石油沥青改性用丁苯胶乳（SBRL）的合成及应用

采用乳液聚合法制备沥青改性用丁苯胶乳。与沥青掺合所形成的改性沥青适用于重交通道路的铺筑，经性能测试和越冬试验，所有技术指标均达到重交通道路对沥青的要求。     

国外沥青改性用了苯胶乳的合成及应用

综述了地青改性用丁苯胶乳的合成方法、沥青与胶乳的掺合方法以及沥青胶乳掺合物的应用领域。     

乳化沥青改性用丁苯胶乳凝胶质量分数影响因素研究

采用复合乳化剂条件下,在过氧化物与亚铁盐组成的氧化还原体系引发作用下合成乳化沥青改性用丁苯胶乳,研究引发剂、乳化剂、相对分子质量调节剂及控温模式对胶乳中ω(凝胶)的影响.结果表明,采用质量分数约4％乳化剂,0.1％～0.2％引发剂,0.225％～0.275％相对分子质量调节剂,并采用三段控温模式(初期温度16～20 ℃,中期温度28～30℃,后期温度38～40℃),可有效控制胶乳中的ω(凝胶).     

大庆丙烷脱沥青路用性能的改性研究

1前言道路沥青改性是目前国内外都在进行研究的课题。国外主要是根据不同的使用要求，对合格的道路沥青改善某些方面的性能。国内道路沥青改性研究始于对年代，由于某些国产道路沥青路用性能差，通过改性可以达到合格的道路沥青的要求。2大庆丙烷脱沥青的改性研究11含蜡量高的问题2．1．1氯化法用氯化法处理沥青，沥青中的石蜡经氯化后，生成氨化石蜡。低度氯化的石蜡在常温下是油状液体，而高度氯化的石蜡在常温下是固态。氯化石蜡具有阻燃性，工业上用作阻燃剂。笔者用此法处理沥青，生成的氯化石蜡可以不分离出去，留在沥青中。固态氯绪…     

黏层用C9石油树脂/SBR复合改性乳化沥青性能研究

采用C₉石油树脂和SBR胶乳制备高性能复合改性乳化沥青,通过三大指标试验、高温和低温流变试验评价了复合改性乳化沥青的宏观服役性能,借助激光粒度分析仪、荧光显微镜和红外光谱仪分析复合改性乳化沥青的储存稳定性和相容性,揭示C₉石油树脂/SBR复合改性剂对乳化沥青的改性机理。结果表明,C₉石油树脂提高了乳化沥青的力学强度和高温抗变形能力,而SBR胶乳明显改善乳化沥青低温抗裂性能,蠕变劲度最大降低30.4%。制备的C₉石油树脂/SBR复合改性乳化沥青储存稳定性良好,C₉石油树脂和SBR胶乳对乳化沥青的复合改性机理为物理混溶,C₉石油树脂的掺量不高于8%。     

防水涂料

9602236丙烯酸乳化沥青防水涂料:CNlll2591A〔中国发明专利申请公开〕/丁铁龙(丁铁龙)一1995.11.29一94102834.8(1994.3.24);IPC C09D4/00 一种丙烯酸乳化沥青防水涂料,由一种胶乳改性乳化沥青制得,其胶乳包含有丙烯酸系单体等组分,用该胶乳改性乳化沥青,可部分或全部代替传统氯丁胶乳化沥青中的氯丁胶,保证了质量,降低了成本,另在低档乳化沥青中掺入其胶乳,可使产品性能与质量提高到中档水平。9602237有机硅防水涂料:JP94一256756〔日本专利公开〕/Shinetsu Chem Ind Co(Ono,Iehiro等)一1994.9.13一6页一93/73031(1993.3.8);IPC C0…     

建筑化学品、粘合剂

五、建筑化学品、粘合剂ＸＬ—型乳化氯丁橡胶沥青乳化氯丁橡胶沥青是用阳离子氯丁胶乳、优质石油沥青制成的新型水乳型橡胶改性涂膜防水材料。它赋于沥青以橡胶的特性，克服了沥青的热淌、冷脆、不耐老化和污染环境的缺点，具有可冷施工、无毒、不燃及不污染环境的优点，...     

基于Fénix法的胶乳掺量对乳化沥青冷再生混合料抗开裂性能影响研究

在公路建设中,乳化沥青冷再生混合料可作为一种柔性基层或中下面层,要求具有一定的承载能力与抗开裂性能.胶乳具备的粘弹特性,可提高乳化沥青冷再生混合料的抗开裂性能.本文基于Fénix法,研究胶乳掺量对乳化沥青冷再生混合料抗开裂性能影响,结果表明,当胶乳掺量小于3％时,对混合料抗开裂性能影响较小,胶乳掺量在4.5％左右时,抗开裂性能明显增强,建议胶乳掺量在4.5％为宜.     

固体沥青改性用丁苯胶乳的工艺研究

以丁二烯和苯乙烯为单体,采用阴离子乳化体系,在过氧化物与亚铁盐构成的氧化还原引发体系作用下,合成了性能良好的固体沥青改性用丁苯胶乳,讨论了影响聚合过程及胶乳性能的因素。结果表明,单体配比、乳化剂浓度、引发剂浓度、分子质量调节剂用量及聚合温度是控制丁苯胶乳性能的关键因素,分批加入乳化剂及梯度控温有利于控制胶乳门尼粘度和结...     

阳离子氯丁胶乳改性水乳化沥青大桥用涂料的研制

介绍了氯丁胶乳改性阳离子乳化沥青的配方、工艺及其性能特点。     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

Sapindaceae,cyanolipids, and bugs

Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA.     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

2008～2009年世界塑料工业进展

收集了2008年7月～2009年6月世界塑料工业的相关资料,介绍了2008～2009年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况。按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、环氧树脂、不饱和聚酯树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍。     

ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究

建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。