聚氨酯轮胎研发的最新进展

介绍国内外聚氨酯轮胎的研究和应用进展,对我公司聚氨酯轮胎发展历程及性能进行了详细的回顾及分析,并展望了未来聚氨酯轮胎的发展趋势以及应用前景。     

半钢子午线轮胎的硫化测温

对245／75R16LT轮胎进行硫化测温，并依据得到的各部位胶料的等效硫化时间和实际硫化程度调整硫化工艺，调整后轮胎各部位胶料硫化程度均一性得到改善，成品轮胎的高速和耐久性能提高，同时，可节约能源，降低生产成本。     

废旧轮眙回收利用现状和利用途径

针对废旧轮胎回收处理压力越来越大的难题，系统地分析了处理废旧轮胎的各种方法，对我国翻新轮胎，胶粉用于建筑市场、铺路建设，废胎直接用于热能市场等等的利与弊、现状与前景都做了较详细的论述。对废胎利用与管理上必要的立法问题对照国外先进国家的经验，提出了建设性的意见。     

安钢二炼焦加热集散控制系统

安钢二炼焦焦炉加热控制系统根据蓄热室温度，建立了可靠的数学模型，通过控制加热煤气的压力和烟道废气吸力实现加热的自动控制，并实现参数无纸记录，日报表的自动生成，设备巡检的记录等功能。     

RCAD l.0系统在轮胎设计中的应用

介绍了橡胶计算机辅助设计１０系统（ＲＣＡＤ１０系统）及其在新产品１０－１５农机具轮胎设计中的应用，并与传统设计方法进行了比较。比较结果：用ＲＣＡＤ１０系统设计，机头宽度窄８ｍｍ，胎面胶用量少０４ｋｇ，且新产品设计周期从７ｄ缩短至１ｄ。     

高层级轮胎各层帘布裁断角度的计算方法

提出一种新的确定高层级轮胎内外各层帘布裁断角度的方法。根据各层帘布在成品胎内部的材料分布图和在成型机头上的材料分布图，计算该层所在的机头宽度，比较计算的机头宽度和实际的机头宽度，通过调整帘布裁断角度使两者近似相等。以此确定各层帘布的裁断角度，达到内外层帘线均匀伸张的目的。     

7.50-16 12PR轻型载重轮胎的优化设计

介绍轻型载重轮胎的优化设计。采取的主要措施是：减小轮胎外缘尺寸，外直径由８０８ｍｍ减至７９８ｍｍ，断面宽由１９８ｍｍ减至１９５ｍｍ；胎面花纹以纵向花纹为主，肩部为纵横结合花纹并加深肩部通挖花纹沟的深度，改善肩部生热；胎体帘布采用加粗减层的方法，用６层１８７０ｄｔｅｘ／２尼龙帘布代替８层１４００ｄｔｅｘ／２帘布。优化轮胎重量减轻４ｋｇ，轮胎性能符合国家标准。     

Dynamic reaction inside co‐rotating twin screw extruder. I. Truck tire model material/polypropylene blends

Waste ground rubber tire (WGRT) is a complex composite containing various elastomers, carbon black, zinc oxide, stearic acid, processing oils, and other curatives. Most of the waste ground rubber tire is composed of mainly natural rubber (NR) and styrene butadiene rubber (SBR) in varying proportions. Blending it with other thermoplastic materials is difficult due to the inherent thermodynamic incompatibility. But, the compatibility can be increased by making the reactive sites in WGRT with suitable chemicals under optimum condition of shearing inside a twin screw extruder and it is said to undergo a dynamic reaction inside the extruder. To understand the mechanism of dynamic reaction process of a rubber/polyolefin blend, the blending of a truck tire model material rubber with polyolefin was first tried before it was applied to waste WGRT material. It was observed that the blends of a truck tire model rubber material and PP thermoplastic are physical mixture of two incompatible polymers in which a continuous plastic phase is largely responsible for the tensile properties. The rubber particles are the dispersed phase. The large particle size and the poor adhesion of these rubber particles are believed to be liable for the poor tensile properties. In case of blends of truck tire model material with isotactic polypropylene the tensile properties are found to be lower than that of its PP‐g‐MA counterpart which can be attributed to the reaction of the MA with the carbon black particles. A schematic representation of the possible interactions has been proposed. The effect of addition of compatibilizers such as SEBS and SEBS‐g‐MA has also been studied. The tensile and TGA studies indicate that the polarity of SEBS and SEBS‐g‐MA induces an increase in the performance characteristics for both types of polyolefins but the intensity of this increase is higher in the PP‐g‐MA based blends. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 106: 3193–3208, 2007     

滚动轮胎温度场的有限元模拟计算

在轮胎热学稳态分析的基础上，利用有限元非线性分析功能，开发滚动轮胎温度场有限元模拟计算软件。该软件建立在以下4个假设基础上：①轮胎处于动态平衡时的稳态温度场；②将轮胎的形状看作以旋转轴轴对称；③导热系数和比热容等物性视为常数；④不计轮胎接地时以热传导形式发生的接触热量传递。实例验证表明，数值模拟计算结果与实际测试结果的变化趋势基本一致。     

Use of a sex attractant and an inhibitor for monitoring winter moth and bruce spanworm populations

A single sex pherormone component was isolated from abdominal tip extracts of female Bruce spanworm.Operophtera bruceata (Hulst). This was identified as (Z,Z,Z)-1,3,6,9-nonadecatetraene by capillary gas chromatography (GC), electroantennography, and mass spectrometry. In addition, hexane extracts of female abdominal tips from Bruce spanworm and the winter moth.O. brumata L., were analyzed by GC coupled to an electroantennographic detector (GC-EAD). The extracts ofO. bruceata andO. brumata females elicited only a single response, at the same retention time, from antennae of their conspecific and reciprocal males. In field tests conducted in Saskatchewan, traps baited with the synthetic tetraene captured Bruce spanworm males. In tests carried out on Vancouver Island, British Columbia, where the two species coexist, both Bruce spanworm and winter moth males were captured. The attractancy of lures containing the synthetic pheromone alone and in combination with several structurally related analogs was field tested at both locations. One of these, an isomer of the natural pheromone, (E,Z,Z)-1,3,6,9-nonadecatetraene, inhibited the capture of Bruce spanworm males but had no effect upon the number of winter moth males which were taken. Thus, populations of these two very similar species can be distinguished by employing traps baited with pheromone ± the inhibitor. Coneorifice Hara traps were found useful for field trapping males of both species.Issued as NRCC No. 26107