单组分聚脲材料在寒冷地区某大坝溢流面防护中的应用

水利水电工程泄洪建筑物表面经常遭受高速含沙水流或携带推移质的冲刷,经过一段时间的运行,往往会出现不同程度的磨损及气蚀破坏,采用性能优越的水工混凝土抗冲耐磨材料修复和防护尤为重要。本文通过单组分聚脲材料性能试验揭示了材料的特点,介绍了其在新疆某大坝溢流面防护中的应用情况,其处理技术对类似工程具有良好的借鉴意义。     

羟乙基纤维素添加在醋丙乳液中做保护胶体的初步研究

采用羟乙基纤维素为保护胶体制备了醋丙乳液,探讨了乳液聚合过程中共聚单体配比、保护胶体用量、温度和引发剂等因素对乳液聚合的影响,多方面考察乳液的性能.结果表明：羟乙基纤维素为保护胶体可制备稳定的醋丙乳液,该乳液具有优良的电解质性能.     

保护胶体稳定的丙烯酸酯乳液流变性

分别采用常规乳化剂和羟乙基纤维素为保护胶体制备丙烯酸酯乳液。通过TEM分别观察乳胶粒的形态。利用流变仪测定剪切速率（Ds）-剪切应力（τ）关系、剪切速率（Ds）-黏度（η）关系。结果表明：采用羟乙基纤维素为保护胶体制备的乳液与常规乳液具有不同结构，该结构使其乳液体系流变性能不同。在相同剪切速率下，保护胶体制备的丙烯酸酯乳液的剪切力明显大于常规乳液的剪切力，该乳液在一定剪切速率范围内有剪切稀化现象。     

表面保护膜形成残胶的机理和对策

对丙烯酸酯压敏胶表面保护膜的内聚破坏、粘基破坏、迁移残留等3种残胶现象进行了分类说明,提出了剥离强度经时变化、老化、与被保护表面相容、拉伸效应、黏弹性效应等5种残胶的机理,并提出了相应的解决方案。     

接触轨玻璃钢防护罩研制

本文介绍了地铁接触轨防护罩的结构设计、原材料选择、制造工艺、性能检测、质量控制等.     

共挤保护膜研究概况

介绍了共挤保护膜的特点及国外发展现状以及共挤保护膜所用基材种类及特点，压敏胶主要成分及作用。     

The European,Japanese and US protective helmet,gloves and boots for firefighters: thermoregulatory and psychological evaluations

The purpose of this study was to investigate the physiological and subjective responses of the European, Japanese (JPN) and US firefighters' helmet, gloves and boots for international standardisation. Three experimental conditions were evaluated (clothing mass: 9.4, 8.2 and 10.1 kg for the three conditions, respectively) at the air temperature of 32°C and 60% relative humidity. The results showed that there was no significant difference among the three conditions in oxygen consumption, heart rate, total sweat rate, rectal temperature and mean skin temperature, whereas peripheral temperatures and subjective perceptions were lower in the JPN condition than in the other conditions (P < 0.05). These results indicate that a 0.5-kg reduction in helmet mass and a 1.1-kg reduction in boot mass during exercise resulted in a significant decrease in head and leg temperatures and subjective perceptions, while a 1.9-kg reduction in total clothing mass had insignificant influences on the metabolic burden and overall body temperature.     

Duration of slip-resistant shoe usage and the rate of slipping in limited-service restaurants: results from a prospective and crossover study

Several studies have indicated that slip-resistant shoes may have a positive effect on reducing the risk of slips and falls, a leading cause of injury at work. Few studies, however, have examined how duration of shoe usage affects their slip-resistance properties. This study examined the association between the duration of slip-resistant shoes usage and the self-reported rate of slipping in limited-service restaurant workers. A total of 475 workers from 36 limited-service restaurants in the USA were recruited to participate in a 12-week prospective study of workplace slipping. Of the 475 participants, 83 reported changing to a new pair of shoes at least once during the 12-week follow-up. The results show that slip-resistant shoes worn for less than six months were moderately more effective than those worn for more than six months. Changing to a new pair of shoes among those wearing slip-resistant shoes at baseline was associated with a 55% reduction in the rate of slipping (RR = 0.45, 95% CI = 0.23–0.89). Further research is needed to develop criteria for the replacement of slip-resistant shoes.

Practitioner Summary: The duration of usage impacts the slip-resistance properties of slip-resistant shoes. Slip-resistant shoes worn for less than six months were moderately more effective in reducing slips than slip-resistant shoes worn for more than six months. Shoe use policies should not only encourage or require their use but also include guidance on replacing slip-resistant shoes at regular intervals.     

阳离子型丙烯酸树脂的合成及其水溶性研究

以自由基聚合法合成了阳离子型丙烯酸树脂，通过稳定性比较考察了甲基丙烯酸缩水甘油酯(GMA)用量及树脂中和度对树脂水溶性的影响，用Zeta电位研究了中和度对胶体稳定性的影响，采用激光光散射仪(LLS)测定了胶体颗粒在水分散液中的流体动力学半径及分布，研究表明：当GMA用量为15％(质量分数)，中和度为80％时．体系中胶体颗粒具有足够的亲水性和良好的稳定性。     

重防腐涂料在冶金行业的应用

阐述了涂料的防腐蚀机理，并结合冶金企业设备防腐蚀应用实例，介绍了两种新型防腐蚀涂料。