专利信息

中间相炭微球的制取方法公开号 CN 1278513A 公开日 2001.01.03申请人 冶金工业部鞍山热能研究院摘 要 本发明属于炭素材料领域。主要涉及由沥青、重质油制取炭素材料原料。本发明所述的中间相炭微球的制取方法包括原料配备、聚合反应、聚合产物分离及干燥,原料的组成及配比为:基本原料80wt％～99.9wt％,催化剂0.1wt％～20wt％。基本原料为沥青或芳香族重质油中任一种或两者     

超高分子量聚乙烯的应用及改性研究进展

介绍了超高分子量聚乙烯(UHMWPE)的性能和用途,综述了提高UHMWPE加工性能和物理性能的物理改性、化学改性、聚合物填充改性以及自增强改性方法的研究进展,指出了其今后的发展方向.     

常减压装置环烷酸腐蚀与防腐技术

烷酸腐蚀是炼油工业中急需解决的问题,为此对环烷酸在原油中的分布情况、环烷酸的性质、腐蚀特点及原油加工过程中设备易蚀部位进行了阐述.针对影响环烷酸腐蚀的因素,介绍了抑制环烷酸腐蚀的主要措施,包括通过混炼和脱除原油中环烷酸等方法降低原油酸值.优化操作条件,设备材料选择及改性处理,注入高温缓蚀剂等方法,尤其对环烷酸缓蚀剂品种、性能及防腐效果进行较详细介绍     

硬脂酸改性氢氧化铝阻燃剂的实验研究

为改善氢氧化铝阻燃剂与聚合物材料之间结合力差的现状,必须对其进行表面改性。实验采用湿法表面改性工艺,以硬脂酸为改性剂对氢氧化铝阻燃剂进行表面改性处理,通过活化指数和沉降速度等表面物化性能的测定,确定了最佳的改性工艺条件。实验结果表明：改性剂用量为3％,温度为80℃,时间为30min。     

掺杂纳米TiO_2光催化性能的研究进展

锐钛矿相TiO2半导体因较宽的禁带宽度、较低的量子产率等使得它在可见光催化方面的性能受到很大的影响。本文概述了近几年对纳米TiO2进行掺杂改性的方法,提高其光催化性能。     

淀粉微球合成条件的研究

以可溶性淀粉为原料,环氧氯丙烷为交联剂,Span60为乳化剂,环己烷和三氯甲烷为油相,采用逆相悬浮交联聚合法合成淀粉微球。通过单因素及正交实验探讨了各因素对淀粉微球平均粒径的影响。结果表明,水相用量对淀粉微球粒径影响最大,较小淀粉微球合成的最佳条件为：淀粉乳浓度10％,水相用量4mL,乳化剂用量0．5g,交联剂用量3mL。通过电镜照片表征了淀粉微球的微观结构。     

继电保护中变压器微水危害的探讨

简单介绍了变压器油的基本性能、微水危害和目前对变压器微水的处理方法；其中重点介绍了微水对变压器危害，比较了变压器油、微水检测的几种方法，阐述了传统检测方法和目前大力推广的在线监测这几种方法各自的优缺点，为当今变压器油微水在线检测技术的发展提供参考。     

磁性高分子微球制备方法进展

本文综述了磁性高分子微球的制备方法及其过程,重点介绍了磁性微球制备的最新进展。     

专利信息 高分子化工

改性亚微米微粉聚氯乙烯公开号 CN 1365991A 公开日 2002.8.28申请人 陈勃摘要 本发明是对聚氯乙烯粉末原料进行亚微米(几十纳米到几十微米)微粉形态改性工艺方法。该方法具有低成本、高效率,改性后可极大增强聚氯乙烯微粉材料的活性,在多方面提高聚氯乙烯使用的性能和产生良好的经济效益。该方法可进一步应用于高分子材料亚微米微粉的改性。将     

环氧改性氰酸酯的“固化”有看点

环氧树脂（EP）改性氰酸酯树脂（CE）,“固化”大有看点。CE／EP改性体系既能形成大量的三嗪环,保留CE固有的性能优点,又能形成高度交联网络,提高材料的力学性能。用EP对CE预聚体进行改性发现,虽然改性树脂的硬度和模量有所降低,但其弯曲强度及拉伸强度比纯CE提高了近1倍多,断裂伸长率增加了近3倍,增韧效果明显。采用乙酰丙酮过渡金属络合物等作为固化剂的CE／EP改性体系,固化剂用量为环氧树脂的0．5％（质量分数）。研究表明,环氧树脂与氰酸酯共固化物的电绝缘性能,     

基于曲线拟合的信噪比估计校正方法

介绍了QPSK调制的DSSS接收机中基于矩估计的信噪比估计算法,以及在FPGA上实现该算法的关键技术.由于实现误差超出期望,运用了基于曲线拟合的校正方案.以估计幅度值和幅度差值作为自变量和因变量,运用曲线拟合工具获得信噪比估计值应有的修正误差.依据该修正值调整测试值,可使信噪比估计性能大幅提升.最后通过实测证明了校正算法的性能.     

创业绩效结构模型:基于创业绩效测量理论的修正

创业在实践中的回归引起了学术界的极大关注,但是创业绩效的内涵却依旧模糊。本文紧紧围绕"创业绩效是什么"这一创业领域的核心问题,在修正了基于合约的创业绩效理论的基础上,构建了由生存、成长、声誉等三个维度组成的创业绩效结构模型,其有效性在实证研究中通过验证性因素分析得到了验证。     

硬脂酸镁改性氢氧化镁阻燃剂的实验研究

采用硬脂酸镁对氢氧化镁进行湿法表面改性,考察了硬脂酸镁用量、改性温度及改性时间对改性效果的影响。通过改性前后氢氧化镁阻燃剂粉体的活化指数、吸油值及其在分散介质(液体石蜡)中的黏度等表面物化性能来评价氢氧化镁的改性效果,从而确定最佳改性条件,同时采用红外谱图研究了硬脂酸镁与氢氧化镁表面的作用机理。实验结果表明,在硬脂酸镁用量为3%,改性温度为90℃,改性时间为40min的条件下制备的产品性能优良,活化指数达99.4%,吸油值由改性前的78.6%降至40%,黏度较改性前明显降低,硬脂酸镁分子在氢氧化镁表面发生化学吸附键合。     

Scale modification: alternative approaches and their consequences

Important marketing scales such as SERVQUAL are often adapted for use in a particular applied/theory-testing context and/or refined using some statistical method, assuming the resultant scale will have improved psychometric properties for a particular application. However, little attention has been paid to the consequences of how scale modifications are made, the criteria that are used to assess how well a modified scale performs, and whether scale modification is in fact worthwhile. To investigate these issues, we review approaches to scale modification, select an influential marketing scale and use context, and then examine the effects of the different scale modification approaches on which items are included in the refined scale. We then cross-validate the psychometric performance of the resulting scales using criteria that reflect the multiple purposes to which a scale can be applied. The results show approaches that leads to a more reliable scale for one purpose (e.g., segmentation) can be far less adequate for another purpose (e.g., benchmarking).     

An experimental analysis of the impact of a behaviour modification programme on salespersons' effort and performance behaviours

This study adapts a radical behaviourist ‐perspective in the study of the sales manager‐salesperson interaction, and analyses the impact of a behaviour modification programme on both the effort and performance behaviours of salespeople. To this end, a field experiment was conducted with the co‐operation of an industrial sales organization. Subjects were randomly assigned to control and experimental groups and a number of effort and performance indicators were measured via self‐report procedures. The treatment consisted of manipulations to the sales manager‐salesperson interaction in order to improve monitoring systems, introduce more structured feedback mechanisms, and make reinforcement more contingent upon actual behaviours. Results indicate that a number of effort indicator variables and performance outcomes showed significant increases for the experimental group relative to the control group.     

移动AdHoc网络中的TCP改进技术

近年来，有关移动Ad Hoc网络的关键技术研究已经取得了很大的进展，如何有效地提高其网络性能仍然是目前研究的热点问题。本文结合这种网络拓扑动态变化、路由易发生改变的特点，分析了传统TCP协议在应用上遇到的挑战，并从两个途径研究了针对TCP技术的各种改进方案，同时提出了今后可能的研究方向。     

芳香族聚酰胺纤维的制备及应用

综述了芳纶的分类,主要的芳纶化合物为1414和1313。介绍芳纶聚合物的合成及芳纶纤维的纺制方法,芳纶的国内外发展历史和趋势,以及国内外的主要芳纶生产厂家,芳纶在服装、军事、汽车、建筑、航空航天、医疗、等各方面的应用。芳纶纤维的改性方法包括物理改性和化学改性,经过改性的芳纶纤维可以更广泛地应用于生活、生产各个领域。     

Testing a Goodwin model with general capital accumulation rate

We perform econometric tests on a modified Goodwin model where the capital accumulation rate is constant but not necessarily equal to one as in the original model (Goodwin, 1967 ). In addition to this modification, we find that addressing the methodological and reporting issues in Harvie ( 2000 ) leads to remarkably better results, with near perfect agreement between the estimates of equilibrium employment rates and the corresponding empirical averages, as well as significantly improved estimates of equilibrium wage shares. Despite its simplicity and obvious limitations, the performance of the modified Goodwin model implied by our results show that it can be used as a starting point for more sophisticated models for endogenous growth cycles.     

Body modifications and young adults: Predictors of intentions to engage in future body modification

The current study employs the theory of extended self to examine fashion leadership and its predictive value of intention to engage in body modification behavior. Data were collected using a survey. Participants included 454 students from two universities located in the southern United States. Findings identify new relationships among vanity, impulsiveness, market maven and reveal a significant, but weak, relationship between fashion leadership and future intentions. The strong relationship between previous behaviors and future intentions indicates that college students who previously engaged in body modification are likely to repeat the behavior. The current findings offer management new insight as to the importance of and motivations to engage in body modification.