared foams is 100℃-120℃,or about 400℃, respectively. However, there was the irreversible change in the foams at between 50℃ and 100℃.

结果表明：1泡沫玻璃化温度在100℃-120℃，裂解温度在400℃左右；2在50℃-100℃之间和一定作用力下，泡沫存在不可逆的形变；3室温下(22℃)，随着密度增大，泡沫弹性模量增大，损耗因子减小；在泡沫密度为20 mg/cm3-160 mg/cm3时，弹性模量为2MPa-10MPa，屈服强度为0.01MPa-0.12MPa，破裂形变为5%-35%。

As a special form of polymer, the perdeuterated polymer foams not only have the microporours structure and good capabilities as same as nondeuterated polymer foams, but have some particular characters, such as isotope effect, nonradioactivity, and high deuterated ratio.

摘要全氘代聚合物泡沫作为一类特种聚合物材料，不仅具有常规聚合物泡沫材料所具有的微孔形貌和良好的物理化学、机械力学等性能，而且还具有独特的同位素效应，以及非常高的氘代率等特征，且无放射性，因而在激光惯性约束聚变(Initial Confinement Fusion，ICF)热核靶材料，以及低损耗塑料光纤材料等研究领域中具有十分广泛的应用前景。

The results showed that Japanese cedar, Ma bamboo and Makino bamboo all had a good liquefaction efficiency as liquefied in polyethylene glycol/glycerol co-solvent with H2SO4 as a catalyst. The properties of PU foams made from liquefied woody material were influenced by the formulas of PU resins. Wherein, the PU foams made with a higher ratio of isocyanate would had a more complete crosslinking structure, a better mechanical properties and solvent resistance, and a lower water adsorption.

由试验结果得知，以PEG-400/glycerol为液化药剂，H2SO4为催化剂对柳杉、麻竹及桂竹均有良好之液化效果；液化木质材料所制造PU发泡体之性质受各成分调配比例所影响，其中异氰酸酯比例较高者，其PU树脂中液化木质材料之架桥反应较完全，发泡体机械性能及耐溶剂性较高，吸水性较低。

The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.

该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性，而切还赋予它以新的意义。

If he thought that he could buy me off, he would be wrong.

如果他认为他可以收买我，那他就大错特错了。