共查询到20条相似文献,搜索用时 890 毫秒
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胶黏剂作为一种新型的连接材料在国民经济的各个领域应用越来越广泛。胶黏剂的剪切强度与黏接过程中形成的化学键等作用力以及胶黏剂本身的结构有关,同时还与胶接材料表面状况、胶接工艺等因素有密切联系。主要研究了胶接材料的表面处理方法、漂洗水温、胶层厚度、胶液稳定性等因素对胶黏剂剪切强度的影响。 相似文献
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以54-56#全炼蜡或半炼蜡为原料,选用复合表面活性剂作为乳化剂,重点考察了乳化剂用量、乳化温度、乳化时间、搅拌速度等影响石蜡乳化因素.实验结果表明,当乳化剂用量为蜡用量的25%,乳化温度为85~90℃,搅拌速度为400r/min时,乳化时间为30min,可以制取一种稳定的实木防水专用乳化蜡. 相似文献
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一种防锈乳化蜡的研制 总被引:1,自引:0,他引:1
研究了用58#全炼蜡、含氧官能团高分子聚合物制备防锈乳化蜡的方法。考察了石蜡与高分子聚合物比例、乳化剂类型、复合乳化剂、成膜助剂、防锈剂用量对乳液性能的影响。实验结果表明,当乳化剂用量为乳液质量的6%,乳化温度为90~95℃,搅拌速度为800r/min,乳化时间为60min时,可以制取一种稳定的金属制品防锈乳化蜡。 相似文献
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微晶蜡氧化改性及应用 总被引:2,自引:0,他引:2
本文分析了我国微晶蜡生产现状,概迷了微晶蜡氧化改性机理和氧化微晶蜡生产技术。详细论述了氧化微晶蜡在防镑蜡、乳化蜡及塑料润滑用蜡方面的应用情况,最后给出了氧化微晶蜡下游产品生产的若干建议。 相似文献
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本采用不同品种的小麦为原料,首先通过测定小麦籽粒和面粉的品质特性及其阿拉伯木聚糖(AX)含量,对AX含量与小麦粉品质间的关系进行探讨。主要研究结果如下:(1)对小麦品质指标的测定,结果显示不同品种的小麦籽粒间存在较大的差异。面粉中AX含量与蛋白(r=0.27)、麸星含量(r=-0.16)存在存在一定的正相关,而AX含量与白度和降落数值存在微弱的负相关,面粉中AX中含量与面粉的吸水率、面团的形成时间、面团的稳定时间和弱化度呈弱相关性,相关系数分别是r=-0.34、r=0.27和r=-0.09;(2)不同的面粉中AX含量与峰值粘度呈显著负相关,与最低粘度、最终粘度呈弱负相关,当面粉中AX含量增加时,峰值粘度、最低粘度、最终粘度都会降低;峰值粘度与最低粘度、最终粘度呈显著正相关。 相似文献
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FERIAL A. ISMAIL E. T. EL-ASHWAH S. A. EL-FARRA 《International Journal of Consumer Studies》1980,4(3):269-277
The thickening effect of carboxymethylcellulose (CMC) can be put to good use in dietetic food formulation. Therefore, the viscosity behaviour of CMC in suspensions was investigated. A reversible relationship was found between the dynamic viscosity values and concentrations of CMC. The gum has the ability to disperse in water at room temperature. It was also observed that viscosity of CMC depressed upon the addition of sodium benzoate or sweeteners such as sorbitol and saccharin to the system. Viscosity pattern of jam and jelly prepared by using CMC, pectin and gelatin were compared. CMC exerted higher viscosity in the mix. The concentration of 0.5–0.75% CMC was adequate to reach a suitable texture of the product. 相似文献
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Progress in entrepreneurship research is inhibited by lack of agreement on what constitutes an entrepreneurial venture. We argue for an inclusive conceptualization, and the need to distinguish types of entrepreneurial ventures. A typology is proposed consisting of four venture types. Based on the unique characteristics of each type, it is argued that differences will emerge in the identities of the founder and the organization. Evidence of such differences is provided using samples of each venture type. The tendency in contemporary research to ignore differences in venture type is examined. Implications are drawn for theory development, research practice, and managerial practice. 相似文献
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论述了高粘度建筑涂料胶粉的性能、应用范围及生产条件,提出建筑装饰业的发展为其提供了有利条件,指出了高粘度建筑涂料胶粉取代有毒、有害、劣质涂料胶粘剂的必然性,从而预示其广阔的市场前景。 相似文献
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This research addresses the frequently reported finding that business education reduces the ethical sensitivity of students. It presents evidence that supports the view that much of the prior research has relied upon a narrow set of explanatory variables as well as dependent measures of ethical reasoning that often lacked external validity. This research proposes instead, a dependent measure based on students' attitudes toward academic dishonesty and the use of two additional independent variables, locus of control and personality type. In an empirical study,both locus of control and personality type were found to significantly influence students' attitudes to academic dishonesty. Students who studied business however, were no more tolerant of academic dishonesty than students in other programs. Nor did they have a different locus of control or personality-type. Locusof control and personality type were however,significantly correlated. Findings also support the predictive utility of using cheating to understand ethical attitudes in general. 相似文献