橡胶对HIPS树脂落锤指标的影响

通过对高抗冲聚苯乙烯树脂出现产品落锤指标偏低问题的分析，从橡胶配量及其粒径大小上进行了改进，同时改进了工艺操作，采取了提高反应釜搅拌速度、降低乙苯浓度等措施。结果产品合格率达到９９％以上，优级品率达到９８％以上。     

2-硝基-4''''-氨基二苯胺-4-磺酸的工艺改进

将3-硝基-4-氯苯磺酸与对苯二胺进行缩合反应制得2-硝基-4’-氨基二苯胺-4-磺酸。传统的合成工艺：缩合反应的收率只有83％，主含量86.4％，必须精制后才能使用。本实验对缩合工艺的反应条件如温度，缚酸剂，抑制剂以及加料方式等进行了较为详细的探讨，通过正交实验，选择了最佳缩合反应条件，m（硝化物）：m（对苯二胺）=1.10：1，分次加料，分段保温，获得纯度94.7％的产品。收率提高了8％-10％，减少了废物的排放量，并省去精制步骤。     

Effects of the reinforcement and toughening of acrylate resin/CaCO3 nanoparticles on rigid poly(vinyl chloride)

Novel composite particles based on nanoscale calcium carbonate (nano‐CaCO₃) as the core and polyacrylates as the shell were first synthesized by in situ encapsulating emulsion polymerization in the presence of the fresh slush pulp of calcium carbonate (CaCO₃) nanoparticles. Subsequently, these modified nanoparticles were compounded with rigid poly(vinyl chloride) (RPVC) to prepare RPVC/CaCO₃ nanocomposites. At the same time, the effects of the reinforcement and toughening of these modified nanoparticles on RPVC were investigated, and the synergistic effect of modified nanoparticles with chlorinated polyethylene (CPE) was also studied. The results showed that in the presence of nano‐CaCO₃ particles, the in situ emulsion polymerization of acrylates was carried out smoothly, and polyacrylates successfully encapsulated on the surface of nano‐CaCO₃ to prepare the modified nanoparticles, breaking down nano‐CaCO₃ particle agglomerates, improving their dispersion in the matrix, and also increasing the particle–matrix interfacial adhesion. Thus, the effects of the reinforcement and toughening of these modified nanoparticles on RPVC were very significant, and the cooperative effect of the nanoparticles with CPE occurred in the united modification system. Scanning electron microscopy analyses indicated that large‐fiber drawing and network morphologies coexisted in the system of joint modification of nanoparticles with CPE. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3940–3949, 2007     

十二烷基苯磺酸钠水溶液聚集性质的研究

用滴体积法测出十二烷基苯磺酸钠（ＳＤＢＳ）稀水溶液的表面张力；然后求出其临界胶束浓度（ＣＭＣ）。同时通过溶液的电导率、吸收光谱以及荧光光谱测定求出其ＣＭＣ。这样测出的ＣＭＣ值为１．２～１．６×１０－３ｍｏｌ／Ｌ，与文献值相符。也研究了部分水解的聚丙烯酰胺（ＰＨＰＡＭ）对ＳＤＢＳ聚集性质的影响；发现ＳＤＢＳ的ＣＭＣ值随ＰＨＰＡＭ的加人而减少并且ＰＨＰＡＭ水溶液的粘度随ＳＤＢＳ的存在而急剧降低（类似盐效应）。这些方法与性质对强化采油（ＥＯＲ）是重要的。     

脂肪酸系列表面活性剂的研究进展

概括和综述了4大类10余个脂肪酸系列表面活性剂的合成、性能和应用现状，重点评述了烷醇酰胺及其衍生物、乙氧基化脂肪酸甲酯、脂肪酸甲酯磺酸盐、N-酰基ED3A、氨基酸、咪唑啉、甜菜碱、双子表面活性剂等脂肪酸系列表面活性剂的研究进展。此系列表面活性剂易生物降解、安全、多功能和高效能。     

Interbay物料自动搬运系统性能分析

Interbay物料自动搬运系统的运行效率对于晶圆制造系统影响较大,研究Interbay物料自动搬运系统的绩效具有较大的意义[1]。该文以带有捷径的单闭环背脊式布局的物料自动搬运系统为研究对象,通过问题描述,简化、假设将实际问题抽象为导引运输模型。然后,建立数学模型,采用Dijkstra算法确定工件搬运的最短路径。最后,利用Arena仿真软件建立含有导引运输设备的模型,采用控制变量法探究小车数量小车占用轨道的方式、调度规则等因素对于产出的影响,发现对于本文中的模型,其它条件相同时,搬运系统采用Release-at-end的控制方式,系统最大搬运量越大。     

浅论食品添加剂的安全性

介绍了食品添加剂的定义、分类和作用 ,分析了国内外食品添加剂的现状、发展前景及存在的问题 ,综述了食品添加剂的安全性问题及监督管理办法。     

PP/纳米级CaCO_3复合材料的研究

研究了纳米级CaCO3填充粒状、粉状PP复合材料的力学性能,并用SEM观察纳米级碳酸钙在PP中的分散状态及用SALS分析了其结晶行为。结果表明,粉状PP更有利于纳米级碳酸钙在PP中的分散,并具有更好的加工性能、力学性能。同时纳米级碳酸钙改性PP的SALS图像变得弥散、模糊,PP球晶变得不完善,晶粒更小。     

民法法典化视野下的社员权

社员权问题学界少有论及,在目前民法法典化这个大背景之下研究社员权有着其独特的价值。社员权产生于日耳曼法,正式确立于近代。所谓社员权,系指社员基于其社员身份而对社团和其他社员所享有的权利。作为基本私权利的一个种类,社员权在未来民法典中应当占有一席之地。未来民法典中的社员权法应当包括社员权法通则、建筑物区分所有人的社员权、集体经济组织成员的社员权以及合作社成员的社员权共四部分。     

Analysis of junction temperatures in high-power GaN-based LEDs

We presented the analysis of the incomplete conduction in bonding medium in high power GaN-based light-emitting diode (LED) packages. A numerical study was carried out with parametric model to understand the junction temperature variation due to bonding medium defects. Transient thermal measurement was performed to evaluate LED’s junction temperature. Thermal resistance from chip to lead frame was 20 K/W in our sample LED. It was suggested that only 60% of the surface area of the bonding medium was involved...