高分子

Boron trifluoride diethyl etherate solution is a middle strong Lewis acid together with good ionic conductivity and good electrocatalytic properties.

摘 要：在过去的20 多年中，导电高分子因具有重要的学术意义和应用价值受到了广泛关注。

Based on Prandtl's momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub-layer, buffer layer, and main turbulent stream for non-Newtonian fluid flowing turbulently in ducts, which according to Karman's three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non-Newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate.

摘要以普兰德动量传递理论为基础，按照卡门的三层模型，通过室内模拟环道用0号柴油及加入减阻剂在圆管内的流动参数的测定，计算了非牛顿型流体管内湍流边界层的层流内层、过渡层、湍流中心的涡流粘度，涡流粘度与运动粘度比、总应力随相对位置的变化等定量参数，探讨了高分子减阻剂对非牛顿流体流动特性的影响，对湍流减阻现象的机理与增大减阻率的条件进行了定量分析。

CS/Gel HPN gel was made and its forming mechanism was characterized by infra-red spectrum and x-ray diffraction. Turthermore, DSC, conductivity titration and turgidity titration were employed to estimate the interaction mechanism between there two biopolymers as well as the properties of HPNs

制备壳聚糖/明胶杂混聚合物网络凝胶，用红外光谱、X射线衍射等测试手段表征了HPN的形成机理，并采用DSC、电导滴定、浊度滴定等方法进一步对两种生物高分子的相互作用机理及HPN的性能做了探讨，结果表明

Nanoparticle possesses several advantages, such as ultramicroscopic size, could prolong the circulation time in vivo hence have the ability to target to tumor.

目的 纳米粒作为药物传递载体被广泛研究，用于肿瘤药物输送的纳米高分子药物载体可延长药物在种瘤中的存留时间。

The reparing high molecular material was divided into absorbable and unabsorbable material,the former included polyglycolic-acid and polyglaction,the later consists of polypropylene polyester and expanded polytetrafluoroethylene.

人工高分子修补材料主要有可吸收和不可吸收两大类，前者有聚羟基乙酸和聚乳酸羟基乙酸两种，后者有聚丙烯网、膨体聚四氟乙烯片及聚酯纤维网。

Subsequently, elastic behaviors of single polymer chains confined on rough surfaces constructed with an undersurface and some periodically tactic pillars are investigated.

接着研究了吸附在粗糙表面上的三维高分子单链的构象变化过程及弹性力学行为。

The hard agglomerate formation could be effectively avoided by mixing some macromolecular surfactants with the undried gels.

在凝胶干燥前加入某些高分子表面活性剂可使粉末团聚状态得到显著改善。

Chelating resin in theminicolumns filling material be much more applied to preconcentration trace heavy elements,for that functionalization with much novel groups, that have advantages such as thatsynthesize simple, price unexpensive, biggish adsorption capability, interfere few, betterstability and strong conmbination with metal ions.

在微型柱的填充材料中高分子螯合树脂由于高分子效应又增添了许多新的功能，具有合成简便、价格低廉、吸附容量大、干扰少和稳定性好与金属离子的结合能力强等优点因而适用于从环境样品中选择性地富集痕量重金属离子。

By this method, the particles with good dispersion stability and uniform size distribution can be obtained.

制备的高分子颗粒具有很好的分散稳定性，基本实现颗粒形态、大小的可控和表面的功能化。

Toray's special polymer technology created a highly uniform micro porous structure that formerly could not be achieved.

东丽的特殊高分子技术创建了一个高度统一的微孔结构，以前无法实现。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。