聚偏二乙烯的

The Poly Vinylidene Fluoridemembrane was chosen to produce ultrasonic in transducer due to its higher sensitivity and better flexibility than other piezoelectric material.At the mean time,harmonic analysis to the PVDF film vibration was performed using ANSYS.The results show that the PVDF membrane can produce an ultrasound with afixed resonance frequency.

对各种压电材料进行比较分析，得到聚偏二氟乙烯膜比其它材料具有更高灵敏度和更好柔韧*，通过对其振动特*进行有限元分析，得到PVDF膜在固定频率具有振幅最大值，可知PVDF膜更适合做声频定向超声波传感器的振动膜来进行声音传播的方向控制。

The tool of Discover in the international popular software Materials Studio and the advanced COMPASS force field are adopted to simulate mechanical properties of PETN and PETN-based PBX at different temperatures, which is coated with four fluorine-containing polymers.

选择聚偏二氟乙烯、聚三氟氯乙烯、F2311和F2314作为粘结剂，对PETN及其与这4种含氟聚合物组成的PBX，用国际上流行的Materials Studio软件中的DISCOVER模块，以先进的COMPASS力场，主要模拟研究了PETN基PBX在不同温度下的力学性能。

This paper introduced physical and chemical properties of polyvinylidene fluoride,with good thermoplasticity,which provided diversitied usages.

主要介绍聚偏二氟乙烯———一种具有多种用途的热塑性氟塑料，由于独特的结晶形态和介电性能而具有良好的耐化学腐蚀性。

The catalytic property of polyvinylidene chloride polyethylene polyamine palladium complex (PVDC-DETA-Pd,PVDC-TETA-Pd,PVDC-TEPA-Pd)for Suzuki reaction of sodium tetraphenylborate with iodobenzene were examined under microwave heating.

本论文研究了聚偏二氯乙烯多乙烯多胺负载钯催化剂和PVDC二苯胺钯催化剂的制备、表征及其在微波条件下对Suzuki反应的催化性能。1。

Polyvinylidene fluoride is applied as sensor to monitoring the vibration of stayed cables ,and digital signal processor is applied to realize the FFT transform of signal ,the tension can be calculated.

聚偏二氟乙烯传感器通过监测应变得到拉索的振动信号，采用数字信号处理芯片实现振动信号的快速傅立叶变换，利用变换得到的振动频率计算出拉索的张力，实现斜拉索张力的在线测量。

Polyvinylidene Fluoride PVDF homopolymer conforming to ASTM D-3222, Type I, Grade 2, is a tough, abrasion-resistant fluorocarbon material that has a design stress of 1,360 psi at 73°F and a maximum service temperature of 280°F.

聚偏二氟乙烯PVDF均聚物，符合ASTM D-3222，类别1，等级2标准，是一种坚固的、耐磨的碳氟化合物材料，在22oC下，其设计应力为1，360 psi，最高工作温度达到137oC。

It is the most common form of PVDF and the most thermodynamically stable.

它是聚偏二氟乙烯的最常见晶型，也是热力学最稳定的晶型。

According to the geometries of the conformers and the statistical weight parameters, we can construct six-state statistical weight matrices.

在此基础上，应用计算得到的模型分子的几何构型与统计权重参数，分别构建针对－CH2-和－CCl2-中心的聚偏二氯乙烯的6态旋转异构态模型。

objective: to prepare the molecularly imprinted composite membranes with propofol as template.methods: with the ultraviolet light and initiator, template molecular propofol, functional monomer methacrylate and crosslinking agent ethylenegly-coldimethacrylate formed molecularly imprinted composite membrane through polymerization on the surface of polyvinyli-dene fluoride microporous membrane.inspection of the combination of template molecule and functional monomer, characterization of the membrane surface morphology with scanning electron microscopy.results: the morphology of composite membranes was well.propofol bonded to methylacrylic acid with hydrogen bond.conclusion: the method of ultraviolet light-struck is feasible for preparation of molecularly imprinted composite membranes with propofol as template.

目的：制备异丙酚分子印迹复合膜。方法：在紫外光照和引发剂的作用下，模板分子异丙酚、功能单体甲基丙烯酸和交联剂乙二醇二甲基丙烯酸酯在聚偏氟乙烯微孔滤膜表面聚合形成分子印迹复合膜，考察模板分子和功能单体的结合特性，用扫描电镜表征膜的表面形态。结果：复合膜形态良好，异丙酚和甲基丙烯酸以氢键的方式缔合。结论：用紫外光照射法可以制得异丙酚分子印迹复合膜。

The ultrathin multilayer film of poly (diallyldimethylammonium chloride) and polyvinylidene fluoride has been prepared by the layer-by-layer static self-assembly method. The PVDF/PDDA multilayer film with the thickness ranging from about 30nm to 150 nm the thickness of each layer is about 9nm.

聚二烯丙基二甲基氯化铵和极化处理后的聚偏氟乙烯复合超薄膜是通过层与层的静电自组装方法制备的，厚度约30～150 nm，每层膜厚度约为9 nm。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。