乙烯-1-辛烯共聚物增韧应用研究

介绍了聚烯烃系弹性体（POE）的特点及其在PP增韧改性中的应用，同时还报道了马来酸酐接枝的POE在极性聚合物复合体系中的应用研究。     

A minimal kinematic model for serial robot calibration using POE formula

Traditional methods based on the product of exponentials (POE) formula are parametrically continuous and complete for the calibration of the kinematic parameters of serial robots. However, these methods are not minimal due to the constraints of joint twists. This paper puts forward a new POE-based model, whose parameters are totally independent and conform to the formula of minimality. This is the first model that simultaneously satisfies the requirements of parametric continuity, completeness, and minimality with uniform and generic modeling rules. The proposed approach avoids the operations of normalization and orthogonalization which are necessary redundancy elimination steps with the traditional model. Simulations on a SCARA robot and experiments on an ABB IRB 120 robot prove that the new model outperforms in convergence, accuracy, and efficiency.     

Rubber‐toughened polypropylene nanocomposite: Effect of polyethylene octene copolymer on mechanical properties and phase morphology

Rubber‐toughened polypropylene (PP)/org‐Montmorillonite (org‐MMT) nanocomposite with polyethylene octene (POE) copolymer were compounded in a twin‐screw extruder at 230°C and injection‐molded. The POE used had 25 wt % 1‐octene content and the weight fraction of POE in the blend was varied in the range of 0–20 wt %. X‐ray diffraction analysis (XRD) revealed that an intercalation org‐MMT silicate layer structure was formed in rubber‐toughened polypropylene nanocomposites (RTPPNC). Izod impact measurements indicated that the addition of POE led to a significant improvement in the impact strength of the RTPPNC, from 6.2 kJ/m² in untoughened PP nanocomposites to 17.8 kJ/m² in RTPPNC containing 20 wt % POE. This shows that the POE elastomer was very effective in converting brittle PP nanocomposites into tough nanocomposites. However, the Young's modulus, tensile strength, flexural modulus, and flexural strength of the blends decreased with respect to the PP nanocomposites, as the weight fraction of POE was increased to 20 wt %. Scanning electron microscopy (SEM) was used for the investigation of the phase morphology and rubber particles size. SEM study revealed a two‐phase morphology where POE, as droplets was dispersed finely and uniformly in the PP matrix. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 99: 3441–3450, 2006     

交联剂DCP用量对POE硫化胶性能的影响

主要研究了聚烯烃弹性体(POE)的交联及补强后的力学性能情况,探讨了交联剂过氧化二异丙苯(DCP)的用量对POE力学性能的影响及其对POE硫化胶补强体系力学性能的影响.结果表明,DCP交联POE后,POE的主要力学性能都比未交联前有所下降;在用白炭黑、炭黑补强后,最佳DCP用量为2份.     

PP/弹性体/无机纳米粒子复合材料的研究进展

概述了目前PP 弹性体 无机纳米粒子三元复合体系的研究进展情况,包括:基体树脂的选择与改性、弹性体尤其是新型聚烯烃弹性体(POE)的应用、无机纳米粒子对复合体系的影响、增韧增强机理的研究等。     

泰安天地广场游人行为研究

作为泰山西路登山之始的泰安天地广场,具有游客集散、市民游憩休闲、泰山文化展示等职能.利用实地观察、抽样调查问卷及访谈等研究方法,对广场游人使用状况进行了评价,并针对问题提出了相应的改进性建议.     

普通CaCO3与纳米CaCO3填充POE的比较

以普通碳酸钙和纳米碳酸钙填充茂金属聚烯烃弹性体（POE），研究了填充体系的力学性能随填料含量变化的规律。结果表明：普通碳酸钙的加入使POE的性能降低，而纳米碳酸钙的加入则起到增韧的作用，且加入3份时效果最好。     

β晶型等规聚丙烯/POE增韧体系的结晶和力学性能

研究了在β晶聚丙烯中加入不同质量分数POE的增韧体系的力学性能,通过差示扫描量热法(DSC)对聚丙烯的晶型进行了研究。结果表明,β晶型等规聚丙烯/POE增韧体系具有高的冲击强度,经过0.3%β晶成核剂处理的聚丙烯与质量分数为25%的POE增韧体系的冲击强度是未经处理的聚丙烯/POE增韧体系的1.5倍,是纯聚丙烯的12倍;与单纯的POE增韧聚丙烯相比,消除了脆韧转变点;试样在拉伸前后呈现明显的β晶型向α晶型的转变。     

机场运营级无线局域网设计

简要介绍了WLAN(无线局域网)协议,着重阐述了在哈尔滨太平国际机场候机楼部署WLAN网络方案、运营模式,同时对工程建设中的网络技术指标以及安全防护等问题提出了具体要求.     

高校新区大学生食堂设计及用后评价——基于行为理论的建筑设计及使用研究

以高校新区的三座食堂为例,分析了其设计特点和共性,对其建成后的使用情况进行用后评价,以期对这一时期高校新区的建筑设计特点进行归纳和反思。