查询词典 polyoxymethylene

A three-dimensional model of rotor was built based on ANSYS, and analyzed with hexahedral SWEEP mesh method. Furthermore, a numerical simulation for Polyoxymethylene rotor's intensity and stiffness was carried out by using quasi-dynamic model method, and the stress and strain data of the rotor at six operating points were derived.

基于ANSYS有限元软件，建立了转子三维模型，并对其进行了六面体SWEEP网格划分；采用准动态模拟方法对非金属材料的聚甲醛转子强度、刚度进行数值模拟计算，得到了6个工况点中转子应力及变形数据。

Polyoxymethylene with wry high degree of erystallinity cain be obtained by γ-irradiation of trioxane single crystals with Co60 source.

三聚甲醛单晶经Co60γ射线辐照可以得到一种结晶度很高的聚三聚甲醛。

In this article, the glass transition temperature of a single polyoxymethylene chain adopting the modified bond fluctuation model was studied.

聚甲醛单链的键平均能量随温度增加而增加，比热在玻璃化转变温度 Tg 附近发生突变，同时发现 Tg 与链长 N有：Tg=T∞g -A/ N的关系

The crystal structure of trioxane was accurately determinated. By using the crystal structure model of trioxane, the ring-opening polymerization mechanism of trioxane by γ-irradiation may be fairly well explained. Polyoxymethylene obtained by solid state polymerization of trioxane may have two types of molecular chains with different orientations, one parallel to the C...

我们精确测定了三聚甲醛的晶体结构，利用三聚甲醛晶体结构模型，可以很好地阐明三聚甲醛在受到γ射线辐照后开环聚合的机理，由三聚甲醛晶体固相聚合得到的聚三聚甲醛，应该有两种不同取向的分子链，一种与三聚甲醛的c轴平行；另一种与c轴成75°37′的交角。

It was found that the energy Per Kuhnian bond of a single polyoxymethylene chain increases slowly at TT g , and the specific heat of this system is discontinuous around the glass transition temperature T g .

聚甲醛单链的键平均能量随温度增加而增加，比热在玻璃化转变温度 Tg 附近发生突变，同时发现 Tg 与链长 N有：Tg=T∞g -A/ N的关系

The effects of the stabilizers including copolyamide polyamide-6 PAX poly( ethylene-co-vinyl alcohol as well as COPA/EVOH on the thermal stability of Polyoxymethylene have been respectively evaluated by using isothermal degradation at 220℃ and thermogravimetric analysis.

结果表明，稳定剂在氮气气氛中的稳定效果相当优异，极少量(0.2％)的稳定剂便能显著提高POM的热分解温度。

Polyoxymethylene isone of five engineering plastics which has excellent combined properties, especiallyexcellent friction behavior, therefore widely be applied in rotation parts of mechanical,electric motors, electric appliance accessories.

聚甲醛是五大工程塑料之一，综合性能优异，尤其是摩擦磨耗性能优良，因此最适用于作机械、电动机、电子电器用零件的转动部位材料。

Moreover, the effects of nano silicon dioxide (SiO2) particles and nano SiO2-g-PBA composited particles on the of polyoxymethylene were studied by means of mechanical properties test, scanning electron microscope and TEM.

力学性能、扫描电子显微镜及透射电子显微镜等测试表明：纳米SiO2在POM中团聚明显，而SiO2-g-PBA纳米复合粒子POM中分散均匀，导致POM/SiO2-g-PBA纳米复合材料的缺口冲击强度明显高于POM及POM/SiO复合材料，当SiO2-g-PBA纳米复合粒子的质量分数为2%时，POM/SiO2-g-PBA复合材料的冲击强度是POM的8倍多，同时拉伸强度有一定的增加。

Molecular dynamics simulations of NPT (constant pressure and constant temperature) dynamics are carried out to obtain specific volume as a function of temperature for polyethylene , polypropylene , poly-isobutylene , polyoxymethylene , and polydimethylsiloxane .

用NPT分子动力学模拟来获得聚乙烯、聚丙烯、聚异丁烯、聚甲醛和聚二甲基硅氧烷在不同温度下的特征体积。体积玻璃化转变温度通过对模拟得到的V-T作图的曲线的拐点决定。

High impact and low wear Polyoxymethylene blend was prepared by melt blending of POM with copolyamide, silicone grease, oil carrier and surfactant.

将聚甲醛与适量的三元共聚尼龙、矽油、载油体及表面活性剂熔融混合，制备出了性能优良的高抗冲、低磨耗POM共混物。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。