高性能CHDI型聚醚聚氨酯弹性体

介绍了CHDI型PTMG聚氨酯的制备工艺和性能，并就其物理机械性能和其它二异氰酸酯聚氨酯作了比较。     

聚氨酯弹性体的改性研究

采用不同混炼温度，改性剂用量及纤维增强材料对国产ＴＰＵ弹性全的改性进行研究。试验表明：用改性剂Ａ－８９１０与ＴＰＵ共混，可提高ＴＰＵ的综合性能，其复合胶带的主要性能指标已达到目前日本进口胶带的水平。     

轨道车辆用空气弹簧的刚度特性试验

空气弹簧是轨道车辆控制振动的关键部件之一，具有减振效果好，重量轻和刚度可调等优点，已被广泛应用于铁路客车、地铁、轻轨和动车组上。刚度是表征空气弹簧性能的重要参数，它直接反映空气弹簧在静态条件下承受作用力的能力，所以，刚度试验结果的准确性至关重要。因此，如何通过试验来验证空气弹簧产品特性，保证产品质量，势在必行。     

纳米SiO2对聚醚型聚氨酯弹性体的改性研究

研究了纳米二氧化硅粉体材料对硅油聚氨酯弹性体的改性条件，发现硅油改性聚氨酯弹性体和粉体材料再改性硅油聚氨酯弹性体的力学性能较纯聚氨酯弹性体有较大提高，拉伸强度与断裂伸长率分别提高9．16倍和0、54倍。     

Reduction of Noise from Disc Brake Systems Using Composite Friction Materials Containing Thermoplastic Elastomers (TPEs)

Attempts have been made for the first time to prepare a friction material with the characteristic of thermal sensitive modulus, by the inclusion of thermoplastic elastomers (TPE) as viscoelastic polymeric materials into the formulation in order to the increase the damping behavior of the cured friction material. Styrene–butadiene–styrene (SBS), styrene–ethylene–butylene–styrene (SEBS) and nitrile rubber/polyvinyl chloride (NBR/PVC) blend system were used as TPE materials. In order to evaluate the viscoelastic parameters such as loss factor (tan δ) and storage modulus (E′) for the friction material, dynamic mechanical analyzer (DMA) were used. Natural frequencies and mode shapes of friction material and brake disc were determined by modal analysis. However, NBR/PVC and SEBS were found to be much more effective in damping behavior. The results from this comparative study suggest that the damping characteristics of commercial friction materials can be strongly affected by the TPE ingredients. This investigation also confirmed that the specimens with high TPE content had low noise propensity.     

基于有限元分析的大量程力传感器设计改进

采用有限元法对现有的80t大量程力传感器进行分析，并根据电桥原理获得满量程的输出电压值，从而指出其精度较低的原因，并重新确定了贴片方式；通过试验对改进的结果进行了验证，结果表明，通过有限元法对传感器贴片方式的改进取得了明显的效果。     

一种三维加速度计弹性体的分析与设计

介绍了一种可用于振动测量的三维加速度计弹性体结构,其采用3个相互垂直的双平行应变梁组合的形式,每个平行梁敏感一个分量的加速度.经分析和试验结果表明:该加速度计具有灵敏度较高、交叉干扰小,完全满足预期设计要求.     

带孔等厚薄壳荷重传感器弹性元件的形状优化

建立带孔等厚薄壳荷重传感器弹性元件的优化参数模型、有限单元计算模型及优化数学模型,确定电阻应变计的粘贴位置,用结构分析软件ANSYS5.7及一阶优化方法优化弹性元件的形状,提高弹性元件在贴片位置的应变响应。     

NR/HDPE 共混热塑性弹性体的结构与性能研究

用抽提法、流变仪、示差扫描量热仪、热重法、动态粘弹谱仪、扫描电镜等仪器研究了ＮＲ／ＨＤＰＥ共混热塑性弹性体（ＴＰＥ）的结构与性能。实验结果表明，动态和静态硫化共混物的交联程度相近。控制ＮＲ的交联程度可改善共混物的流动性。ＮＲ／ＨＤＰＥ共混热塑性弹性体中、ＨＤＰＥ结晶度则随ＮＲ的增加而略微降低。只要ＨＤＰＥ足以包裹胶胶粒子就可以形成连续相。动态硫化增加了共混物中ＮＲ与ＨＤＰＥ相界面间的结合力。     

Hybrid magnetorheological elastomer: Influence of magnetic field and compression pressure on its electrical conductivity

Graphene nanoparticles are used to produce a hybrid electro-conductive magnetorheological elastomer (MRE-hybrid). We fabricate a magnetoresistive sensor based on the obtained MRE-hybrid. We measure the electrical resistance of the MRE-hybrid in a transverse magnetic field of intensity 0 ≤ H (kA/m) ≤ 65, and separately, the electrical resistance under the influence of a compression pressure p ≤ 14.4 kPa. From the obtained results we determine the variation of electrical conductivity with H, and respectively with p. We develop a theoretical model which explains the effects of H and p on electrical conductivity of MRE-hybrid. The obtained results are presented and discussed.