抄数系统在产品设计和模具制造中的应用

介绍高速抄数机的基本结构、功能、工作流程以及在新产品开发,模具型腔、型芯设计和制造中的具体应用.     

成核剂对聚丙烯辐照交联行为的影响

系统研究了聚丙烯的辐照交联行为,证明加有成核剂的聚丙烯辐照稳定性好,容易制成性能优异的辐照交联聚丙烯。根据此研究结果,发明了“高性能辐照交联聚丙烯的制备”这一专利技术。此技术在化工、建筑等方面均有广泛的应用前景。     

氮在钌单晶表面Ru(0001)上的吸附

钌系氨合成催化剂作为第二代氨合成催化剂,近年来日益受到重视。研究氮分子在钌表面上的离解吸附对提高钌催化剂的催化性能有着十分重要的意义。综述了氮分子在Ru(0001)单晶表面吸附的研究进展，并指出钌催化剂的发展方向。     

纳米材料的表面修饰与应用

综述了纳米材料表面修饰的研究概况，介绍了纳米粒子的表面特性及表面修饰的目的和方法，阐述了表面修饰在制备半导体纳米材料、稀土化合物纳米材料、氧化物和金属纳米材料等方面的应用，并对表面修饰技术的发展进行了展望。     

光敏树脂的研制

本文介绍了环氧丙烯酸醌和聚氨酯丙烯酸酯这两种光敏树脂的合成方法，固化体系的选择，并对几种光固化引发体系作了比较。本文还就电子转移敏化剂在光固化反应中的应用作了初步探索。     

Maleic anhydride grafted polypropylene as a coupling agent for polypropylene composites filled with ink‐eliminated waste paper sludge flour

Ink‐eliminated sludge flour (IESF), a waste residue from the recycling treatment of waste paper, is a promising new kind of filler for thermoplastic polymers with a good price/performance ratio and advantages for environmental protection. In this study, high‐impact polypropylene (PP) and maleic anhydride grafted polypropylene (MAPP) were chosen as a polymer matrix and a coupling agent, respectively, for the preparation of IESF/PP composites, and the structures and properties of the obtained composites were also investigated. The experimental results revealed that IESF not only induced the crystallization orientation of PP along the b axis but also had a restraining effect on the formation of the β phase during the recrystallization of PP from the melt; the addition of MAPP further strengthened this effect to some extent. In addition, the proper addition of MAPP was helpful for improving the thermal stability of the IESF/PP composites. With the strengthening of the interfacial interaction between the IESF and PP matrix by MAPP, the resultant efficient stress transfer from the PP matrix to the IESF particles led to increased tensile and flexural strength. However, the original greater rigidity of MAPP, with respect to PP, reduced the toughness of the composites and caused some negative effects on the impact strength and the elongation at break. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 2320–2325, 2004     

Electrode–Ceramic Inter-Diffusion of Ba(Ti,Zr)O3-Based Y5V MLCCs with Ni Electrodes

The Ba(Ti,Zr)O₃-based multilayer ceramic capacitors (MLCCs) with Ni electrodes, which meet the Electronic Industry Association Y5V standard (from −30° to 85°C, at a temperature capacitance coefficient between −82% and 22%), have been studied in view of the electrode-ceramic inter-diffusion by several microstructual techniques (scanning electron microscopy/transmission electron microscopy/high-resolution transmission electron microscopy (HRTEM)) with an energy-dispersive X-ray spectrometer (EDS). The EDS analysis shows that the elements' inter-diffusion took place along the metal–dielectric interface and the migration of Ni toward the dielectric layers dominated this process. The incorporation of Ni did not transform the crystal structure but introduced lattice distortions, which were characterized by HRTEM, X-ray diffraction, and EDS. The degree of Ni diffusion in the sample with the thinner dielectric layer was more severe. It was concluded from the results that the Ni diffusion is related to the formation of oxygen vacancies after the annealing process, which should be a noticeable factor in the degradation behavior and reliability of base metal electrode MLCCs. The factors influencing the inter-diffusion are also discussed.     

三种骨灰瓷原料的制备与晶相结构

本实验采用牛、猪、羊三种骨头通过高温煅烧制备骨灰瓷原料。采用XRD和SEM方法表征三种骨灰料的晶相结构和显微结构。实验结果表明 :三种骨灰料经 14 0 0℃煅烧后均存在Ca1 0 (PO4 ) 6(OH) 2 、α -Ca3(PO4 ) 2 种晶相。在 132 0℃煅烧的三种骨灰料中 ,按牛、猪、羊顺序 ,Ca1 0 (PO4 ) 6 (OH) 2 含量分别为 87 2 %、89 1%、71 9% ;β-Ca3(PO4 ) 2 含量最高 ,其可塑性和成瓷性能好 ,从晶相上考虑选择羊骨为较佳的骨灰瓷原料。从白度和透光度上考虑选择牛骨为较佳原料。随着煅烧温度升高 ,三种骨头料的β-Ca3(PO4 ) 2 含量增加 ,羊骨和牛骨中的Ca1 0 (PO4 ) 6 (OH) 2 含量减少 ,而猪骨的Ca1 0(PO4 ) 6 (OH) 2 含量反而增加。因此煅烧温度升高对羊骨和牛骨有利 ,而对猪骨不利     

The linear viscoelastic properties of copolypropylene–clay nanocomposites

The linear viscoelastic properties of copolypropylene (cPP)–clay nanocomposites (cPPCNs) prepared by melt intercalating with different amounts of clay were extensively examined by rheological measurements. Meanwhile, the clay effects on the cPP confinements were first estimated by calculating the activation energy of different cPP moving units, including the whole molecular chain, the chain segment, and smaller unit such as chain link. The results showed that the stability of cPPCNs melts wrecked when the clay loading was above 5 wt %. An increase in clay loading of cPPCNs gave rise to a strong low frequency solid‐like response (G′ > G″). Unlike the matrix polymer, cPPCN5 (with 5 wt % clay) exhibited a relaxation plateau as relaxation time prolonged above 100 s, and displayed a maximal linear modulus. The variations of the activation energy of different cPP moving units revealed that the mobility of cPP molecular chains was restricted by clay layers, while these restrictions were not only related to the clay loadings but also largely depended on the clay dispersion status in the matrix. The motions of cPP chain segments were greatly limited at 3–5 wt % loading of clay, but drastically activated with the addition of 7 wt % clay due to the increasing stacks of clay layers within the matrix. However, it was found that the presence of clay had little effect on the mobility of small cPP moving units such as chain links. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1523–1529, 2006     

基于Monte Carlo随机模拟的综合交通网络布局评价与决策方法

针对综合交通网络评价指标权重及属性值具有主观性和随机性的特点,提出了基于模拟运算的布局规划方案排序选优的群体随机决策方法.仿真生成满足集结的多个专家对指标重要性偏好排序统计分布的权重,同时考虑交通需求的不确定性对指标值的影响,结合客观熵权计算方案的综合评价值,由多次模拟得到的排序优势度确定方案的优劣差异.根据设计的仿真流程通过算例说明了方法应用的有效性,评价中考虑了主客观因素及随机性特征,可以为网络布局提供科学决策依据.