异丁烯直接胺化制备叔丁胺研究进展

介绍了目前国内外叔丁胺的主要工业化制备方法,综述了异丁烯直接胺化制备叔丁胺的研究进展,并提出利用分子筛催化剂催化异丁烯直接胺化法是目前最有前景的叔丁胺制备方法。     

叔丁胺的制备及应用

着重介绍了目前国内外几种叔丁胺的制备方法,以及叔丁胺在医药,农药、橡胶促进剂等精细化工领域的应用,指出了叔丁胺在我国的市场前景。     

叔丁胺合成技术进展与市场分析

叔丁胺广泛用作医药、农药、橡胶促进剂等领域。本文综述了叔丁胺的各种生产路线,重点介绍叔丁胺清洁工艺异丁烯催化氨化法合成技术进展。介绍了叔丁胺国内外生产现状、市场需求及发展趋势,并提出了发展建议。     

叔丁胺合成技术进展与市场分析

叔丁胺广泛用作医药、农药、橡胶促进剂等领域，本文综述了叔丁胺的各种生产路线，重点介绍叔丁胺清洁工艺——异丁烯催化氨化法合成技术进展。介绍了叔丁胺国内外生产现状，市场需求及发展趋势，分析现状并提出发展建议。     

叔丁胺合成技术进展与市场分析

叔丁胺广泛用作医药、农药、橡胶促进剂等领域，本文综述了叔丁胺的各种生产路线，重点介绍叔丁胺清洁工艺——异丁烯催化氨化法合成技术进展。介绍了叔丁胺国内外生产现状。市场需求及发展趋势，分析现状并提出发展建议。     

叔丁胺合成技术研究进展

本文综述了国内外叔丁胺的生产工艺和催化合成方法的研究进展,重点介绍了叔丁胺清洁生产工艺异丁烯催化氨化法合成技术进展。     

叔丁胺的生产与市场前景

对叔丁胺的各种不同生产工艺进行了比较，介绍了目前国内外叔丁胺的市场需求及应用现状。     

异丁烯直接胺化制叔丁胺

介绍了由石油原料出发制备叔丁胺的合成路线 ,着重讨论了近年来愈益引起重视的异丁烯直接胺化制叔丁胺工艺路线 ,介绍了国内外的最新研究。以热力学分析为基础 ,根据我国国情 ,阐述了在我国利用抽余丁二烯的混合 C4气作为原料直接胺化制叔丁胺的工艺路线是比较经济的。提出低温胺化催化剂的开发 ,是实现异丁烯直接胺化制叔丁胺的基础     

叔丁胺的催化合成及其在精细化工中的应用

综述了国内外叔丁胺的生产工艺和催化合成方法的研究进展。指出固体酸催化甲基叔丁基醚的氨化是值得开发的绿色化工技术。介绍了叔丁胺在医药、农药、橡胶促进剂等精细化工领域的应用。     

克拉维酸叔丁胺丙酮溶剂化物的研究

首次对克拉维酸叔丁胺丙酮溶剂化物的性质和稳定性进行了研究。结果表明,克拉维酸叔丁胺晶体中每3分子克拉维酸叔丁胺结合1分子丙酮,晶体中的丙酮羰基伸缩振动峰在1704.85 cm-1,与游离丙酮明显不同,丙酮是以溶剂化物的形式存在于克拉维酸叔丁胺晶体中。克拉维酸叔丁胺丙酮溶剂化物在颜色、水分、含量、透光率、有关物质等指标上的稳定性优于不含丙酮的克拉维酸叔丁胺晶体,丙酮溶剂化物的存在形式更有利于克拉维酸叔丁胺的稳定。     

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。