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试验研究了促进剂(TBSI)在全钢巨型载重子午线工程胎胎面胶中应用效果,并分别和次磺酞胺同类促进剂TBBS、DCBS、CBS、MBS在胎面中进行等量的比较。结果表明:在胎面胶中促进剂TBSI的硫化速度比促进剂TBBS、CBS、MBS慢,但比促进剂DCBS快,具有延迟焦烧以及降低硫化速率的特性。等量的TBSI代替TBBS、DCBS、CBS和MBS在胎面胶其过硫化和老化后的物理性能、生热、磨耗都最好。 相似文献
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研究了新型硫化促进剂TBSI在丁苯橡胶中的硫化特性,贮存稳定性及其硫化胶的物理机械性能。结果表明其硫化速率与TBBS相近,而焦烧性优于TBBS,CZ和TMTD。在150℃下过硫化4h后,以TBSI为促进剂的硫化胶300%定伸应力保持率在70%以上,而TBBS的不足60%。在100℃的热空气中放置4h,其焦烧时间为21min,而TBBS和CZ分别为11min和8min。 相似文献
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全成了橡胶促进剂TBSI的几种合成路线,促进剂TBSI不产生毒性物质亚硝胺,是一种很有前途的产品,有替代目前常用促进剂TBBS、NOBS、DIBS、DZ、CZ等的趋势。 相似文献
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在顶空瓶中以热空气老化的方式模拟轮胎硫化条件,采用气相色谱/质谱法分析4种常用促进剂(MBT,CBS,TBBS和DPG)及其混炼胶硫化烟气中的含氮组分。在检测到的26种含氮物质中,确定了15种成分的化合物结构。结果表明:4种促进剂及其混炼胶硫化烟气中的含氮组分种类从少到多依次为DPG,MBT,CBS,TBBS;促进剂DPG及其混炼胶硫化烟气中的苯胺含量较大,应尽量避免使用促进剂DPG;促进剂MBT混炼胶硫化烟气中的含氮组分种类少,毒性较低,是环保型促进剂。 相似文献
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The hypothesis of chemical mimesis in the relationship betweenOphrys orchids and their pollinators was tested experimentally using preparations ofOphrys lutea var.lutea odor and the males of the solitary beeAndrena fuscipes, a species constellation that does not coexist under natural conditions. Correspondence in odor production was shown to occur. Identification of the compounds in the cephalic secretion ofA. fuscipes, males and females, and the flower labella extracts, was performed by gas chromatography and mass spectrometry. Geraniol, nerol, citral,E,E-farnesol and 6-methyl-5-hepten-2-one were present in the extracts of both the orchid and one or both sexes of the bee. Extracts, TLC fractions of extracts, blends, and separate compounds were tested in the field in the mating flight areas ofA. fuscipes males. Extracts and blends containingE,E-farnesol, geraniol, and geranial showed the highest attractivity to the male bees. These compounds seem to be responsible for the release of the odor-guided mating behavior at theO. lutea labellum and can be regarded as general attractants for many species ofAndrena. 相似文献
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Peter Weyerstahl 《Advanced Synthesis \u0026amp; Catalysis》1994,336(2):95-109
In contrast to previous hypotheses that there are a few primary odors, recent results show the existence of an extremely large number of receptors each capable of recognizing a small number of odorants. Although in principle enantiomers have different odors, in many cases the size of the difference is small or even zero. Minor structural change often has a major effect on the odor perceived. Detailed results of structure-odor relationship have been obtained with several classes of odorants. Most investigated are the classes of fatty aldehydes, degraded carotenoids, sandalwood odorants, ambergris and musk compounds. Various rules and correlations have been established. Despite numerous excellent studies during the last 30 years the area of structure-odor relationship remains rather confusing. 相似文献
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Peter F. Flood Suzanne R. Abrams Gillian D. Muir Janice E. Rowell 《Journal of chemical ecology》1989,15(8):2207-2217
The behavior of captive male muskoxen was observed closely during their characteristic superiority display, the anatomy of the preputial region was studied in two adults and three calves, and preputial washings and preorbital gland secretion were subjected to gas chromatography and mass spectroscopy. During the superiority display, the prepuce was everted to form a pendulous tube tipped with a fringe of matted hair. Owing to the movement of the animal, the urine that dribbled from the preputial opening was liberally applied to the long guard hairs of the belly. The superiority display was almost exclusively confined to dominant males and apparently accounted for their odor. In the quiescent state, the hair seen around the preputial opening was drawn inside and formed an 8 cm-wide band on the lining of the prepuce. The preputial washings contained large amounts of benzoic acid andp-cresol. The infraorbital gland secretion contained cholesterol, benzaldehyde, and a homologous series of saturated -lactones ranging from 8 to 12 carbons. The latter compounds and the natural secretion smell similar to the human nose. 相似文献
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Keiichi Honda 《Journal of chemical ecology》1980,6(5):867-873
Benzaldehyde, phenylacetaldehyde (major component), 2-phenylpropenal,n-heptanal, 6-methylhept-5-en-2-one, and linalool were identified as compounds responsible for the male scent ofAtrophaneura alcinous alcinous. These substances were present predominantly in the wings, and the quantity of them was largest at the inner margin of the hind wing. Female wings also contained some of them in much smaller (except a few components) amounts. The relative proportion of each component exhibited manifests sexual differences. 相似文献
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气味与嗅觉在环境设计中的地位 总被引:1,自引:0,他引:1
本文涉及环境设计中的嗅觉因素。将人机工程学与芳香治疗学联系起来 ,弥补了人机工程学相关文献中的空白和不足。文章回顾了前人关于气味物质进对人体影响的研究 ,对人机工程学与环境设计工作者和香料工业的专业人士有一定的启发和参考作用 相似文献
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The problems with odor around a typical edible oil deodorizer are discussed in detail, and a three-step solution to eliminate
these problems is presented. The three steps are a distillate recovery system which recovers most of the fatty acid in the
deodorizer vapor discharge as a valuable byproduct, a closed loop barometric cooling water system which keeps the fatladen
hotwell water out of the cooling tower by recirculating it back to the vacuum system after cooling with tower water in a heat
exchanger, and a vapor scrubbing system to eliminate volatile organic compounds which are not removed in the previous two
steps. 相似文献