三乙醇胺系矿渣复合助磨剂的研究

采用了数种三乙醇胺系复合助磨剂,在相同的粉磨条件下与矿渣共磨,每隔0.5h测定其比表面积并与空白样品对比;然后对所得矿粉用图像分析仪和扫描电镜进行了形貌分析;同时研究了三乙醇胺系复合助磨剂对矿渣-水泥体系标准稠度用水量、凝结时间和胶砂强度等各项性能的影响。结果表明三乙醇胺系复合助磨剂对矿渣的助磨效果好于单一助磨剂,且对矿渣-水泥体系各项性能无不良影响。     

高效矿渣复合助磨剂的试验研究

复配了一种矿渣复合助磨荆.研究它对矿渣的助磨效果.将不同含量的助磨刺在相同的粉磨条件下与矿渣共磨,每隔0.5h测定其比表面积,并与空白样品对比,然后对所得矿粉用图像分析仪和扫描电镜进行形貌分析,同时又研究了此复合助磨剂对矿渣-水泥体系标准稠度用水量、凝结时间、胶砂强度等各项性能的影响.结果表明:复合矿渣助磨剂的助磨效果高,对矿渣水泥的性能无损害且能提高胶砂强度;矿渣中此复合助磨荆的最佳用量为矿渣质量的0.04%～0.08%,粉磨时间应大于1.5h.     

粒化高炉矿渣专用助磨剂的研究与应用

通过对比单一组分三乙醇胺(以下简称TEA)和单一组分丙三醇,以及自制的矿渣助磨剂(以下简称HY-KZJ),并经过小磨和直掺的方式加入助磨剂,探究以上三种助磨剂对矿渣粉磨效果的好坏以及对矿粉-水泥体系性能(标准稠度、凝结时间、胶砂强度)影响的探究。研究数据表明,HY-KZJ助磨剂对矿渣的助磨效果优于单一组分的助磨剂TEA或丙三醇,且对矿渣-水泥体系各项性能无不良影响。     

一种新型复合助磨剂的试验研究

开发一种工业副产品作为水泥助磨剂的原料，并与其它助磨组分复合，评定单组分及多组分助磨剂的助磨效果．以确定单组分的最佳掺量和多组分的复舍对助磨性能的影响。每种助磨剂均在完全相同的试验条件下与水泥共磨一定时间，与空白样以及相应试样进行对比；同时，研究掺入了水泥复合助磨剂后对水泥标准稠度用水量，凝结时间，胶砂强度等各项性能指标的影响，最终确定复合助磨剂的最佳配方。     

一种新型复合助磨剂的实验研究

本文以三乙醇胺、改性丙三醇、十二烷基磺酸钠为主要原料复合一种新型的助磨剂,此助磨剂对矿渣具有良好的助磨效果,通过实验发现,当改性丙三醇是十二烷基磺酸钠4倍摩尔配比关系时,助磨效果最好。实验还研究了助磨剂对不同配比矿渣水泥的助磨效果,结果发现当矿渣比例达到50%,助磨剂掺入量在0.04%情况下助磨效果也显著。实验测试了此助磨剂对水泥性能影响以及对水泥颗粒分布的影响,并且,通过XRD和SEM分析了对水泥水化的影响。     

矿渣助磨剂的试验研究

尝试用数种化学试剂作为矿渣助磨剂，以评定它们的助磨效果。每种试剂都在完全相同的粉磨条件下与矿渣共磨，每隔一定时问测其比表面积并与矿渣空白样对比；之后对其中掺入有效助磨剂粉磨得到的矿粉试样进行激光粒度分析和图像分析仪的颗粒形貌分析；同时，又研究了助磨剂对矿渣—水泥体系标准稠度用水量、凝结时间、胶砂强度等各项性能的影响。并对有效助磨剂的合适掺量进行探索。     

复合助磨剂对水泥性能的影响

三乙醇胺和木质磺酸盐、萘系减水剂组成的复合助磨剂,在三乙醇胺掺量较小时,复合助磨剂都有一定的助磨效果,然而当三乙醇胺掺量增大时,对比表面积增长不利;三乙醇胺、木质磺酸盐、萘系减水剂单掺或复合都可能提高胶砂强度,特别在萘系减水剂(单掺或复合)的掺入情况下对胶砂强度提高最有利。选择0.5%萘系减水剂和0.03%三乙醇胺的复合,水泥胶砂流动度和强度有所提高。     

高炉矿渣复合助磨剂的试验研究

测试并分析了复合助磨剂对矿渣颗粒群特征的影响,确定了矿渣粉磨过程中复合助磨剂的用量。同时研究了复合助磨剂对矿渣-水泥体系标准稠度用水量、凝结时间和胶砂强度等各项性能的影响。     

一种无碱无氯型多功能水泥助磨剂

通过激光粒度分析、休止角测定、胶砂强度实验等方法,从助磨和增强的角度,比较三乙醇胺（TEA）与P剂（与TEA同系的一种醇胺类小极性分子）对普通硅酸盐水泥粉体特性及水泥浆体物理化学性能的影响．结果表明：P剂完全可以取代TEA制得复合多功能助磨剂．用P剂复合的助磨剂对水泥具有良好的助磨和增强作用,水泥3和28d强度均提高10％左右,并且有效提高15％～20％的磨机产量．     

矿渣复合水泥助磨剂助磨性能研究

通过改性丙三醇与十二烷基磺酸钠、三乙醇胺等复合一种助磨剂,将其用于水泥矿渣助磨实验,并以空白和三乙醇胺实验进行对比测试,在试验磨中粉磨一段时间,通过分析比表面积、粒径分布、中值粒径(D0.5)和强度,探讨了对助磨增强效果的影响,结果表明W1助磨性能好于三乙醇胺,明显好于空白。     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008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、不饱和聚酯树脂、环氧树脂)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.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006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生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。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（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。