可见光引发剂研究进展

光固化技术的应用非常广泛，常用于光固化涂料、油墨、牙科固化、胶粘剂以及 3D打印材料等领域。与紫外光固化相比，可见光固化具备辐射安全、固化深度高、设备价格低廉等优势。作为光固化体系的重要组成部分，光引发剂的研究一直备受关注。本文对近 2~3 a可见光引发剂的研究进展进行了综述，主要从 TPO类、萘酰亚胺类、蒽醌类、咔唑类、硅酮类、肟酯类、共轭染料类、光生酸剂类和金属配合物类光引发剂 9个方面进行了综述，并对可见光引发剂的发展方向做了简单的概述。     

改性剂用量对紫炭黑填充天然橡胶/顺丁橡胶并用胶性能的影响

研究改性剂（间苯二酚/六次亚甲基四胺共混物）用量对紫炭黑填充天然橡胶/顺丁橡胶并用胶性能的影响。结果表明：随着改性剂用量增大，胶料的硬度和定伸应力提高，拉伸强度、撕裂强度先下降后提高，阿克隆磨耗量先增大后减小；当改性剂/紫炭黑用量比为4%时，胶料的物理性能较好。添加改性剂可提高紫炭黑对胶料的补强作用，并在一定程度上改善胶料的热稳定性。     

不同折流板结构螺旋折流板换热器传热性能的比较(英文)

Numerical simulations were performed on flow and heat transfer performances of heat exchangers having six helical baffles of different baffle shapes and assembly configurations, i.e., two trisection baffle schemes, two quadrant baffle schemes, and two continuous helical baffle schemes. The temperature contour or the pressure contour and velocity contour plots with superimposed velocity vectors on meridian, transverse and unfolded concentric hexagonal slices are presented to obtain a full angular view. For the six helix baffled heat exchangers, the different patterns of the single vortex secondary flow and the shortcut leakage flow were depicted as wel as the heat transfer properties were compared. The results show that the optimum scheme among the six configurations is a circumferential overlap trisection helix baffled heat exchanger with a baffle incline angle of 20° (20°TCO) scheme with an anti-shortcut baffle structure, which exhibits the second highest pressure dropΔpo, the highest overal heat transfer coefficient K, shel-side heat transfer coefficient ho and shel-side average comprehensive index ho/Δpo.     

锚栓用量对纯锚固岩棉保温系统抗风压性能的影响

采用ETAG 004:2013《外墙外保温薄抹灰系统欧洲技术认证指南》中规定的静态泡沫块法,测试在单位面积上使用不同数量锚栓的岩棉板外保温系统的抗风压性能。通过试验可以得出:在混凝土墙体上单纯采用敲击式锚栓锚固岩棉板外保温系统时,拉伸强度可达12.9 k Pa;单位面积增加锚栓的使用量可以提高系统的抗拉承载力,但在不同条件下增加相同数量锚栓对系统抗风载能力提高的程度不同;在普通混凝土墙中,单纯锚固岩棉板保温系统破坏时,单个锚栓承载力平均值的最大值约为其拉拔承载力的50.3%。     

基于手持终端的移动物流APP设计与研究

移动物流APP考虑到使用用户人群的特殊性,在设计时需要考虑使用的便捷性,因此从各个可能操作的界面出发,设计相关的操作界面。文中认为,一款覆盖提供运输计划、运输管理、GPS跟踪等服务的APP是行之有效的,货车司机可以利用APP随时随地与平台互动,对运输计划和运输任务进行管理和跟踪。平台也可以通过APP了解各个端点的位置信息,对运输任务进行追踪控制,同时也可以完成对货车司机的相关管理功能。     

Heat propagation in thermally conductive polymers of PA6 and hexagonal boron nitride

Thermally conductive polymers offer new possibilities for the heat dissipation in electric and electronic components, for example, by a three‐dimensional shaping of the heat sinks. To face safety regulations, improved fire performance of those components is required. In contrast to unfilled polymers, those materials exhibit an entirely different thermal behavior. To investigate the flammability, a phosphorus flame retardant was incorporated into thermally conductive composites of polyamide 6 and hexagonal boron nitride. The flame retardant decreased the thermal conductivity only slightly. However, the burning behavior changed significantly, due to a different heat propagation, which was investigated using a thermographic camera. An optimum content of hexagonal boron nitride for a sufficient thermal conductivity and fire performance was found between 20 and 30 vol%. The improvement of the fire performance was due to a faster heat release out of the pyrolysis zone and an earlier decomposition of the flame retardant. For higher contents of hexagonal boron nitride, the heat was spread faster within the part, promoting an earlier ignition and increasing the decomposition rate of the flame retardant.     

300M超高强钢在中性盐雾环境中的腐蚀行为及机制

摘要：为了研究300M超高强钢在中性盐雾环境中的腐蚀行为及腐蚀机制，采用失重法，宏观、微观腐蚀形貌分析，三维表面轮廓分析及电化学分析的研究方法，来表征腐蚀实验现象并进行分析。结果表明：300M超高强钢在中性盐雾环境中的腐蚀产物为FeOOH、Fe2O3、Fe(OH)3和Fe3O4；腐蚀速率随着腐蚀时间逐渐降低，腐蚀后期（72h）腐蚀速率降低50%；腐蚀初期以点蚀为主，点蚀坑通过横向扩展，逐渐发展为后期的均匀腐蚀，腐蚀表面形貌呈沟壑状；外腐蚀层对基体的保护能力很弱，Cr元素在锈层靠近基体的一侧偏聚使内腐蚀层具有一定的抗腐蚀性。